Telit Communications S p A GM862P GSM Module User Manual o

Telit Communications S.p.A. GSM Module o

Users Manual

Telit GM862 PCSTri Band GPRS Data Terminal System TECHNICALMANUALCode: 1vv0300638Rev. 2 Oct. 23, 2003
REV SUBJECT OF MODIFICATION DATE SIGNATUREREVISION  INDEXTECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System MOD.   1 Change pcb revision from CS1083 to CS1083a 17/07/03   2 Change value on a PCB components 21/10/03
             INDEX Part1CAP          TITLE                         REV1 INTRODUCTION 22 MECHANICAL VIEW 03TECHNICAL SPECIFICATIONS1TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System
Rev. 2TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal SystemPage 1 of  21 INTRODUCTIONThe Telit GM862 PCS is a Tri Band transceiver with integrated Data Terminal Adapterfunctions that emulates a traditional modem allowing the compatibility in GSM/DCS/PCS environment with many data communication software.The design and development of the Telit GM862 PCS Tri Band cellular data terminalsystem is in line with the following documents:3GPP TS 51.010–1 v. 4.4.0 GSM/EDGE Radio Access Network; Digital cellulartelecommunications system (Phase 2+): Mobile Station (MS) ConformanceSpecification; Part 1. Conformance Specification.EN 301 511 Global system for mobile communications (GSM); Harmonised standardfor mobile stations in the GSM 900 and DCS 1800 bands covering essentialrequirements under Article 3(2) of the R&TTE directive (1999/5/EC).EN 60950 Safety of information technology equipment, including business equipment.EN 301 489–07 Electromagnetic compatibility and radio spectrum matters (ERM);Electromagnetic compatibility (EMC) standard for radio equipment and services; Part7: Specific conditions for mobile and portable radio and ancillary equipment of digitalcellular radio telecommunications systems (GSM and DCS).
Rev. 2TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal SystemPage 2 of  21.1 Delta HW between GM862–PCS HW rev.1 and GM862–PCS HW rev.2The changes that determines the difference between the GM862–PCS HW rev.1 andthe GM862–PCS HW rev.2 are the following:On the GM862–PCS HW rev.2 the following components  are added/changed:Added: R103 47KOhm 0402 between AXE and Vcore.See CP030027 for further details.Changed: R327 changed value from 220R 5% 0402 to 820R 5% 0402See CP030041 for further details.
TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal SystemPage 1 of 12 MECHANICAL VIEW2.1 Mechanical view Telit GM862 PCS
DIS Verif.ProgettoDenominazione dell’oggetto: CODICEN.fogliSostituisce il N.FoglioValido da:DataMODIFICAScala:DATAToll.gen.Materiale:Annotazioni:Il presente disegno a termini di legge non deve essere utilizzato per la costruzione del particolare ne’ riprodotto o reso pubblico senza il nostro permesso scritto.0260Lucà03.07.20031:1 11MECHANICAL VIEW  GM862 PCS   40260NT10072
Rev. 1TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal SystemPage 1 of 13 TECHNICAL  SPECIFICATIONSThe scope of this document is to summarize the technical characteristics of the TelitGM862 PCS Data Terminal System.
Page 1 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1Contents1GENERAL PRODUCT DESCRIPTION.................................................................................71.1 Dimensions .............................................................................................................................................................................71.2 Weight......................................................................................................................................................................................81.3 Environmental requirements ............................................................................................................................................81.3.1 Temperature range.......................................................................................................................................................81.3.2 Vibration Test (non functional).................................................................................................................................81.4 Operating Frequency...........................................................................................................................................................91.5 Transmitter output power..................................................................................................................................................91.6 Reference sensitivity.............................................................................................................................................................91.7 Antenna................................................................................................................................................................................101.7.1 Antenna connector.....................................................................................................................................................101.8 Supply voltage.................................................................................................................................................................... 121.9 Power consumption...........................................................................................................................................................121.10 Embodied Battery charger..............................................................................................................................................121.11 User Interface..................................................................................................................................................................... 131.11.1 Speech Coding............................................................................................................................................................131.11.2 Sim Reader..................................................................................................................................................................131.11.3 SMS..............................................................................................................................................................................131.11.4 Real Time Clock and Alarm.....................................................................................................................................131.11.5 Data/fax transmission................................................................................................................................................131.11.6 Local security management......................................................................................................................................141.11.7 Call control..................................................................................................................................................................141.11.8 Phonebook...................................................................................................................................................................141.11.9 Characters management............................................................................................................................................141.11.10 SIM related functions................................................................................................................................................141.11.11 Call status indication.................................................................................................................................................141.11.12 Indication of network service availability .............................................................................................................141.11.13 Automatic answer (Voice, Data or FAX)..............................................................................................................151.11.14 Supplementary services (SS)....................................................................................................................................151.11.15 Acoustic signaling .....................................................................................................................................................151.11.16 DTMF tones................................................................................................................................................................151.11.17 Buzzer output .............................................................................................................................................................161.12 EMC.......................................................................................................................................................................................161.13 Logic level specifications .................................................................................................................................................161.13.1 Reset signal.................................................................................................................................................................171.14 Audio levels specifications...............................................................................................................................................191.15 Interface connectors on GM862-PCS ..........................................................................................................................20
Page 2 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.11.16 Mounting the GM862-PCS on your Board................................................................................................................. 251.16.1 Antenna Coaxial cable fixing...................................................................................................................................251.16.2 Precautions..................................................................................................................................................................262AT COMMAND........................................................................................................................272.1 Definitions............................................................................................................................................................................272.2 AT Command Syntax.......................................................................................................................................................282.2.1 Command lines...........................................................................................................................................................282.2.2 Information responses and result codes .................................................................................................................292.2.3 Command Response Timeout..................................................................................................................................292.2.4 Command issuing timing..........................................................................................................................................322.2.5 Factory Profile and parameters stored in the profile ............................................................................................322.3 Command Availability Table......................................................................................................................................... 332.4 Hayes Compliant AT Commands ................................................................................................................................. 392.4.1 Generic Modem Control...........................................................................................................................................392.4.1.1 &F - restore factory configuration.....................................................................................................................392.4.1.2 Z - soft reset...........................................................................................................................................................392.4.1.3 +FCLASS - select active service class .............................................................................................................402.4.1.4 &Y - designate a default reset profile ...............................................................................................................402.4.1.5 &W - store current configuration.......................................................................................................................412.4.1.6 &Z - store telephone number in the Telit GM862-PCS module internal phonebook...............................412.4.1.7 &N - display internal phonebook stored numbers ..........................................................................................422.4.1.8 +GMI - request manufacturer identification....................................................................................................422.4.1.9 +GMM - request model identification ..............................................................................................................422.4.1.10 +GMR - request revision identification............................................................................................................432.4.1.11 +GCAP - request capabilities list......................................................................................................................432.4.1.12 +GSN - request serial number............................................................................................................................432.4.1.13 &V - display current configuration & profile ..................................................................................................442.4.1.14 &V0 - display current configuration & profile ................................................................................................452.4.1.15 &V1 - display S registers values .......................................................................................................................452.4.1.16 &V2 - display last connection statistics ...........................................................................................................462.4.1.17 \V - single line connect message .......................................................................................................................462.4.1.18 %L - report line signal level................................................................................................................................472.4.1.19 %Q - report line quality.......................................................................................................................................472.4.2 DTE - modem interface control...............................................................................................................................482.4.2.1 E - command echo................................................................................................................................................482.4.2.2 Q - quiet resut codes ............................................................................................................................................482.4.2.3 V- result code form...............................................................................................................................................492.4.2.4 X - extended result codes....................................................................................................................................492.4.2.5 I - Request identifier and software checksum..................................................................................................502.4.2.6 &C - data carrier detect (DCD) control............................................................................................................502.4.2.7 &D - data terminal ready (DTR) control..........................................................................................................512.4.2.8 &K - flow control.................................................................................................................................................512.4.2.9 &S - data set ready (DSR) control.....................................................................................................................522.4.2.10 \R - ring (RI) control............................................................................................................................................532.4.2.11 +IPR - fixed DTE interface rate.........................................................................................................................532.4.2.12 +IFC - DTE - DTA flow control........................................................................................................................542.4.2.13 +ILRR - DTE - modem rate reporting ..............................................................................................................552.4.2.14 +ICF - DTE - modem character format ............................................................................................................562.4.3 Call Control.................................................................................................................................................................572.4.3.1 D - dial....................................................................................................................................................................572.4.3.2 T - set tone dial......................................................................................................................................................59
Page 3 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.3.3 P - set pulse dial....................................................................................................................................................592.4.3.4 A - answer..............................................................................................................................................................592.4.3.5 A/ - Last command automatic repetition ..........................................................................................................602.4.3.6 H - disconnect.......................................................................................................................................................602.4.3.7 O - return to On Line Mode................................................................................................................................612.4.3.8 &G - guard tone....................................................................................................................................................612.4.3.9 &P - pulse dial make/break ratio........................................................................................................................622.4.4 Modulation control....................................................................................................................................................622.4.4.1 +MS - modulation control...................................................................................................................................622.4.4.2 %E - enable/disable line quality monitor and auto retrain or fallback / fallforward .................................632.4.5 Compression control.................................................................................................................................................642.4.5.1 +DS - set data compression................................................................................................................................642.4.5.2 +DR - data compression reporting ....................................................................................................................642.4.6 Break control...............................................................................................................................................................652.4.6.1 \B - transmit break to remote..............................................................................................................................652.4.6.2 \K - break handling...............................................................................................................................................652.4.7 S parameters................................................................................................................................................................662.4.7.1 S0 - number of rings to auto answer.................................................................................................................662.4.7.2 S1 - ring counter...................................................................................................................................................662.4.7.3 S2 - escape character............................................................................................................................................672.4.7.4 S3 - carriage return character..............................................................................................................................672.4.7.5 S4 - line feed character........................................................................................................................................682.4.7.6 S5 - backspace character.....................................................................................................................................682.4.7.7 S7 - wait time for carrier, silence or dial tone .................................................................................................692.4.7.8 S10 - lost carrier to hang up delay.....................................................................................................................692.4.7.9 S12 - escape prompt delay ..................................................................................................................................702.4.7.10 S25 - delay to DTR off.........................................................................................................................................702.4.7.11 S30 - disconnect inactivity timer........................................................................................................................712.4.7.12 S38 - delay before forced hang up.....................................................................................................................712.5 ETSI GSM 07.07 AT Commands ..................................................................................................................................722.5.1 General.........................................................................................................................................................................722.5.1.1 +CGMI - request manufacturer identification.................................................................................................722.5.1.2 +CGMM - request model identification ...........................................................................................................722.5.1.3 +CGMR - request revision identification.........................................................................................................722.5.1.4 +CGSN - request product serial number identification..................................................................................732.5.1.5 +CSCS - select TE character set........................................................................................................................732.5.1.6 +CIMI - request international mobile subscriber identity (IMSI)................................................................742.5.2 Call control..................................................................................................................................................................752.5.2.1 +CBST - select bearer service type ...................................................................................................................752.5.2.2 +CRLP - radio link protocol...............................................................................................................................762.5.2.3 +CR -  service reporting control.........................................................................................................................772.5.2.4 +CEER - extended error report ..........................................................................................................................782.5.2.5 +CRC - cellular result codes ..............................................................................................................................792.5.3 Network service handling.........................................................................................................................................802.5.3.1 +CNUM - subscriber number.............................................................................................................................802.5.3.2 +CREG - network registration report................................................................................................................812.5.3.3 +COPS - operator selection ................................................................................................................................832.5.3.4 +CLCK - facility lock/ unlock............................................................................................................................842.5.3.5 +CPWD - change facility password ..................................................................................................................852.5.3.6 +CLIP - calling line identification presentation..............................................................................................862.5.3.7 +CLIR - calling line identification restriction .................................................................................................872.5.3.8 +CCFC - call forwarding number and conditions ..........................................................................................882.5.3.9 +CCWA - call waiting.........................................................................................................................................902.5.3.10 +CHLD - call holding services ..........................................................................................................................912.5.3.11 +CUSD - unstructured supplementary service data........................................................................................922.5.3.12 +CAOC - advice of charge..................................................................................................................................94
Page 4 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.3.13 +CLCC -  list current calls ..................................................................................................................................952.5.3.14 +CSSN – SS Notification....................................................................................................................................965.4.3.15       +CCUG – Closed User Group supplementary service control....................................................................972.5.4 Mobile Equipment control........................................................................................................................................982.5.4.1 +CPAS -  phone activity status ..........................................................................................................................982.5.4.2 +CFUN Set phone functionality (Power Saving Management)...................................................................992.5.4.3 +CPIN - enter PIN..............................................................................................................................................1002.5.4.4 +CSQ- signal quality..........................................................................................................................................1022.5.4.5 +CPBS - select phonebook memory storage .................................................................................................1032.5.4.6 +CPBR - read phonebook entries ....................................................................................................................1042.5.4.7 +CPBF - find phonebook entries .....................................................................................................................1052.5.4.8 +CPBW - write phonebook entry ....................................................................................................................1062.5.4.9 +CCLK - Clock Management ..........................................................................................................................1072.5.4.10 +CALA - Alarm Management .........................................................................................................................1082.5.4.11 +CALM - alert sound mode..............................................................................................................................1102.5.4.12 +CRSL - ringer sound level..............................................................................................................................1102.5.4.13 +CLVL - loudspeaker volume level................................................................................................................1112.5.4.14 +CMUT - microphone mute control...............................................................................................................1112.5.4.15 +CACM - accumulated call meter...................................................................................................................1122.5.4.16 +CAMM - accumulated call meter maximum...............................................................................................1122.5.4.17 +CPUC - price per unit and currency table ....................................................................................................1132.5.5 Mobile equipment errors.........................................................................................................................................1142.5.5.1 +CMEE - report mobile equipment error.......................................................................................................1142.5.5.2 +CME ERROR: - ME error result code .........................................................................................................1152.5.6 Voice Control (TIA IS-101)...................................................................................................................................1162.5.6.1 +VTS: - DTMF tones transmission.................................................................................................................1162.5.7 Commands For GPRS .............................................................................................................................................1172.5.7.1 +CGACT - PDP context activate or deactivate.............................................................................................1172.5.7.2 +CGATT - GPRS attach or detach..................................................................................................................1182.5.7.3 +CGDATA - Enter data state...........................................................................................................................1192.5.7.4 +CGDCONT - define PDP context .................................................................................................................1203.3.7.1 +CGPADDR - show PDP address ..................................................................................................................1212.5.7.5 +CGREG - GPRS network registration status ..............................................................................................1223.3.7.2 +CGQMIN - quality of service profile (minimum acceptable)..................................................................1233.3.7.3 +CGQREQ - quality of service profile (requested)......................................................................................1242.5.8 Commands For Battery Charger............................................................................................................................1252.5.8.1 +CBC - Battery Charge .....................................................................................................................................1252.6 ETSI GSM 07.05 AT Commands for SMS and CB services...............................................................................1262.6.1 General configuration..............................................................................................................................................1262.6.1.1 +CSMS - select message service.....................................................................................................................1262.6.1.2 +CPMS - preferred message storage...............................................................................................................1272.6.1.3 +CMGF - message format.................................................................................................................................1282.6.1.4 +CSMP – Set parameters in text mode...........................................................................................................1282.6.1.5 +CSDH – Show parameters in text mode.......................................................................................................1292.6.1.6 +CSAS – Save setting text mode.....................................................................................................................1292.6.1.7 +CRES – Restore text mode settings ..............................................................................................................1302.6.1.8 +CSCB – Select Cell Broadcast Message types ...........................................................................................1312.6.1.9 +CMS ERROR - message service failure result code..................................................................................1322.6.2 Message configuration............................................................................................................................................1332.6.2.1 +CSCA - service center address......................................................................................................................1332.6.3 Message receiving and reading .............................................................................................................................1342.6.3.1 +CNMI - new message indications to Terminal Equipment.......................................................................1342.6.3.2 +CMGL - list messages .....................................................................................................................................1362.6.3.3 +CMGR - read message....................................................................................................................................1382.6.4 Message sending and writing.................................................................................................................................1402.6.4.1 +CMGS - send message ....................................................................................................................................140
Page 5 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.6.4.2 +CMSS - send message from storage.............................................................................................................1412.6.4.3 +CMGW -  write message to memory ............................................................................................................1422.6.4.4 +CMGD - delete message.................................................................................................................................1432.7 Custom AT Commands..................................................................................................................................................1442.7.1 General configuration..............................................................................................................................................1442.7.1.1 #CAP - Change Audio Path..............................................................................................................................1442.7.1.2 #SRS - Select ringer sound...............................................................................................................................1452.7.1.3 #SRP –Select Ringer Path.................................................................................................................................1462.7.1.4 #STM - Signalling Tones Mode ......................................................................................................................1472.7.1.5 #PCT – display PIN Counter............................................................................................................................1472.7.1.6 #SHDN – Software Shut Down .......................................................................................................................1482.7.1.7 #WAKE – Wake from Alarm mode................................................................................................................1492.7.1.8 #QTEMP –Query Temperature overflow.......................................................................................................1502.7.1.9 #SGPO –Set General Purpose Output ............................................................................................................1512.7.1.10 #GGPI – Read General Purpose Input............................................................................................................1522.7.1.11 #GPIO –General Purpose Input/Output pin control.....................................................................................1532.7.1.12 #MONI – Monitor Cells ....................................................................................................................................1552.7.1.13 #QSS – Query SIM Status................................................................................................................................1562.7.1.14 #ACAL – Set Automatic Call...........................................................................................................................1572.7.1.15 #SMOV – SMS Overflow.................................................................................................................................1582.7.1.16 #SHFEC – Set Handsfree echo canceller.......................................................................................................1582.7.1.17 #HFMICG – Handsfree Microphone Gain.....................................................................................................1592.7.1.18 #HSMICG – Handset Microphone Gain ........................................................................................................1592.7.1.19 #SHFSD – Set Handsfree side tone ................................................................................................................1602.7.1.20 #/ – Repeat last command .................................................................................................................................1602.7.1.21 #BND – Select Band  (DCS 1800 or PCS 1900)...........................................................................................1612.8 FAX Class 1 Commands ................................................................................................................................................1622.8.1 General configuration..............................................................................................................................................1622.8.1.1 +FCLASS - select active service class ...........................................................................................................1622.8.1.2 +FMI – Report manufacturer ID......................................................................................................................1632.8.1.3 +FMM? – Report model ID ..............................................................................................................................1632.8.1.4 +FMR – Report revision ID..............................................................................................................................1642.8.2 Transmission/Reception control............................................................................................................................1642.8.2.1 +FTS – Stop Transmission and pause............................................................................................................1642.8.2.2 +FRS – Wait for receive silence ......................................................................................................................1652.8.2.3 +FTM – Transmit data modulation .................................................................................................................1652.8.2.4 +FRM – Receive data modulation...................................................................................................................1662.8.2.5 +FTH – Transmit data with HDLC framing..................................................................................................1662.8.2.6 +FRH – Receive data with HDLC framing....................................................................................................1672.8.3 Serial port control.....................................................................................................................................................1672.8.3.1 +FLO – Select flow control specified by type...............................................................................................1672.8.3.2 +FPR – Select serial port rate...........................................................................................................................1682.8.3.3 +FDD – Double escape character replacement control................................................................................1682.9 Easy GPRS Extension.....................................................................................................................................................1692.9.1 Overview...................................................................................................................................................................1692.9.2 Easy GPRS definition..............................................................................................................................................1692.9.2.1 Configuring the GPRS access..........................................................................................................................1702.9.2.2 Configuring the embedded TCP/IP stack.......................................................................................................1702.9.2.3 Defining the Internet peer to be contacted .....................................................................................................1702.9.2.4 Open the connection with the internet host...................................................................................................1702.9.2.5 Close the Socket and deactivate the context ..................................................................................................1712.9.3 Known limitations ...................................................................................................................................................1712.9.4 Easy GPRS custom AT command Definition.....................................................................................................1722.9.4.1 #USERID – Authentication User ID control.................................................................................................172
Page 6 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.9.4.2 #PASSW – Authentication Password control...............................................................................................1732.9.4.3 #PKTSZ –Packet Size control..........................................................................................................................1742.9.4.4 #DSTO – Data Sending Timeout control.......................................................................................................1752.9.4.5 #SKTTO – Socket inactivity timeout control................................................................................................1762.9.4.6 #SKTSET – Socket definition control............................................................................................................1772.9.4.7 #SKTOP – Socket Open command .................................................................................................................1782.9.4.8 #QDNS – Query DNS........................................................................................................................................1782.9.4.9 #SKTSAV – Socket Parameters Save Command.........................................................................................1792.9.4.10 #SKTRST – Socket Parameters Reset Command.........................................................................................1802.10 Easy Camera custom commands.................................................................................................................................1812.10.1.1 #CAMON – Camera  ON..................................................................................................................................1812.10.1.2 #CAMOFF – Camera  OFF...............................................................................................................................1812.10.1.3 #TPHOTO – Camera Take Photo....................................................................................................................1822.10.1.4 #RPHOTO – Camera Read Photo ...................................................................................................................1822.10.1.5 #CSQUAL – Camera Select Quality of Photo ..............................................................................................1832.10.1.6 #CSMODE – Camera Select Operating MODE............................................................................................1843CONFORMITY ASSESSMENT......................................................................................... 185LIST OF ACRONYMS................................................................................................................. 186
Page 7 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.11  General Product Description1.1 DimensionsThe Telit GM862-PCS module overall dimension are:• Lenght:  43.9 mm• Width:  43.9 mm• Thickness:  6.9   mm• Volume: ≅ 13 cm3The layout of  Telit GM862-PCS module is shown in the following figure:
Page 8 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.11.2 WeightThe Telit GM862-PCS module weight is 23 gr with shield and 16 gr without shield.1.3 Environmental requirementsThe  Telit GM862-PCS module is compliant with the applicable ETSI reference documentationGSM 05.05 Release1999 ETSI EN300910 V8.4.11.3.1 Temperature range• Temperature in normal functional conditions –10°C ÷ +55°C• Temperature in extreme functional conditions* –20°C ÷ +70°C• Temperature in storage conditions –30°C ÷ +85°C*these temperature can affect the sensitivity and performance of the module1.3.2 Vibration Test (non functional)• 10 ÷12Hz    ASD = 1.92m 2 /s 3
Page 9 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1• 12 ÷ 150Hz  –3dB/oct1.4  Operating FrequencyThe operating frequencies in GSM, DCS, PCS modes are conform to the GSM specifications.Mode  Freq. TX (MHz) Freq. RX (MHz) Channels (ARFC) TX - RX offsetE-GSM-900 890.0 - 914.8 935.0 - 959.8 0 – 124 45 MHz880.2 - 889.8 925.2 - 934.8 975 - 1023DCS-1800 1710.2 - 1784.8 1805.2 - 1879.8 512 – 885 95 MHzPCS-1900 1850.2 - 1909.8 1930.2 - 1989.8 512 - 810 80 MHzNOTE: PCS 1900 is supported only in the Telit GM862-PCS module1.5  Transmitter output powerGSM–900The GM862-PCS transceiver module in GSM–900 operating mode are of  class 4 in accordancewith the specification which determine the nominal 2W peak RF power (+33dBm) on 50 Ohm.DCS–1800The GM862-PCS transceiver module in DCS–1800 operating mode are of  class 1 in accordancewith the specifications which determine the nominal 1W peak RF power (+30dBm) on 50 Ohm.PCS–1900The GM862-PCS transceiver module in PCS–1900 operating mode are of  class 1 in accordancewith the specifications which determine the nominal 1W peak RF power (+30dBm) on 50 Ohm.1.6  Reference sensitivityGSM–900The sensitivity of the GM862-PCS transceiver module according to the specifications for the class 4GSM–900 portable terminals is better than –102dBm in all the operational conditions.DCS–1800The sensitivity of the GM862-PCS transceiver module according to the specifications for the class 1portable terminals GSM 1800 is better than –102dBm in normal operating conditions.PCS–1900The sensitivity of the GM862-PCS transceiver module according to the specifications for the class 1portable terminals PCS 1900 is better than –102dBm in normal operating conditions.
Page 10 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.11.7 AntennaThe antenna that the customer chooses to use, depending on his application, should fulfil thefollowing requirements:Frequency range Standard Dual Band frequency range,Standard Tri Band frequency range for -PCSBandwith 80 MHz in GSM & 170 MHz in DCS & 140MHz PCS bandGain > 0 dB (referenced to l/2 dipole)Impedance 50 ohmInput power > 2 W peak powerNOTE: PCS 1900 frequency coverage is required only for the Telit GM862-PCS module1.7.1  Antenna connectorThe Telit GM862-PCS module includes a 50 Ohm MMCX coaxial female 2 PIN Angle Coax SMDJ01341A0081 connector to allow the antenna connection.On the user application side the following connector must be used:a) Telegärtner MMCX angle plug crimp - Order n. J01340A0121
Page 11 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1connector is locatable at:Telegärtner - K. Gärtner GmbHLerchenstrasse 35, D-71144 SteinenbronnPhone: (+49) 71 57 125 100NOTE: be very careful when connecting the Telit GM862-PCS module RF connector. The TelitGM862-PCS module RF connector can be damaged if not connected with the proper antennaRF connector. The minimum number of insertion cycles are recommended.
Page 12 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.11.8 Supply voltageThe external power supply must be connected to VBATT signal (see paragraph 1.15,Interfaceconnectors on GM862-PCS) and must fulfil the following requirements:• Nominal operating voltage 3.8 V• Operating voltage range 3.4 V - 4.2 V1.9  Power consumptionThe typical current consumption of the Telit GM862-PCS module are:• Power off current (typical) 26 µA;• Stand–by current < 17 mArms (< 4 mArms using command AT+CFUN )• Operating current 250 mArms @ typical network conditions• Operating current 350 mArms 1.9 Apeak  @ worst network conditions1.10 Embodied Battery chargerThis feature is available only on the Telit GM862-PCS.The battery charger is suited for 3.7V rechargeable Li-Ion battery and it might be used with lessperformances also with different technology batteries. The Charger needs only 1 CURRENTLIMITED power source input and charges the battery directly through VBATT connector pins.• Battery charger input pin  CHARGE• Battery pins VBATT, GND• Battery charger input voltage min  5.0 V• Battery charger input voltage typ  5.5 V• Battery charger input voltage max  7.0 V• Battery charger input current max 400mA• Battery type Rechargeable Li-IonNOTE: If embodied battery charger is used, then a LOW ESR capacitor of at least 100µF must bemounted in parallel to VBATT  GM862-PCS pins.NOTE: when power is supplied to the CHARGE pin, a battery must always be connected to theVBATT pins of the GM862-PCS.
Page 13 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.11.11 User InterfaceThe user interface is managed by AT commands specified on the GSM 07.07 and 07.05specification and listed in the chapter 2,  AT Command.1.11.1 Speech CodingThe Telit GM862-PCS vocoder supports the following rates:• Half Rate.• Full rate,• Enhanced Full Rate1.11.2 Sim ReaderThe Telit GM862-PCS support phase 2 GSM11.14 - SIM 3 volts ONLY. For 5V SIM operation anexternal level translator can be added.Furthermore the Telit GM862-PCS have an internal built-in SIM card reader, so there's no need foran external SIM housing.The  Telit GM862-PCS has an enhanced internal built-in SIM card reader that allows also hotremoval of the SIM sensing, so there's no need for an external SIM housing.1.11.3  SMSThe Telit GM862-PCS module supports the following SMS types:Mobile Terminated (MT) class 0 – 2 with signalling of new incoming SMS, SIM full, SMS readMobile Originated class 0 – 3 with writing, memorise in SIM and sendingCell Broadcast compatible with CB DRX with signalling of new incoming SMS.1.11.4 Real Time Clock and AlarmThe  Telit GM862-PCS module supports the Real Time Clock and Alarm functions through ATcommands, furthermore an alarm output pin (GPIO6) can be configured to indicate the alarm with ahardware line output.1.11.5  Data/fax transmissionThe Telit GM862-PCS module supports:• Packed Data transfer GPRS Class B, Multislot Class 10.• Data transmission according to the GSM 07.07, 07.05• CSD up to 14.4 Kbps• Fax service, Class 1 Group 3
Page 14 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.11.11.6  Local security managementWith lock of Subscriber Identity module (SIM), and security code request at power–up.1.11.7  Call controlCall cost control function.1.11.8 PhonebookFunction available to store the telephone numbers in SIM memory.Capability depends on SIM version/memory1.11.9 Characters managementAvailability of lowercase, uppercase and IRA characters. (international reference alphabet)In SMS PDU mode all character set are supported.1.11.10 SIM related functionsActivation/deactivation of the numbers stored in phone book FDN, ADN and PINs. Extension at thePIN2 for the PUK2 insertion capability for lock condition.1.11.11 Call status indicationBy AT commands.1.11.12 Indication of network service availabilityBy AT commands and LED indication on dedicated output.The STAT_LED is an Open Collector output where it is possible to directly connect a LED to showinformation on the network service availability and Call status.   STAT_LED indicationsLED status Device Statuspermanently off device offfast blinking(period 1s, Ton 0,5s)Net search / Notregistered / turningoffslow blinking(period 3s, Ton 0,3s)Registered fullservicepermanently on a call is active
Page 15 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.11.11.13 Automatic answer (Voice, Data or FAX)After n (depends of settings) rings automatically answers with beep (see S0 param).1.11.14 Supplementary services (SS)• Call Barring,• Call Forwarding,• Calling Line Identification Presentation (CLIP),• Calling Line Identification Restriction (CLIR),• Call Waiting, other party call Waiting Indication,• Call Hold, other party Hold / Retrieved Indication,• Closed User Group supplementary service (CUG),• Advice of Charge,• Unstructured SS Mobile Originated (MO)1.11.15 Acoustic signalingThe acoustic signalling of Telit GM862-PCS module on the selected acoustic device are thefollowing:• Call waiting;• Ringing tone;• SMS received tone;• Busy tone;• Power on/off tone;• Off Hook dial tone;• Congestion tone;• Connected tone;• Call dropped;• No service tone;• Alarm tone.1.11.16 DTMF tonesDTMF tones managed by specific AT commands.These tones are generated with AT commands only during voice calls.The minimum duration of a DTMF tone is 100 ms.
Page 16 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1Group highGroup low 1209 Hz 1336 Hz 1477 Hz697 Hz 1 2 3770 Hz 4 5 6852 Hz 7 8 9941 Hz * 0 #1.11.17 Buzzer outputThe General Purpose I/O pin GPIO7 can be configured to output the BUZZER output signal, withonly an external Mosfet/transistor and a diode a Buzzer can be directly driven.The ringing tone and the other signaling tones can be redirected to this Buzzer output with aspecific AT command.1.12 EMCCompliant to & ETS 300–342–1 and all applicable GSM Specifications.Compliant to Directive 1999/05/CE.1.13 Logic level specificationsWhere not specifically stated, all the interface circuits work at 2.8V CMOS logic levels.The following table shows the logic level specifications used in the  Telit GM862-PCS moduleinterface circuits:Absolute Maximum Ratings -Not FunctionalParameter Min MaxInput level on anydigital pin when on -0.3V +3.75VInput voltage onanalog pins when on -0.3V +3.0 V
Page 17 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1Operating Range - Interface levels (2.8V CMOS)Level Min MaxInput high level 2.1V 3.3VInput low level 0V 0.5VOutput high level 2.2V 3.0VOutput low level 0V 0.35VFor 2,0V signals:Operating Range - Interface levels (2.0V CMOS)Level Min MaxInput high level 1.6V 3.3VInput low level 0V 0.4VOutput high level 1,65V 2.2VOutput low level 0V 0.35V1.13.1  Reset signalSignal Function I/O PinRESET Phone reset I/O 23 (connector SO301)RESET is used to reset the  Telit GM862-PCS module. Whenever this signal is pulled low, theGM862 is reset. When the device is reset it stops any operation and after the release of the reset itshuts down, without doing any detach operation from the network where it is registered to. Thisbehavior is not a proper shut down because any GSM device is requested to issue a detach requeston turn off. For this reason the Reset signal must not be used to normally shutting down the device,but only as an emergency exit in the rare case the device remains stucked waiting for some networkresponse.The RESET is internally controlled on start-up to achieve always a proper power-on reset sequence,so there's no need to control this pin on start-up. It may only be used to reset a device already onthat is not responding to any command.NOTE: do not use this signal to power off the Telit GM862-PCS module. Use the ON/OFFsignal (Pin 17 of SO301) to perform this function or the AT#SHDN command.
Page 18 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1Reset Signal Operating levels:Signal Min MaxRESET Input high 2.2V* 3.3VRESET Input low 0V 0.2V* this signal is internally pulled up so the pin can be left floating if not used.If unused, this signal may be left unconnected. If used, then it must always be connected with anopen collector transistor, to permit to the internal circuitry the power on reset and undervoltagelockout functions.
Page 19 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.11.14 Audio levels specificationsThe audio of the Telit GM862-PCS, module is organised into two main paths:- internal path (called also MT)- external path (called also HF)These two paths are meant respectively for handset and headset/handsfree use.The Telit GM862-PCS module has a built in echo canceller and a noise suppressor, tuned separatelyfor the two audio paths; for the internal path the echo canceller parameters are suited to cancel theecho generated by a handset, while for the external audio path they are suited for a handsfree use.For more information on the audio refer to the Hardware User Guide.The following table reports all the audio level specifications.Microphone characteristicsInternal audio mic. input External audio mic. inputLine coupling AC ( 100nF cond.) AC ( 100nF cond.)Line type Balanced BalancedDifferential input resistance 25kΩ25kΩLine nominal sensitivity 50mVrms 3mVrmsMax input voltage 360mVrms 22mVrmsMicrophone nominal sensitivity- Analog Gain suggested -45dBVrms/Pa  /  +24dB -45dBVrms/Pa  /  +10dBEcho canceller type Handset Car kit hands freeSpeaker characteristicsInternal audio ear. output External audio ear. outputLine coupling DC DCLine type Bridged BridgedSpeaker impedance ≥ 16Ω ± 5% @ 1kHz ≥ 16Ω ± 5% @ 1kHzMinimun load impedance 15Ω15ΩSignal bandwidth 150-8000 Hz @ -3dB 150-8000 Hz @ -3dBMaximum output 1700mVrms 850mVrmsMaximum power output 30mW 7.5mWVolume level steps (SW) -2dB -2dBNumber of volume steps (SW) 10 10
Page 20 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.11.15 Interface connectors on GM862-PCSThe Telit GM862-PCS module has two interface connectors and a SIM Card reader:1) SO601: Antenna connector (see 1.7.1, Antenna connector)2) SO301: Interface connector3) SO402: SIM Card ReaderThe GM862-PCS transceiver module interface connector SO301 is a CSTP 50 pin vertical SMDMolex 52991–0508 (male). Its pin-out (down view) is:                                          49           50                                            1           2Connector Positionand PIN-Out orderAntenna connectorposition(on thevertical side)SIM CARD readerposition (on thevertical side)
Page 21 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1Molex 52991-0508 (male) GM862-PCS Connector LAY-OUT
Page 22 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1Molex 52991-0508 (male) GM862-PCS Connector PIN-OUTPin Signal I/O Function InternalPull upType1VBATT -Main power supply Power2GND -Ground Power3VBATT -Main power supply Power4GND -Ground Power5VBATT -Main power supply Power6GND -Ground Power7VBATT -Main power supply Power8CHARGE AI Battery Charger Input (5) Power9EAR_HF+ AO Handsfree ear output, phase + Audio10 EAR_MT- AO Handset earphone signal output, phase - Audio11 EAR_HF- AO Handsfree ear output, phase - Audio12 EAR_MT+ AO Handset earphone signal output, phase + Audio13 MIC_HF- AI Handsfree microphone input; phase -,nominal level 3mVrms Audio14 MIC_MT+ AI Handset microphone signal input; phase+,nominal level 50mVrms Audio15 MIC_HF+ AI Handsfree microphone input; phase +,nominal level 3mVrms Audio16 MIC_MT- AI Handset microphone signal input; phase-,nominal level 50mVrms Audio17 ON/OFF IInput command for switching power ON orOFF (toggle command). The pulse to besent to the GM862 must be equal or greaterthan 1 second.10KΩCMOS 2.8V18 AXE IHandsfree switching 47KΩ2.0V signal19 SIMIO I/O External SIM signal - Data I/O 3V ONLY20 C103/TXD ISerial data input (TXD) from DTE CMOS 2.8V21 PWRCTL/CAM_SYNCOModule Status ON indication (Signaloutput for power on/off control of externaldevices) /Camera interface on –PCS (4)820ΩCMOS 2.8V22 SIMVCC -External SIM signal – Power (3) 3V ONLY
Page 23 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.123 RESET IReset input 2KΩsee par.1.13.124 SIMRST OExternal SIM signal – Reset 3V ONLY25 MON1_CAM I/O Camera Interface on –PCS (4) CMOS 2.8V26 SIMCLK OExternal SIM signal – Clock 3V ONLY27 CCIN I/O External SIM signal – Presence (activelow) 47KΩCMOS 2.8V28 GPIO2 OGeneral purpose output (Open Collector) /Camera Interface on –PCS (4)Open Collector29 C106/CTS OOutput for Clear to send signal (CTS) toDTE CMOS 2.8V30 C125/RING OOutput for Ring indicator signal (RI) toDTE CMOS 2.8V31 GPIO1 IGeneral purpose input transistor base32 PD[0] I/O Camera Interface on –PCS (4) CMOS 2.8V33 C107/DSR OOutput for Data set ready signal (DSR) toDTE CMOS 2.8V34 PD[1] I/O Camera Interface on –PCS (4) CMOS 2.8V35 EMMI TX OTX Data for debug monitor (1) CMOS 2.8V36 C109/DCD OOutput for Data carrier detect signal (DCD)to DTE CMOS 2.8V37 C104/RXD OSerial data output to DTE CMOS 2.8V38 PD[2] I/O Camera Interface on –PCS (4) CMOS 2.8V39 STAT_LED OStatus indicator led Open Collector40 PD[3] I/O Camera Interface on –PCS (4) CMOS 2.8V41 EMMI RX IRX Data for debug monitor (1) CMOS 2.8V42 PD[4] I/O Camera Interface on –PCS (4) CMOS 2.8V43 C108/DTR IInput for Data terminal ready signal (DTR)from DTE (4) CMOS 2.8V44 PD[5] I/O Camera Interface on -PCS (4) CMOS 2.8V45 C105/RTS IInput for Request to send signal (RTS)from DTE CMOS 2.8V46 GPIO3 /PD[6]I/O Configurable general purpose I/O pin /Camera Interface on -PCS (4)CMOS 2.8V47 GPIO4IICSDAI/O Configurable general purpose I/O pin /Camera Interface on -PCS (4)CMOS 2.8V
Page 24 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.148 GPIO5CAM_DRDYI/O Configurable general purpose I/O pin /Camera Interface on -PCS (4)CMOS 2.8V49 GPIO6/ALARM/PD[7]I/O GP I/O pin or ALARM output pin /Camera Interface on -PCS (4)CMOS 2.8V50 GPIO7/BUZZER/CAM_PWR_ONI/O GP I/O pin  or BUZZER output pin /Camera Interface on -PCS (4)CMOS 2.8V(1) For the exclusive use of the Technical Support Service(2) An earphone with a 150 ohm impedance can be directly connected to EAR+ and EAR–(3) On this pin a maximum of 47nF bypass capacitor is allowed.(4) When activating the Easy camera these pins will not be available for other use
Page 25 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.11.16 Mounting the GM862-PCS on your BoardIn order to electrically connect your board to the Telit GM862-PCS module, use a CSTP 2x25 pinvertical SMD SCH–SCH Molex 53748 - 0504 (female, low profile) as a counterpart to the CSTP50 pin vertical SMD Molex 52991–0508 (male) of your Telit GM862-PCS module.When mounting the Telit GM862-PCS module on your board, take care of soldering the GM862-PCS shielding reeds on a ground plane or signal.NOTE: be very careful when connecting the Telit GM862-PCS module RF connector. The TelitGM862-PCS module RF connector can be damaged if not connected with the proper antennaRF connector. The minimum number of insertion cycles is recommended.1.16.1 Antenna Coaxial cable fixingThe following constraints must be respected in the Telit GM862-PCS antenna cable connection:- The fixing point of the coaxial cable must not be placed too close to the antenna connector,leaving at least 30mm of flexible cable between the fixed point and the plug end.- The fixing point must be at the same height of the antenna connector, eventually using a  wedgebetween the PCB and the cable if it is directly fixed to the PCB.- The flexible cable must never be bent with a radius lower than 25mm (RG174 cable).- The cable must be a RG174 type or more flexible ones.The following pictures explain these constraints:- Angle connector fixing example -
Page 26 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1- Angle connector fixing example 2 -NOTE: in the examples the cable is always bent, this is not a constrain. If the installation doesnot require it, then the cable can be kept straight, ensuring that the fixing is without sliding.1.16.2 Precautions- The plug should be inserted in the connector only after the installation of  the Telit GM862-PCSmodule in the board. This is to prevent accidental breaking of the antenna connection during thetransport.- The coaxial cable must be fixed at least in one point, without sliding possibilities.- The plug insertion/removal must be done axially with the female connector of the GM862-PCS,keeping lateral strains to a minimum.- The insertion/crimping pull out force must be less than 15N.
Page 27 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12  AT CommandThe  Telit GM862-PCS module can be driven via the serial interface using the standard ATcommands1. The Telit GM862-PCS module is compliant with:1. Hayes standard AT command set, in order to maintain the compatibility with existing SWprograms.2. ETSI GSM 07.07 specific AT command and PCS specific commands.3. ETSI GSM 07.05 specific AT commands for SMS (Short Message Service) and CBS (CellBroadcast Service)4. FAX Class 1 compatible commandsMoreover the Telit GM862-PCS module supports also Telit proprietary AT commands for specialpurposes.In the following the dedicated description of how to use the AT commands with the Telit GM862-PCS module.2.1 DefinitionsThe following syntactical definitions apply:<CR> Carriage return character, is the command line and result code terminator character, whichvalue, in decimal ASCII between 0 and 255,is specified within parameter S3.The default value is 13.<LF> Linefeed character, is the character recognised as line feed character. Its value, in decimalASCII between 0 and 255, is specified within parameter S4. The default value is 10.The line feed character is output after carriage return character if verbose result codes are used (V1option used ) otherwise, if numeric format result codes are used (V0 option used) it will not appearin the result codes.<...> Name enclosed in angle brackets is a syntactical element. They do not appear in thecommand line.[...] Optional subparameter of a command or an optional part of TA information responseis enclosed in square brackets. Brackets themselves do not appear in the command line. Whensubparameter is not given in AT commands which have a read command, new value equals to itsprevious value. In AT commands which do not store the values of any of their subparameters, andso have not a read command, which are called action type commands, action should be done on thebasis of the recommended default setting of the subparameter.                                                1 The AT is an ATTENTION command and is used as a prefix to other parameters in a string. TheAT command combined with other parameters can be set up in the communications package ortyped in manually as a command line instruction.
Page 28 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.2  AT Command SyntaxGSM commands use syntax rules of extended commands.Every extended command has a test command (trailing =?) to test the existence of the commandand to give information about the type of its subparameters. There are two types of extendedcommand:- Parameter type commands which also have a read command (trailing ?) to check the currentvalues of subparameters.- Action type commands do not store the values of any of their possible subparameters, andtherefore do not have a read command.2.2.1 Command linesThe basic structure of the command lines are:• ATCMD1<CR> where AT is the command line prefix, CMD1 is a basic command (i.e. it havenot + prefix) and CR is the command line terminator character• ATCMD2=10<CR> where 10 is a subparameter• AT+CMD1;+CMD2=, ,10<CR> These are two examples of extended commands (which have a+ prefix). They are delimited with semicolon. In the second command the subparameter isomitted• +CMD1?<CR> This is a read command for checking current subparameter values• +CMD1=?<CR> This is a test command for checking possible subparameter valuesThese commands might be performed in a single command line as shown below:ATCMD1 CMD2=10+CMD1;+CMD2=, ,10;+CMD1?;+CMD1=?<CR>anyway it is always preferable to separate into different command lines the basic commands (i.e.without + prefix) and the extended commands (the ones with + prefix); furthermore it is suggestedto avoid placing several action commands in the same command line, because if one of them fails,then an error message is received but it is not possible to argue which one of them has failed theexecution.If command V1 is enabled (verbose responses codes) and all commands in a command line hasbeen performed successfully, result code <CR><LF>OK<CR><LF> is sent from the TA to the TE,if subparameter values of a command are not accepted by the TA or command itself is invalid, orcommand cannot be performed for some reason, result code <CR><LF>ERROR<CR><LF> is sentand no subsequent commands in the command line are processed. If command V0 is enabled (numeric responses codes), and all commands in a command line hasbeen performed successfully, result code 0<CR> is sent from the TA to the TE, if sub-parametervalues of a command are not accepted by the TA or command itself is invalid, or command cannotbe performed for some reason, result code 4<CR> and no subsequent commands in the commandline are processed.In case of errors depending on ME operation, ERROR (or 4) response may be replaced by  +CMEERROR: <err> or +CMS ERROR: <err>.
Page 29 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.2.2  Information responses and result codesThe TA response, in case of verbose response format enabled, for the previous examples commandline could be as shown below:information response to +CMD1? <CR><LF>+CMD1:2,1,10<CR><LF>information response to +CMD1=? <CR><LF>+CMD1(0-2),(0,1),(0-15)<CR><LF>final result code <CR><LF>OK<CR><LF>Moreover there are other two types of result codes:•  result codes that inform about progress of TA operation (e.g. connection establishmentCONNECT)•  result codes that indicate occurrence of an event not directly associated with issuance of acommand from TE (e.g. ring indication RING).Here the basic result codes according to ITU-T V25Ter recommendationResult CodesNumeric form Verbose form0OK1CONNECT2RING3NO CARRIER4ERROR6NO DIALTONE7BUSY8NO ANSWER2.2.3  Command Response TimeoutEvery command issued to the Telit GM862-PCS module returns a result response if response codesare enabled (default). The time needed to process the given command and return the response variesfrom command to command and may depend also from the network on which the command mayinteract. As a result every command is provided with a proper timeout time, if this time elapseswithout any result from the operation, then an ERROR response can be reported as if the operationwas not successful and the operation is anyway terminated.The timeout time is quite short for commands that imply only internal set up commands, but may bevery long for command that interact with the network (or even a set of Networks).The default timeout is 100 ms for all the commands that have no interaction with the network orupper software layers.
Page 30 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1In the table below are listed all the commands whose timeout differs from the default 100 ms andtheir effective timeout is reported:Command Timeout  (Seconds)+CBST 0.2+CR 0.2+CRC 0.2+CRLP 0.2+CSCS 0.2+CEER 5+CGMI 5+CGMM 5+CGMR 5+CGSN 20+CIMI 20+CNUM 20+CREG 5+COPS 180+CLCK 180+CPWD 180+CLIP 180+CLIR 180+CCFC 180+CCWA 20+CHLD 20+CUSD 180+CAOC 20+CSSN 20+CLCC 20+CPAS 5+CPIN 20+CSQ 5+CPBS 5+CPBR 20+CPBF 20+CPBW 20+CALM 5+CRSL 5
Page 31 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+CLVL 5+CMUT 5+CACM 20+CAMM 20+CPUC 20+CMEE 5+VTS 20+GMI 5+GMM 5+GMR 5+GSN 20I3 5I4 5I5 5+CSMS 5+CPMS 5+CMGF 5+CSCA 20+CSMP 5+CSDH 5+CSAS 5+CRES 5+CNMI 5+CMGS 180 / 5 for prompt">"+CMSS 180+CMGW 5 / 5 for prompt">"+CMGD 5+CMGR 5+CMGL 5#CAP 10#SRS 10#SRP 10#STM 10#PCT 10#SHDN 10#QTEMP 10#SGPO 10#GGPI 10
Page 32 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1#MONI 10+CGACT 180+CGATT 180+CGDATA 20+CGDCONT 20+CGPADDR 20+CGQMIN 20+CGQREQ 202.2.4  Command issuing timingThe chain Command -> Response shall always be respected and a new command must not beissued before the GM862-PCS has terminated all the sending of its response result code (whatever itmay be).This applies especially to applications that "sense" the OK text and therefore may send the nextcommand before the complete code <CR><LF>OK<CR><LF> is sent by the GM862-PCS.It is advisable anyway to wait for at least 20ms between the end of the reception of the response andthe issue of the next AT command.If the response codes are disabled and therefore the module does not report any response to thecommand, then at least the 20ms pause time shall be respected.During command mode, due to hardware limitations, under severe CPU load the serial port canloose some characters if placed in autobauding at high speeds. Therefore if you encounter thisproblem fix the baud rate with AT+IPR command.2.2.5  Factory Profile and parameters stored in the profileThe GM862-PCS stores several command configurations in the internal non volatile memory (seecommand &W), allowing to remember this status even after power off.The parameters that are stored in the profile and their are:GSM DATA MODE                  : +CBST: 0,0,1AUTOBAUD                       : +IPR: 0COMMAND ECHO                   : E1RESULT MESSAGES                : Q1VERBOSE MESSAGES               : V1EXTENDED MESSAGES              : X1FLOW CONTROL OPTIONS           : &K3CTS (C106) OPTIONS             : &B2DSR (C107) OPTIONS             : &S3DTR (C108) OPTIONS             : &D0DCD (C109) OPTIONS             : &C1RI (C125) OPTIONS              : \R1C108/1 OPERATION               : &D4POWER SAVING                   : +CFUN: 1DEFAULT PROFILE                : &Y0S REGISTERS:  S0=0;S1=0;S2=43;S3=13;S4=10;S5=8;S7=60;S12=50;S25=5;S38=20
Page 33 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.3  Command Availability TableThe available command, depending on the module are evidenced in the following table:PRODUCTCOMMAND GM862-PCS GM862-GPRS GM862-GSM&F •••Z•••+FCLASS •••&Y •••&W •••&Z •••&N •••+GMI •••+GMM •••+GMR •••+GCAP •••+GSN •••&V •••&V0 •••&V1 •••&V2 •••\V •••%L •••%Q •••E•••Q•••V•••X•••I•••&C •••&D •••&K •••&S •••\R •••
Page 34 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+IPR •••+IFC •••+ILRR •••+ICF •••D•••T•••P•••A•••H•••O•••&G •••&P •••+MS •••%E •••+DS •••+DR •••\B •••\K •••S0 •••S1 •••S2 •••S3 •••S4 •••S5 •••S7 •••S10 •••S12 •••S25 •••S30 •••S38 •••ETSI GSM 07.07 AT COMMANDS+CGMI •••+CGMM •••+CGMR •••
Page 35 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+CGSN •••+CSCS •••+CIMI •••+CBST •••+CRLP •••+CR •••+CEER •••+CRC •••+CNUM •••+CREG •••+COPS •••+CLCK •••+CPWD •••+CLIP •••+CLIR •••+CCFC •••+CCWA •••+CHLD •••+CUSD •••+CAOC •••+CLCC •••+CSSN •••+CCUG •••+CPAS •••+CFUN •••+CPIN •••+CSQ •••+CPBS •••+CPBR •••+CPBF •••+CPBW •••+CCLK •••+CALA •••+CALM •••
Page 36 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+CRSL •••+CLVL •••+CMUT •••+CACM •••+CAMM •••+CPUC •••+CMEE •••+VTS •••+CGACT • •+CGATT • •+CGDATA • •+CGDCONT • •+CGPADDR • •+CGREG • •+CGQMIN • •+CGQREQ • •+CBC •ETSI GSM 07.05 AT COMMANDS+CSMS •••+CPMS •••+CMGF •••+CSMP •••+CSDH •••+CSAS •••+CRES •••+CSCB •••+CSCA •••+CNMI •••+CMGL •••+CMGR •••+CMGS •••+CMSS •••+CMGW •••+CMGD •••
Page 37 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1CUSTOM AT COMMANDS#CAP •••#SRS •••#SRP •••#STM •••#PCT •••#SHDN •••#WAKE •••#QTEMP •••#SGPO •••#GGPI •••#GPIO •••#MONI •••#QSS •••#ACAL •••#SMOV •••#SHFEC •••#HFMICG •••#HSMICG •••#SHFSD •••#/ •••#BND •FAX CLASS 1 AT COMMANDS+FCLASS •••+FMI •••+FMM? •••+FMR •••+FTS •••+FRS •••+FTM •••+FRM •••+FTH •••+FRH •••+FLO •••
Page 38 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+FPR •••+FDD •••EASY GPRS EXTENSION AT COMMANDS#USERID • •#PASSW • •#PKTSZ • •#DSTO • •#SKTTO • •#SKTSET • •#SKTOP • •#QDNS • •#SKTSAV • •#SKTRST • •EASY CAMERA EXTENSION AT COMMANDS#CAMON •#CAMOFF •#TPHOTO •#RPHOTO •#CSQUAL •#CSMODE •
Page 39 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4  Hayes Compliant AT Commands2.4.1  Generic Modem Control2.4.1.1  &F - restore factory configuration&F – restore factory configurationExecute commandAT&F Calls the factory configuration, resetting the default profile.Read commandWrite commandTest commandExampleReference V25ter.SW release Version A2.4.1.2  Z - soft resetZ – soft resetExecute commandATZ <n> Send a software reset to device, loading on the configuration the specifieddefault profile.Parameter: <n > = 0…1  -  profileNote: Must be the last command on the line.Read commandWrite commandTest commandExampleReference V25ter.SW release Version A
Page 40 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.1.3  +FCLASS - select active service class+FCLASS - select active service classExecute commandRead commandAT+FCLASS? Returns the current configuration value of the parameter <n>.Write commandAT+FCLASS= <n> Set the GM862-PCS in specified connection mode (data, fax, voice), henceall the calls done after, will be data or voice.Parameter:<n>:     0 = data<n>:     1 = fax class 1<n>:     8 = voiceTest commandAT+FCLASS=? Returns all supported values of the parameters <n>.ExampleReference GSM 07.07SW release Version A2.4.1.4  &Y - designate a default reset profile&Y – designate a default reset profileExecute commandAT&Y <n> The GM862-PCS is able to store 2 complete configurations (see command&W). The command &Y defines which one of the 2 profiles will be thedefault profile to be loaded on startup.Parameter: <n> = 0…1  - profileNote: Differently from ATZ<n> command which simply loads the desiredprofile , with the command AT&Y the chosen profile becomes the onewhich will be loaded on every startup.Read commandWrite commandTest commandExampleReferenceSW release Version A
Page 41 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.1.5  &W - store current configuration&W – store current configurationExecute commandAT&W <n> Stores on profile n the complete configuration of the device.Parameter: <n> = 0…1  - profileRead commandWrite commandTest commandExampleReferenceSW release Version A2.4.1.6  &Z - store telephone number in the Telit GM862-PCS module internalphonebook&Z – store telephone number in the GM862-PCS internal phonebookExecute commandAT&Z <n> = <nr> The GM862-PCS has a built in non volatile memory in which telephonenumbers of a maximum 24 digits can be stored. The command AT&Z <n> =<nr> stores in the record n the telephone number nr. The records cannot beoverwritten, they must be cleared before rewriting.Parameter:<n>:  phonebook record     <nr>:  telephone numberNote1: To delete the record <n> the command AT&Z<n>=  must be issued.Note2: The records in the GM862-PCS memory can be viewed with thecommand AT&N, while the telephone number stored in the record n can bedialled by giving the command ATDS=<n>.Read commandWrite commandTest commandExampleReferenceSW release Version A
Page 42 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.1.7  &N - display internal phonebook stored numbers&N – display internal phonebook stored numbersExecute commandAT&N <n> Returns the telephone number stored in the internal memory at the recordnumber <n>.Parameter: <n> - phonebook recordNote: if parameter <n> is omitted then all the internal records are shown.Read commandWrite commandTest commandExampleReferenceSW release Version A2.4.1.8  +GMI - request manufacturer identification+GMI – request manufacturer identificationExecute commandAT+GMI Returns the manufacturer identification.Read commandWrite commandTest commandExampleReference V.25terSW release Version A2.4.1.9  +GMM - request model identification+GMM – request model identificationExecute commandAT+GMM Returns the model identification.Read commandWrite commandTest commandExampleReference V.25terSW release Version A
Page 43 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.1.10  +GMR - request revision identification+GMR – request revision identificationExecute commandAT+GMR Returns the software revision identification.Read commandWrite commandTest commandExampleReference V.25terSW release Version A2.4.1.11  +GCAP - request capabilities list+GCAP – request capabilities listExecute commandAT+GCAP Returns the equipment supported command set list.Read commandWrite commandTest commandExampleReference V.25terSW release Version A2.4.1.12  +GSN - request serial number+GSN – request serial numberExecute commandAT+GSN Returns the device board serial number.Note: The number returned is not the IMSI, it is only the board numberRead commandWrite commandTest commandExampleReference V.25terSW release Version A
Page 44 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.1.13  &V - display current configuration & profile&V – display current configuration & profileExecute commandAT&V Returns all the configuration parameters settings.Read commandWrite commandTest commandExample AT&VDTE SPEED                                   : 19200DTE FORMAT                               : 8N1CELLULAR PHONE                     : GSM TELIT: OperativeGSM DATA MODE                       : \N4=Not TrasparentAUTOBAUD                                  : +IPR0=YESCOMMAND ECHO                       : E1=YESRESULT MESSAGES                   : Q0=YESVERBOSE MESSAGES                : V1=YESEXTENDED MESSAGES             : X1=YESECM TYPE MESSAGES               : \V0=NOLINE SPEED                                  : F8=9600CONSTANT DTE SPEED             : \J0=YESFLOW CONTROL OPTIONS       : &K3=HW bidirect.ERROR CORRECTION MODE    : \N4=RLPCTS (C106) OPTIONS                   : &B2=OFF while disc.DSR (C107) OPTIONS                  : &S3=PHONE ready->ONDTR (C108) OPTIONS                  : &D0=ignoredDCD (C109) OPTIONS                  : &C1=follows carrierRI (C125) OPTIONS                      : \R1=OFF dur. off-hkC108/1 OPERATION                     : &D4=NOPOWER SAVING ON DTR           : +CFUN:1=NOCALL ABORT                                : YESDEFAULT PROFILE                     : &Y0=user profile 1OKReference V25terSW release Version A
Page 45 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.1.14  &V0 - display current configuration & profile&V0 – display current configuration & profileExecute commandAT&V0 Returns all the configuration parameters settings.Note: this command is the same as &V, it is included only forbackwards compatibility.Read commandWrite commandTest commandExampleReferenceSW release Version A2.4.1.15  &V1 - display S registers values&V1 – display S registers valuesExecute commandAT&V1 Returns the value of the S registers in decimal and hexadecimal value in theformat:REG     DEC     HEX<reg>    <dec>  <hex>where<reg> - S register number (0 .. 52)<dec> - current value in decimal notation<hex> - current value in hexadecimal notationRead commandWrite commandTest commandExampleReferenceSW release Version A
Page 46 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.1.16  &V2 - display last connection statistics&V2 – display last connection statisticsExecute commandAT&V2 Returns the last connection statistics & connection failure reason.Read commandWrite commandTest commandExampleReferenceSW release Version A2.4.1.17 \V - single line connect message\V – Single line connect messageExecute commandAT\V <n> Set single line connect message.Parameter:<n> = 0 - off<n> = 1 onRead commandWrite commandTest commandExampleReferenceSW release Version A
Page 47 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.1.18  %L - report line signal level%L – report line signal levelExecute commandAT%L Reports the line signal level.Note: Since on mobile phone there's no line connection, command isincluded only for compatibility and returns only OK.To check signal strength (level) use the +CSQ command.Read commandWrite commandTest commandExampleReferenceSW release Version A2.4.1.19  %Q - report line quality%Q – report line qualityExecute commandAT%Q Reports the line quality indicator.Note: Since on mobile phone there's no line connection, command isincluded only for compatibility and returns only OK.To check signal quality use the +CSQ command.Read commandWrite commandTest commandExampleReferenceSW release Version A
Page 48 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.2  DTE - modem interface control2.4.2.1  E - command echoE – command echoExecute commandRead commandWrite commandATE <n> Controls the command echo response of the device, enabling or disabling theecho.Parameter:  <n> = 0  - disables command echo, hence after this command the onlycharacters received by DTE are the responses to commands sent to device.<n> = 1 -  enables command echo (default) , hence command sent to thedevice are echoed back to the DTE before the response is given.Test commandExampleReference V25terSW release Version A2.4.2.2  Q - quiet resut codesQ – quiet result codesExecute commandRead commandWrite commandATQ <n> Enables or disables the result codes.Parameter:<n> = 0 - enables result codes<n> = 1 - disables result codesNote: After disabling result codes with ATQ1, the device does not return aresponse to commands (usually OK), but command are executed anyway.Test commandExampleReference V25terSW release Version A
Page 49 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.2.3  V- result code formV – result code formExecute commandRead commandWrite commandATV <n> Sets the result code format.Parameter:<n> = 0 set the short format (terse) return codes are numbers 0-9.<n> = 1 set the long form (verbose) return codes.Note: Line feed is not issued before a short format result code.Test commandExampleReference V25terSW release Version A2.4.2.4  X - extended result codesX – extended result codesExecute commandRead commandWrite commandATX <n> Selects the result code messages subset used by the modem to inform theDTE of the result of the commands.Parameter:<n> = 0 - send only OK, CONNECT, RING, NO CARRIER, ERROR, NOANSWER results. Busy tones reporting is disabled.<n> = 1,2,3,4  - reports all messages (default).Test commandNote For complete control on CONNECT response message see also +DRcommand.Reference V25terSW release Version A
Page 50 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.2.5  I - Request identifier and software checksumI –  request identifier and software checksumExecute commandRead commandWrite commandATI <n> Returns the identifier and a software checksum.Parameter:<n> = 0 numerical identifier.<n>  = 1 GM862-PCS checksum<n>  = 2 checksum check result<n>  = 3 manufacturer, software product code<n>  = 4 product name<n>  = 5 DOB versionTest commandExampleReference V25terSW release Version A2.4.2.6  &C - data carrier detect (DCD) control&C – Data carrier detect (DCD) controlExecute commandRead commandWrite commandAT&C <n> Controls the RS232 DCD output behaviour.Parameter:<n> = 0 DCD remains high always.<n> = 1 DCD follows the Carrier detect status: if carrier is detected DCD ishigh, otherwise DCD is low. (default)Test commandExampleReference V25terSW release Version A
Page 51 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.2.7  &D - data terminal ready (DTR) control&D – data terminal ready (DTR) controlExecute commandRead commandWrite commandAT&D <n> Controls the GM862-PCS behaviour to the RS232 DTR transitions.Parameter:<n> = 0 DTR transitions are ignored.<n> = 1 when the GM862-PCS is connected, the high to low transition ofDTR pin sets the device in command mode, the current connection is NOTclosed.<n> = 2 when the GM862-PCS is connected , the high to low transition ofDTR pin sets the device in command mode and the current connection isclosed.Note: if AT&D2 command is issued, the device does not answer to incomingcalls if DTR is low, even if ATA command is given.Test commandExampleReference V25terSW release Version A2.4.2.8  &K - flow control&K – flow controlExecute commandRead commandWrite commandAT&K <n>Controls the RS232 flow control behaviour.Parameter.<n> = 0 – disabled<n> = 1 - only CTS active, Hardware mono-directional<n> = 2 - XON/XOFF software mono direction<n> = 3 - RTS/CTS active, Hardware bi-directional (default)<n> = 4 - XON/XOFF, Software bi-directional with filtering<n> = 5 - XON/XOFF, Software bi-directional without filtering (PassThrough)<n> = 6 - RTS/CTS active, Hardware bi-directional & softwareXON/XOFF (bi-directional)  with filteringTest commandExampleReferenceSW release Version A
Page 52 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.2.9  &S - data set ready (DSR) control&S – data set ready (DSR) controlExecute commandRead commandWrite commandAT&S <n> Controls the RS232 DSR pin behaviour:n = 0 - always ONn = 1 - follows the GSM traffic channel indication.n = 2 - ON when connectedn = 3 - ON when device is ready to receive commandsNote:  if option 1 is selected then DSR is tied up when the device receivesfrom the network the GSM traffic channel indication.Test commandExampleReference V25terSW release Version A
Page 53 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.2.10  \R - ring (RI) control\R – ring (RI) controlExecute commandRead commandWrite commandAT\R <n> controls the RING output pin behaviour.Parameter:<n> = 0 -  RING on during ringing and further connection<n> = 1 – RING on during ringing<n> = 2 - RING follows the ring signalNote:  to check the ring option status use the &V command.Test commandExampleReferenceSW release Version A2.4.2.11  +IPR - fixed DTE interface rate+IPR – fixed DTE interface rateExecute commandRead commandAT+IPR? Returns the current value of +IPR parameter.Write commandAT+IPR = <rate> Specifies the DTE speed at which the device accepts commandsduring command mode operation, it may be used to fix the DTE-DCE interface speed.Parameter:<rate> = 0/300/1200/2400/4800/9600/19200/38400/57600/115200If <rate> is unspecified or set to 0, then automatic speed detection is enabledand also character format (see +ICF) is set to auto-detect.If <rate> is specified and not 0, DTE-DCE speed is fixed at thatspeed, hence no speed auto-detection (autobauding) is enabled.Test commandAT+IPR=? Returns the supported serial port speed list.ExampleReference V25terSW release Version A
Page 54 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.2.12 +IFC - DTE - DTA flow control+IFC – DTE-DTA flow controlExecute commandRead commandAT+IFC? Returns active flow control settings.Write commandAT+IFC = <by_te>, <by_ta>ResponseSelects the flow control behavior of the serial port in bothdirections: from DTE to DTA (<by_ta> option) and from DTA toDTE (<by_te>)Parameter:<by_te> - flow control option for the data received by DTE,<by_ta> - flow control option for the data sent by DTA<by_te> = 0 - flow control None<by_te> = 1 - XON/XOFF filtered<by_te> = 2 - C105 (RTS)<by_te> = 3 - XON/XOFF not filtered<by_ta> = 0 - flow control None<by_ta> = 1 - XON/XOFF<by_ta> = 2 - C106 (CTS)Note: This command is equivalent to &K command.Test commandAT+IFC=?ResponseReturns all supported values of  the parameters <by_te> and<by_ta>.ExampleReference V25terSW release Version A
Page 55 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.2.13 +ILRR - DTE - modem rate reporting+ILRR – DTE-modem rate reportingExecute commandRead commandAT+ILRR? Returns active setting of port speed rate reporting information.Write commandAT+ILRR = <n> Controls whether or not the +ILRR:<rate> information text istransmitted from the GM862-PCS to the DTE.Parameter:<n> = 0 - local port speed rate reporting disabled<n> = 1 - local port speed rate reporting enabledNote: this information if enabled is sent upon connection.Test commandAT+ILRR=? Returns all supported values of  the parameter <n>ExampleReference V25terSW release Version A
Page 56 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.2.14 +ICF - DTE - modem character format+ICF – DTE-modem character formatExecute commandRead commandAT+ICF? Returns current value of the character format.Write commandAT+ICF = <format>[,<parity>] Defines the asynchronous character format to be used whenautobauding is disabled.Parameter:<format> = 0..5, < parity> = 0/1AT+ICF = 0 - auto detectAT+ICF = 1 - 8N2AT+ICF = 2,0 - 8O1AT+ICF = 2,1 - 8E1AT+ICF = 3 - 8N1AT+ICF = 5,0 - 7O1AT+ICF = 5,1 - 7E1Note: the character format is defined as: number of bit per char,parity bit and stop bit; where parity can be None, Odd andEven. E.g. 8E1 means 8 bit per char with the even parity bitand 1 stop bit.Test commandAT+ICF=? Returns all supported values of  the parameters <format> and<parity>ExampleReference V25terSW release Version A
Page 57 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.3  Call Control2.4.3.1 D - dialD – dialExecute commandATD <number>Starts a call to the phone number given as parameter.Parameter: <number> - phone number to be dialledNote: The call is a data call or voice call depending on +FCLASS setting. IfAT+FCLASS=8 command was issued before calling then the call will bedone as a voice call, instead if AT+FCLASS=0 command was issued the callwill be a data one. The default value of +FCLASS is 0 hence calls are bydefault data ones.The numbers accepted are 0-9 and *,#,”A”, ”B”, ”C”, ”D”,”+”.For backwards compatibility with landline modems modifiers “T”, ”P”, ”R”,”,”, ”W”, “!”, “@” are accepted  but  have no effect.ATD <number> ; Issues a VOICE call to the number given regardless of the current value of theparameter +FCLASS, which remains unaffected.Parameter: <number> - phone number to be dialled.ATD <n> [;] Issues a call (VOICE if ";" modifier is added to the end of the command) tothe number stored in the GM862-PCS internal phonebook position number<n>.Parameter: <n> - internal phonebook position to be calledATD> <n> [;] Issues a call (VOICE if ";" modifier is added to the end of the command)  tothe number stored in the SIM phonebook in the record number <n>.Parameter: <n> - SIM phonebook position to be calledATDL Issues a call to the last number dialled.ATDS=<nr> Issues a call to the internally stored number at the position <nr>. ( Seecommands &N and &Z)ATD<n> I [;] Issues a call [voice if ; is added] overwriting the CLIR setting in order to hidethe CLI to the called party for the current call only.ATD<n> i [;] Issues a call [voice if ; is added] overwriting the CLIR setting in order to showthe CLI to the called party for the current call only.ATD<n> G[;]ATD<n>g[;]Issues a call [voice if ; is added] checking the CUG supplementary service forthe current call. Refer to +CCUG command.ATD*<gprs_sc>[*<addr>][*[<L2P>][*[<cid>]]]]#This command is specific of GPRS functionality and causes the MT toperform whatever actions are necessary to establish communication betweenthe TE and the external PDN.Parameters:<GPRS_SC> -  (GPRS Service Code) a digit string (value 99) which identifiesa request to use the GPRS<addr> - string that identifies the called party in the address space applicableto the PDP.
Page 58 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1D – dial<L2P>: a string which indicates the layer 2 protocol to be used (see+CGDATA command). For communications software that does not supportarbitrary characters in the dial string, the following numeric equivalents shallbe used:1 - PPPOther values are reserved and will result in an ERROR response to the setcommand.<cid>: a digit string which specifies a particular PDP context definition (see+CGDCONT command).Read commandWrite commandTest commandExampleReference V25ter.SW release Version A
Page 59 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.3.2  T - set tone dialT – set tone dialExecute commandATT It has no effect is included only for backward compatibility with landlinemodems.Read commandWrite commandTest commandExampleReference V25ter.SW release Version A2.4.3.3  P - set pulse dialP – set pulse dialExecute commandATP It has no effect is included only for backward compatibility with landlinemodems.Read commandWrite commandTest commandExampleReference V25ter.SW release Version A2.4.3.4  A - answerA – answerExecute commandATA It is used to answer to an incoming call if automatic answer is disabled.Note: This command MUST be the last in the command line and must befollowed immediately by a <CR> character.Read commandWrite commandTest commandExampleReference V25ter.SW release Version A
Page 60 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.3.5 A/ - Last command automatic repetitionA/ – last command automatic repetitionExecute commandA/ It is used to execute again the last received command.This command works only at fixed IPR.Note: This command has been substituted with AT#/ command.           Refer to #/ command reference.Read commandWrite commandTest commandExampleReferenceSW release Version A2.4.3.6 H - disconnectH - disconnectExecute commandATH It is used to close the current conversation (voice, data or fax).Note: When a data conversation is active the device is in on-line modecommands are not sensed, instead characters are sent to the otherinterlocutor. To issue this command you  must be in command modeoperation, hence escape sequence (see register S2) may be required beforeissuing this command, otherwise if &D1 option is active, DTR pin should betied low to return in the command mode.When a voice call is active, no escape sequence is needed.Read commandWrite commandTest commandExampleReference V25ter.SW release Version A
Page 61 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.3.7  O - return to On Line ModeO – return to on line modeExecute commandATO It is used return to On-line mode from command mode. If there's noconnection active returns ERROR.Note: After the issue of this command, if the device is in conversation, tosend other commands to the device you must return to command mode byissuing the escape sequence or lowering DTR if &D1 option is active.Read commandWrite commandTest commandExampleReference V25ter.SW release Version A2.4.3.8  &G - guard tone&G – guard toneExecute commandAT&G It is has no effect is included only for backward compatibility with landlinemodems.Read commandWrite commandTest commandExampleReferenceSW release Version A
Page 62 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.3.9  &P - pulse dial make/break ratio&P – pulse dial make/break ratioExecute commandAT&P It is has no effect is included only for backward compatibility with landlinemodems..Read commandWrite commandTest commandExampleReferenceSW release Version A2.4.4  Modulation control2.4.4.1  +MS - modulation control+MS – modulation controlExecute commandRead commandWrite commandAT+MS = <modulation>, <automode>,<min_speed>, <max_speed> This command has no effect is included only forbackward compatibility with landline modems.Parameter:<modulation> =V21 / V22 / V22B / V23C / V32 / V34<automode> = 0/1<min_speed> = 0<max_speed> = 300-14400Note: to change modulation requested use +CBSTcommand.Test commandExampleReferenceSW release Version A
Page 63 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.4.2 %E - enable/disable line quality monitor and auto retrain or fallback /fallforward%E – enable/disable line quality monitor and auto retrain or fallback/fallforwardExecute commandAT%E It has no effect is included only for backwardcompatibility with landline modems.Read commandWrite commandTest commandExampleReferenceSW release Version A
Page 64 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.5  Compression control2.4.5.1  +DS - set data compression+DS – set data compressionExecute commandRead commandAT+DS? Returns current value of the data compression parameter.Write commandAT+DS = <n> Sets the V42 compression parameter.Parameter:<n> = 0 - no compression  <n> = 1 - compression enabledNote: The only value supported is 0 - no compressionTest commandAT+DS=? Returns all supported values of the parameter nExampleReference V25terSW release Version A2.4.5.2 +DR - data compression reporting+DR – data compression reportingExecute commandRead commandWrite commandAT+DR = <n> Controls the data compression reporting upon connection.Parameter:<n> = 0 no data compression reporting is   displayed at the connection<n> = 1 a data compression report message is sent by the device uponconnectionTest commandExampleReference V25terSW release Version A
Page 65 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.6 Break control2.4.6.1  \B - transmit break to remote\B – transmit break to remoteExecute commandRead commandWrite commandAT\B It has no effect is included only for backward compatibility withlandline modemsTest commandExampleReferenceSW release Version A2.4.6.2  \K - break handling\K – break handlingExecute commandRead commandWrite commandAT\K<n>ResponseIt has no effect is included only for backward compatibility withlandline modems<n> = 1.. 5Test commandExampleReferenceSW release Version A
Page 66 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.7  S parameters2.4.7.1  S0 - number of rings to auto answerS0 – number of rings to auto answerExecute commandRead commandATS0? Returns the current value of S0 parameter.Write commandATS0 = <n> Sets the number of rings required before device automaticallyanswers an incoming call.Parameter:<n> = 0-255<n> = 0 auto answer disabledTest commandExampleReference V25terSW release Version A2.4.7.2  S1 - ring counterS1 – ring counterExecute commandRead commandATS1? S1 is incremented each time the device detects the ring signal ofan incoming call. S1is cleared if no ring occur over an eightseconds interval.This command returns the value of this parameter.Write commandTest commandExampleReferenceSW release Version A
Page 67 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.7.3  S2 - escape characterS2 – escape characterExecute commandRead commandWrite commandATS2 = <char> S2 holds the decimal value of the ASCII character used as escapecharacter. This command sets this character equal to <char>.Parameter: <char> - escape character 0-255Note: The escape sequence consists of three escape characterspreceded by n ms of idle and followed by m ms of idle.Test commandExampleReferenceSW release Version A2.4.7.4  S3 - carriage return characterS3 – carriage return characterExecute commandRead commandWrite commandATS3 = <char> Sets the command line and result code terminator character indecimal ASCII.Parameter: <char> - carriage return character 0-127Note: Default 13 (Carriage Return)Test commandExampleReference V25terSW release Version A
Page 68 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.7.5  S4 - line feed characterS4 – line feed characterExecute commandRead commandWrite commandATS4 = <char> Sets the character recognized as line feed character.Parameter: <char> - line feed character 0-127Note: Default 10 (Line Feed).  The line feed character is outputafter carriage return character if verbose result codes are used( V1 option used ).Test commandExampleReference V25terSW release Version A2.4.7.6  S5 - backspace characterS5 – backspace characterExecute commandRead commandWrite commandATS5 = <char> Sets the decimal ASCII character that is recognized as backspacecharacter.Parameter: <char> - backspace character 1-127Note: Default 8 ( backspace )Test commandExampleReference V25terSW release Version A
Page 69 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.7.7  S7 - wait time for carrier, silence or dial toneS7 – wait time for carrier, silence or dial toneExecute commandRead commandWrite commandATS7 = <sec> S7 sets the length of time in seconds that the device will wait forcarrier before hanging up the call. The timer is started when thedevice finishes dialing (originate), or 2 seconds after going off-hook.Parameter: <sec> - 1-255Note: Default is 60 secondsTest commandExampleReference V25terSW release Version A2.4.7.8  S10 - lost carrier to hang up delayS10 – lost carrier to hang up delayExecute commandRead commandWrite commandATS10 = <time> S10 defines the maximum time allowed to a carrier loss beforedisconnecting.Parameter: <time> - tenth of seconds  1-255Note: default is 50 (5 seconds).Test commandExampleReference V25terSW release Version A
Page 70 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.7.9  S12 - escape prompt delayS12 – escape prompt delayExecute commandRead commandWrite commandATS12 = <time> Defines the guard time of silence before and after the escapesequence in order to accept it as a valid one.Parameter: <time> - 20-255 fiftieth of secondsNote: default  is 50 (1 second )Test commandExampleReferenceSW release Version A2.4.7.10  S25 - delay to DTR offS25 –delay to DTR offExecute commandRead commandWrite commandATS25 = <time> Defines how long the DTR must be off to consider the high tolow transition as a valid one.Parameter: <time> -  1-255 hundredth of secondsNote: default  is 5 ( 5 hundredth of second)Test commandExampleReferenceSW release Version A
Page 71 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.4.7.11  S30 - disconnect inactivity timerS30 –disconnect inactivity timerExecute commandRead commandWrite commandATS30 = <min> Defines the inactivity timeout timer value in minutes. The Devicedisconnects if no characters are exchanged for a time period of atleast S30 minutes.Parameter:<min> -  0-127 minutes<min> = 0  - means inactivity timer disabled, hence nodisconnect on inactivity feature is enabled.Note: Default is 0Test commandExampleReferenceSW release Version A2.4.7.12 S38 - delay before forced hang upS38 –delay before forced hang upExecute commandRead commandWrite commandATS38 = <sec> Defines the time in seconds that the device waits after a hang upcommand for transmit buffer to be emptied. 255 value means thatdisconnecting is done only after complete buffer upload.Parameter: <sec> - 0-255 sNote: Default is 20 sTest commandExampleReferenceSW release Version A
Page 72 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5 ETSI GSM 07.07 AT Commands2.5.1 General2.5.1.1  +CGMI - request manufacturer identification+CGMI – request manufacturer identificationExecute commandAT+CGMI Returns the device manufacturer identification code.Read commandWrite commandTest commandExampleReference GSM 07.07SW release Version A2.5.1.2  +CGMM - request model identification+CGMM – request model identificationExecute commandAT+CGMM Returns the device model identification code.Read commandWrite commandTest commandExampleReference GSM 07.07SW release Version A2.5.1.3  +CGMR - request revision identification+CGMR – request revision identificationExecute commandAT+CGMR Returns device software revision number.Read commandWrite commandTest commandExampleReference GSM 07.07SW release Version A
Page 73 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.1.4  +CGSN - request product serial number identification+CGSN – request product serial number identificationExecute commandAT+CGSN Returns the product serial number, identified as the IMEI of themobile.Read commandWrite commandTest commandExampleReference GSM 07.07SW release Version A2.5.1.5  +CSCS - select TE character set+CSCS – select TE character setExecute commandRead commandAT+CSCS? Returns the current value of the active character set.Write commandAT+CSCS <chset> Sets the current character set used by the device.Parameter: <chset> = "IRA" - char setNote: The only character set supported yet is theITU–T.50 ( IRA)Test commandAT+CSCS=? Returns the supported values of the parameter chset. Yet onlyIRA is supported.ExampleReference GSM 07.07SW release Version A
Page 74 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.1.6  +CIMI - request international mobile subscriber identity (IMSI)+CIMI – request international mobile subscriber identify (IMSI)Execute commandAT+CIMI Returns the value of the Internal Mobile Subscriber Identitystored in the SIM.Note: A SIM card must be present in the SIM card housing, elsethe command returns ERROR.Read commandWrite commandTest commandExampleReference GSM 07.07SW release Version A
Page 75 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.2  Call control2.5.2.1  +CBST - select bearer service type+CBST – select bearer service typeExecute commandRead commandAT+CBST? Returns current value of the parameters <speed>,<name> and <ce>Write commandAT+CBST = <speed>,<name>, <ce> Selects the bearer service <name> with data rate <speed>, and theconnection element <ce> to be used when data calls are originated.Values may also be used during mobile terminated data call setup,especially in case of single numbering scheme calls (refer +CSNS).Parameters:The default values of the subparameters are manufacturer specific sincethey depend on the purpose of the device and data services provided byit. Not all combinations of these subparameters are supported. Thesupported values are:<speed>0 – autobauding (automatic selection of the speed)1 - 300 bps (V.21)2 - 1200 bps (V.22)3 - 1200/75 bps (V.23)4 - 2400 bps (V.22bis)6 - 4800 bps (V.32)7 - 9600 bps (V.32)14 - 14400 bps (V.34)65 - 300 bps (V.110)66 - 1200 bps (V.110)68 - 2400 bps (V.110 or X.31 flag stuffing)70 - 4800 bps (V.110 or X.31 flag stuffing)71 - 9600 bps (V.110 or X.31 flag stuffing)75 - 14400 bps (V110 or X.31 flag stuffing)<name>0 - data circuit asynchronous<ce>0 – transparent1 - non transparentDefault is +CBST =  7,0,1Test commandAT+CBST=? Returns the supported range of values of the parameters.ExampleReference GSM 07.07SW release Version A
Page 76 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.2.2  +CRLP - radio link protocol+CRLP – radio link protocolExecute commandRead commandAT+CRLP? Returns the current value of the RLP protocol parameters.Write commandAT+CRLP = <iws>,<mws>, <T1>, <N2>,<ver>Radio link protocol (RLP) parameters used when non-transparent datacalls are originated may be altered with  this command.Parameters:<iws> = 1...61 - IWF window Dimension<mws> = 1...61 - MS window Dimension<T1> = 39…255 – acknowledge timer (10 ms units).<N2> = 1…255 – retransmission attempts<ver> = 0 - protocol VersionThe default values are: 61,61,78,6,0Test commandAT+CRLP=? Returns supported range of values of the RLP protocol parameters.ExampleReference GSM 07.07SW release Version A
Page 77 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.2.3  +CR -  service reporting control+CR – service reporting controlExecute commandRead commandAT+CR? Returns current intermediate report settingWrite commandAT+CR = <mode> Controls whether or not intermediate result code +CR: <serv> is returnedfrom the TA to the TE. If enabled, the intermediate result code istransmitted at the point during connect negotiation at which the TA hasdetermined which speed and quality of service will be used, before anyerror control or data compression reports are transmitted, and before theintermediate result code CONNECT is transmitted.Parameter:  <mode><mode> = 0  - disables intermediate result code report<mode> = 1  - enables intermediate result code reportThis command replaces V.25ter [14] command Modulation ReportingControl +MR, which is not appropriate for use with a GSM terminal.The result code parameter <serv> has the meaning:ASYNC - asynchronous transparentSYNC - synchronous transparentREL ASYNC - asynchronous non-transparentREL SYNC - synchronous non-transparent.Test commandAT+CR=? Returns the supported range of values of the parameter <mode>.ExampleReference GSM 07.07SW release Version A
Page 78 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.2.4  +CEER - extended error report+CEER – extended error reportExecute commandAT+CEER Reports a information text regarding some error condition that mayoccur:- the failure in the last unsuccessful call setup (originating or answering)- the last call release- the last unsuccessful GPRS attach or unsuccessful PDP contextactivation,- the last GPRS detach or PDP context deactivation.Note: if none of this condition has occurred since power up then NoError condition is reportedRead commandWrite commandTest commandExampleReference GSM 07.07SW release Version A
Page 79 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.2.5  +CRC - cellular result codes+CRC – cellular result codesExecute commandRead commandAT+CRC? Returns current value of the parameter <mode>.Write commandAT+CRC = <mode>  Controls whether or not the extended format of incoming call indicationis used. When enabled, an incoming call is indicated to the TE withunsolicited result code  +CRING:<type> instead of the normal RING.Parameter:<mode> = 0 - disables extended format reporting<mode> = 1 - enables extended format reportingNote: On +CRING indication <type> parameter is the call type:<type> - call type:   ASYNC asynchronous transparent data   SYNC - synchronous transparent data   REL ASYNC - asynchronous non-transparent data   REL SYNC - synchronous non-transparent data   FAX - facsimile (TS 62)   VOICE - normal voice (TS 11)Test commandAT+CRC=? Returns supported values of the parameter <mode>.ExampleReference GSM 07.07SW release Version A
Page 80 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.3 Network service handling2.5.3.1  +CNUM - subscriber number+CNUM – subscriber numberExecute commandAT+CNUM Returns the subscriber number i.e. the phone number of the device that isstored in the SIM card.Note: the returned number format is:+CNUM: [<alpha>] , <number> , <type><alpha> - optional alphanumeric string associated to <number><number> - string containing the phone number in the format <type><type>- type of number:<type> = 145 - international numbering scheme (contains thecharacter "+")<type> = 129 - national numbering schemeRead commandWrite commandTest commandExampleReference GSM 07.07SW release Version A
Page 81 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.3.2  +CREG - network registration report+CREG – network registration reportExecute commandRead commandWrite commandAT+CREG = <mode>Enables/disables network registration reports depending on the parametermode.Parameter:<mode>   0 – disable network registration unsolicited result code   1 - enable network registration unsolicited result code   2 - enable network registration unsolicited result code with network         Cell identification dataIf  mode=1, network registration result code reports:+CREG: <stat><stat> =  0 -  not registered, ME is not currently searching a newoperator to register to<stat> =  1 – registered, home network<stat> =  2 - not registered, but ME is currently searching a newoperator to register to<stat> =  3 - registration denied<stat> =  4  -unknown<stat> =  5 - registered, roamingIf  mode=2, network registration result code reports:+CREG: <stat>[,<Lac>,<Ci>]where:<Lac> is the Local Area Code for the currently registered on cell<Ci> is the Cell Id for the currently registered on cellNote: <Lac> and <Ci> are reported only if mode=2 and the mobile isregistered on some network cell.Test commandAT+CREG? Reports the <mode> and <stat> parameter values in the format:+CREG: <mode>,<stat>[,<Lac>,<Ci>]Note: <Lac> and <Ci> are reported only if mode=2 and the mobile isregistered on some network cell.
Page 82 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+CREG – network registration reportExample ATOKat+creg?+CREG: 0,2 (the GM862-GPRS  is in network searching state)OKat+creg?+CREG: 0,2OKat+creg?+CREG: 0,2OKat+creg?+CREG: 0,2OKat+creg?+CREG: 0,1 (the GM862-GPRS is registered )OKat+creg?+CREG: 0,1OKReference GSM 07.07SW release Version A
Page 83 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.3.3  +COPS - operator selection+COPS – operator selectionExecute commandRead commandAT+COPS? Returns current value of <mode>,<format> and <oper>Write commandAT+COPS =[<mode>[,<format>[,<oper>]]]Forces an attempt to register the GSM network operator, <mode>parameter defines whether the operator selection is doneautomatically or  it is forced with <oper> parameter.Parameters:<mode> = 0 - automatic choice (the parameter <oper> will  beignored)<mode> = 1 - manual choice<mode> = 3 - set only <format> parameter (the parameter <oper>will be ignored)<format> = 0 - alphanumeric max length 16 digits<format> = 1 – alphanumeric short form<format> = 2 - Numeric 5 digits [country code (3) + network code(2)]<oper>: network operator in the <format> parameter definedformat.Note: if manual choice selection operator is not available no otheroperators will be chosen for registration.Test commandAT+COPS=? Returns the list of  network operators in the format:+COPS: ( <stat> ,<oper (in format=0)>,””,<oper (in format=2)> )where the new parameter stat defines the status of the operator:<stat> = 0 – unknown<stat> = 1 – available<stat> = 2 – current<stat> = 3 – forbiddenNote: since with this command a network scan is done, thiscommand may require some seconds before the output is given.ExampleReference GSM 07.07SW release Version A
Page 84 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.3.4  +CLCK - facility lock/ unlock+CLCK – facility lock/unlockExecute commandAT+CLCK =<fac>,<mode>[,<passwd>[,<class>]]It is used to lock or unlock  a ME o a network facility.Parameters:  <fac>:"SC" - SIM (PIN request) (device asks SIM password at power-up andwhen this lock command issued)"AO"- BAOC (Barr All Outgoing Calls)"OI" - BOIC (Barr Outgoing International Calls)"OX"- BOIC-exHC (Barr Outgoing International Calls except to HomeCountry)"AI" - BAIC (Barr All Incoming Calls)"IR" - BIC-Roam (Barr Incoming Calls when Roaming outside thehome country)"AB" - All Barring services (applicable only for <mode>=0)"AG" - All outGoing barring services (applicable only for <mode>=0)"AC" - All inComing barring services (applicable only for <mode>=0)"FD" - SIM fixed dialling memory feature (if PIN2 authentication hasnot been done during the current session, PIN2 is required as<passwd>)"PN" - network Personalisation"PU" - network subset Personalisation<mode>: defines the operation to be done on the facility<mode> = 0 - unlock facility<mode> = 1 - lock facility<mode> = 2 - query status  ( see below )<passwd>:  shall be the same as password specified for the facilityfrom the DTE user interface or with command Change Password+CPWD<class>: represents the class of information of the facility ( sum of bits)<class> = 1- voice (telephony)<class> = 2 - data (refers to all bearer services)<class> = 4 - fax (facsimile services)  ()Read commandAT+CLCK=<fac>,2 query the status of the facility <fac>;  returns+CLCK:<status>where  <status> defines the current status of thefacility:0 - not active ( locked )1 - active      ( unlocked )Note: For some facility the status is requested to the network, hence ifno network is available the command returns the ERROR message.
Page 85 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+CLCK – facility lock/unlockWrite commandTest commandAT+CLCK=? Reports all the facility supported by the device.ExampleReference GSM 07.07SW release Version A2.5.3.5  +CPWD - change facility password+CPWD – change facility passwordExecute commandAT+CPWD = <fac>,<oldpwd>, <newpwd> Changes the password for the facility lock function of the facility fac.Parameter: <fac>, <oldpwd>, <newpwd>Note: parameter <oldpwd> is the old password while <newpwd>  is thenew one.Read commandWrite commandTest commandExampleReference GSM 07.07SW release Version A
Page 86 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.3.6  +CLIP - calling line identification presentation+CLIP – calling line identification presentationExecute commandRead commandAT+CLIP? Returns the status of the supplementary service CLI in the format:+CLIP: <n>, <m>where:<n> = 0 - CLI presentation disabled<n> = 1 - CLI presentation enabled<m>: status if the CLIP service on the GSM network<m> = 0 - CLIP not provisioned<m> = 1 - CLIP provisioned<m> = 2 - unknown (e.g. no network is present )Note: This command issues a status request to the network, hence itmay take a few seconds to give the answer due to the time needed toexchange data with it.Write commandAT+CLIP = <n> Enables or disables the calling line identification supplementaryservice presentation  depending on the value of the parameter <n>.Parameters:   <n><n> = 0  - disables CLI indication<n> = 1  - enables CLI indicationIf enabled the device reports after each RING the response:+CLIP:<number>,<type>where:<number>: calling line number<type>- type of number:<type> = 145 - international numbering scheme (contains the character"+")<type> = 129 - national numbering schemeNote: The  command changes only the report behaviour of the device,it does not change CLI supplementary service setting on the network.Test commandAT+CLIP=? Returns the supported values of the parameter <n>ExampleReference GSM 07.07SW release Version A
Page 87 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.3.7  +CLIR - calling line identification restriction+CLIR – calling line identification restrictionExecute commandRead commandAT+CLIR? Reports the network & the device CLIR setting in the format:+CLIR:<n>,<m>where<n> is the facility status on the Mobile        0   –  CLIR facility according to CLIR service network status        1   –  CLIR facility active (CLI not sent)        2   –  CLIR facility not active (CLI sent)<m> is the facility status on the Network        0 - CLIR service not provisioned        1 - CLIR service provisioned permanently        2 - unknown (e.g. no network present, etc.)        3 - CLI temporary mode presentation restricted        4 - CLI temporary mode presentation allowedWrite commandAT+CLIR =<n>,<m>Refers to CLIR – service that allows a calling subscriber to enable or disablethe presentation of the CLI to the called party when originating a callaccording to the parameters <n> and <m> givenParameters:   <n>, <m><n> is the facility status on the Mobile        0   –  CLIR facility according to CLIR service network status        1   –  CLIR facility active (CLI not sent)        2   –  CLIR facility not active (CLI sent)<m> is the facility status on the Network        0 - CLIR service not provisioned        1 - CLIR service provisioned permanently        3 - CLI temporary mode presentation restricted        4 - CLI temporary mode presentation allowedNote: This  command set the default behaviour of the device in outgoing callsand of the network. The two settings should not be conflicting.Test commandAT+CLIR=? Reports the supported values of the parameter <n>.ExampleReference GSM 07.07SW release Version A
Page 88 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.3.8  +CCFC - call forwarding number and conditions+CCFC – call forwarding number and conditionExecute commandAT+CCFC =<reason>,<cmd>[,<number>[,<type>[,<class>][,,,<time>]]]Controls the call forwarding supplementary service. Registration,erasure, activation, deactivation, and status query are supported.Parameters:<reason> = 0 – unconditional<reason> = 1 - mobile busy<reason> = 2 - no reply<reason> = 3 - not reachable<reason> = 4 - all calls  (not with query command)<reason> = 5 - all conditional calls (not with query command)<cmd> = 0 – disable<cmd> = 1 - enable<cmd> = 2 - query status  (see below for further explanations)<cmd> = 3 – registration<cmd> = 4 – erasure<number>: phone number of forwarding address in format specified by<type> parameter<type>: type of address byte in integer format :145 - international numbering scheme (contains the character "+")129 - national numbering scheme<class>: is a sum of integers each representing a class of informationwhich the command refers; default 7 ( voice + data + fax )<class> = 1 - voice (telephony)<class> = 2 - data<class> = 4 - fax (facsimile services, from SW release C)<time>: is the time in seconds after which the call is diverted if "noreply" reason is chosen. Valid only for "no reply" reason.
Page 89 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+CCFC – call forwarding number and conditionRead commandAT+CCFC =<reason>,2,[number>[,<type>[,dopo<time>s]]]Queries the network for forwarding service settings on a specificreason. The result is in the form:+CCFC:<status>,<class>[,<number>[,<type>[,dopo <time>s]]]where:<status> = 0 - service not active<status> = 1 - service active (calls will be forwarded)<time>: - 1...30 when "no reply" option for reason is enabled orqueried, this gives the time in seconds to wait before call is forwarded,default value is 20.The other parameters are as seen before.Note: When querying the status of a network service (<cmd>=2) theresponse line for 'not active' case (<status>=0) should be returned only ifservice is not active for any <class>.Write commandTest commandAT+CCFC=? Reports supported values for the parameter <reason>.ExampleReference GSM 07.07SW release Version A
Page 90 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.3.9  +CCWA - call waiting+CCWA – call waitingExecute commandAT+CCWA =[<n>[,<cmd>[,<class>]]]Controls the call waiting indication supplementary service.Activation, deactivation, and status query are supported.Parameters:<n>: enables/disables call waiting indication reporting:<n> = 0 – disable<n> = 1 - enable<cmd> enables/disables or queries the service at network level:<cmd> = 0 - disable<cmd> = 1 – enable<cmd> = 2 - query status<class>: is a sum of integers each representing a class of informationwhich the command refers; default 7 ( voice + data + fax )<class> = 1 - voice (telephony)<class> = 2 - data<class> = 4 - fax (facsimile services)The response to the query command is in the form:+CCWA=<status>,<class>Where<status> represents the status of the service:<status> = 0 - inactive<status> = 1 - active<class> is the class of calls the service status refers to.Note: if parameter <cmd> is omitted then network is not interrogated.Note2: In the query command the class parameter must not be issued.Note3: The difference between call waiting report disabling(AT+CCWA = 0,1,7) and call waiting service disabling (AT+CCWA= 0,0,7) is that in the first case the call waiting indication is sent to thedevice by network but this last one does not report it  to the DTE;instead in the second case the call waiting indication is not generatedby the network. Hence the device results busy to the third party in the2nd case while in the 1st case a ringing indication is sent to the thirdparty.Note4: The command AT+CCWA=1,0 is a non sense and must not beissued.Read commandAT+CCWA? Reports the current value of the parameter <n>.Write commandTest command
Page 91 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+CCWA – call waitingAT+CCWA=? Reports the supported values for the parameter  <n>.ExampleReference GSM 07.07SW release Version A2.5.3.10  +CHLD - call holding services+CHLD – call holding servicesExecute commandAT+CHLD = <n> Controls the network call hold service. With this service it is possibleto disconnect temporarily a call and keep it suspended while it isretained by the network, contemporary it is possible to connectanother party or make a multiparty connection.The action of the command depends on the value of the parameterParameter:<n> = 0   Releases all pending calls<n> = 1   Releases all active calls (if present), and accepts orreconnects the pending or waiting call<n> = 2   Suspends (into pending status)  the active call and acceptsor reconnects the waiting or pending call.<n> = 3   NOT SUPPORTEDNote: ONLY for VOICE callsRead commandWrite commandTest commandExampleReference GSM 07.07SW release Version A
Page 92 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.3.11  +CUSD - unstructured supplementary service data+CUSD – unstructured supplementary service dataExecute commandAT+CUSD = <n>,[<str>] Enables /disables the unstructured service data reporting.Parameters:<n>: is used to disable/enable the presentation of an unsolicited resultcode: +CUSD: <m>[,<str>,<dcs>] to the TE.<n>:<n> = 0 - disable the result code presentation in the DTA<n> = 1 - enable the result code presentation in the DTA<dcs> indicates which alphabet is used (Data Coding Scheme),refer tocommand Select TE Character Set +CSCS<str> - USSD-string (when <str> parameter is not given, network isnot interrogated):- if TE character set other than "HEX": ME/TA converts GSMalphabet into current TE character set according to rules of GSM07.05- if TE character set is "HEX": ME/TA converts each 7-bit characterof GSM alphabet into two IRA character long hexadecimal number(e.g. character ? (GSM 23) is presented as 17 (IRA 49 and 55))-if<dcs> indicates that 8-bit data coding scheme is used: ME/TAconverts each 8-bit octet into two IRA character long hexadecimalnumber (e.g. octet with integer value 42 is presented to TE as twocharacters 2A (IRA 50 and 65))<m>:<m> = 0 - no further user action required, hence network initiatedUSSD-Notify, or no further information needed after mobile initiatedoperation.<m> = 1 - further user action required, hence network initiatedUSSD-Request, or further information needed after mobile initiatedoperation<m> = 2 - USSD terminated by the network<m> = 3 - other local client has responded<m> = 4 - operation not supported<m> = 5 - network time outNote: only mobile initiated operations are supported.Warning: In case of successful mobile initiated operation, DTA waitsthe USSD response from the network and sends it to the DTE beforethe final result code. This will block the AT command interface forthe period of the operation.
Page 93 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+CUSD – unstructured supplementary service dataRead commandAT+CUSD? Reports the current value of the parameter <n>Write commandTest commandAT+CUSD=? Reports the supported values for the parameter <n>:<n> = 0 - result code presentation in the TA disabled<n> = 1 - result code presentation in the TA enabledExampleReference GSM 07.07SW release Version A
Page 94 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.3.12  +CAOC - advice of charge+CAOC – advice of chargeExecute commandAT+CAOC = <mode> Controls the advise of charge service; the command also includes thepossibility to enable an unsolicited event reporting of the CCMinformation.If unsolicited reporting is enabled DTE sends the result code+CCCM: <acm>when the CCM value changes, but not more than every 10 seconds.<acm> - accumulated call meter value hexadecimal representation (3byte)Parameter:<mode> = 0 - ACM (Accumulated Call Meter) read request<mode> = 1 - disables unsolicited ACM reporting<mode> = 2 - enables unsolicited ACM reportingNote: +CAOC command uses the ACM  of the device internalmemory, not the ACM stored in the SIM. The difference is that theinternal memory ACM is reset at power up, while the SIM ACM isreset only on user request. Advice of Charge values stored in the SIM(ACM, ACMmax, PUCT) can be accessed with commands +CACM,+CAMM and +CPUC.Read commandAT+CAOC? Reports the value of ACM in the format:  +CAOC: xxxxxx.Write commandTest commandAT+CAOC=? Reports the supported values for <mode> parameter.ExampleReference GSM 07.07SW release Version A
Page 95 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.3.13  +CLCC -  list current calls+CLCC – list current callsExecute commandAT+CLCC Reports the list of current calls active and their characteristics bysending the report+CLCC:<id>,<dir>,<stat>,<mode>,<mpty>[,<number>,<type>]for each active call,where:<id> - call identification number<dir> - call direction       0 - mobile originated call       1 - mobile terminated call<stat> - state of the call       0 - active       1 - held       2 - dialing (MO call)       3 - alerting (MO call)       4 - incoming (MT call)       5 - waiting (MT call)<mode> - call type       0 – voice       1 – data       2 – fax       9 - unknown<mpty> - multiparty call flag       0 - call is not one of multiparty (conference) call parties       1 - NOT SUPPORTED<number>: phone number in format specified by <type><type>: type of phone number byte in integer format     145 - international numbering scheme (contains the character "+")      129 - national numbering schemeNote: If no call is active then only OK message is sent. This commandis useful in conjunction with command +CHLD to know the variouscall status for call holding.Read commandWrite commandTest commandExampleReference GSM 07.07SW release Version A
Page 96 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.3.14  +CSSN – SS Notification+CSSN – SS notificationExecute commandRead commandWrite commandAT+CSSN = <n>, <m> Enable/disable the supplementary service related network initiatednotifications, during the origin of outgoing calls (+CSSI) andincoming calls (+CSSU)Parameters:<n>: sets the +CSSI result code presentation status     0 disable     1 enable<m>: sets the +CSSU result code presentation status     0 disable     1 enableTest commandExampleReference GSM 07.07SW release Version A
Page 97 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.15.4.3.15       +CCUG – Closed User Group supplementary service control+CCUG – Closed User Group supplementary service controlExecute commandRead commandAT+CCUG? Reports the current value of the parameters in the format:+CCUG:  <n>,<index>,<info>Write commandAT+CCUG=<n>[,<index>[,<info>]] Enable/disable the CUG supplementary serviceParameters:<n>    0 - disables the temporary CUG settings for all the successive calls    1 - enables the temporary CUG settings for all the successive calls<index>     0...9  - CUG index     10     -  no index (preferential CUG taken from subscriber data)<info>      0 -  no information      1 - suppress Outgoing Access (OA)      2 - suppress preferential CUG      3 - suppress OA and preferential CUGTest commandAT+CCUG=? Reports the supported range of values for the parameters<n>,<index>, <info>ExampleReference GSM 07.07SW release Version A
Page 98 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.4  Mobile Equipment control2.5.4.1 +CPAS -  phone activity status+CPAS – phone activity statusExecute commandAT+CPAS reports the device status in the form+CPAS: <pas>where<pas> - phone activity status      0 - ready (Device allows commands from TA/TE)      1 - unavailable (Device does not allow commands from TA/TE)      2 - unknown (Device is not guaranteed to respond to instructions)      3 - ringing (Device is ready for commands from TA/TE, but theringer is active)      4 - call in progress (Device is ready for commands from TA/TE,but a call is in progress)Read commandAT+CPAS?same as Execute command.Write commandTest commandAT+CPAS=? Reports the supported range of values of  <pas>.Example ATD03282131321;OKAT+CPAS?+CPAS: 3 (the called phone is ringing)OKAT+CPAS?+CPAS: 3OKAT+CPAS?+CPAS: 4 (the called phone has answered to your call)OKATHOKReference GSM 07.07SW release Version A
Page 99 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.4.2  +CFUN Set phone functionality (Power Saving Management)+CFUN – power saving managementExecute commandRead commandAT+CFUN? reports the power saving status in the form:+CFUN: <fun>where<fun> - power saving status      1 - power saving disabled      5 - power saving enabledNote:  The phone functionality remains always FULL.Write commandAT+CFUN=<fun> Enables/disables the power saving function.If enabled it reduces the power consumption during the idle time, thusallowing a longer standby time with a given battery capacity.Parameters:<fun>: is the power saving function mode 1 - Mobile full functionality with power saving disabled (default) 5 - Mobile full functionality with power saving enabledNote: To place the telephone in power saving mode, other than to setthe <fun> parameter at value = 5, the line DTR (RS232) must be set toOFF. Once in power saving, the CTS line switch to the OFF status tosignal that the telephone is really in power saving condition.During the power saving condition, before sending any AT commandon the serial line, the DTR must be enabled and it must be waited forthe CTS (RS232) line to go in ON status.Until the DTR line is ON, the telephone will not return back in thepower saving condition.Note2: The power saving function does not affect the network behaviorof the GM862-GPRS, even during the power save condition themodule remains registered on the network and reachable for incomingcalls or SMS. If a call incomes during the power save, then the modulewill wake up and proceed normally with the unsolicited incoming callcodeTest commandExampleReference GSM 07.07SW release Version A
Page 100 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.4.3  +CPIN - enter PIN+CPIN – enter PINExecute commandRead commandAT+CPIN? Reports the PIN/PUK/PUK2 request status of the device in the form:+CPIN:<code>where <code> is the PIN/PUK/PUK2 request status code:         READY - device is not pending for any password        SIM PIN - device is waiting SIM PIN to be given        SIM PUK - device is waiting SIM PUK to be given        SIM PIN2 - device is waiting SIM PIN2 to be given; this <code>is returned only when the last executed command resulted in PIN2authentication failure (i.e. +CME ERROR: 17)        SIM PUK2 - device is waiting SIM PUK2 to be given; this<code> is returned only when the last executed command resulted inPUK2 authentication failure (i.e. +CME ERROR: 18)        PH-NET PIN - device is waiting network personalizationpassword to be given        PH-NETSUB PIN - device is waiting network subsetpersonalization password to be givenNote: Pin pending status at startup depends on PIN facility setting, tochange or query the default power up setting use theAT+CLCK=SC,<mode>, <pin> command.Write commandAT+CPIN =<pin>[,<newpin>] Sends to the device a password (SIM PIN, SIM PUK, PH-SIM PIN,etc.) which may be required to further operate the device.If the PIN required is SIM PUK or SIM PUK2, the <newpin> isrequired. This second pin, <newpin>,will replace the old pin in theSIM.The command may be used to change the SIM PIN by sending it withboth parameters <pin> and <newpin> when if PIN request is pending;if no PIN request is pending the command will return an error code andto change the PIN the command +CPWD must be used instead.Parameters: <pin>, <newpin>Note: the only commands which are accepted when device is pendingSIM PIN, SIM PUK, or PH-SIM are: +CGMI, +CGMM, +CGMR,+CGSN, D112; (emergency call), +CPAS, +CPIN.To check the status of the PIN request use the command AT+CPIN?Test command
Page 101 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+CPIN – enter PINExample AT+CMEE=1OKAT+CPIN?+CME ERROR: 10 (error because you have to insert the SIM)AT+CPIN?+CPIN: READY (this response is after you have inserted the SIM)OKReference GSM 07.07SW release Version A
Page 102 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.4.4  +CSQ- signal quality+CSQ – signal qualityExecute commandAT+CSQ Reports received signal quality indicators in the form+CSQ:<rssi>,<ber>where<rssi> - received signal strength indication        0 - 113 dBm or less        1 - 111 dBm        2...30 - 109dBm ... -53 dBm  /  2 dBm per step        31 - 51 dBm or greater        99 - not known or not detectable<ber> - bit error rate %         0 - less than 0.2 %         1 - 0.2% a 0.4%         2 - 0.4% a 0.8%         3 - 0.8% a 1.6%         4 - 1.6% a 3.2%         5 - 3.2% a 6.4%         6 - 6.4% a 12.8%         7 - more than 12.8%         99 - not known or not detectableNote: this command should be used instead of the AT%Q and AT%Lcommands, since GSM relevant parameters are the radio link ones andno line is present, hence %Q %L and have no meaning.Read commandWrite commandTest commandAT+CSQ=? Returns the supported range of values of the parameters <rssi>and<ber>.ExampleReference GSM 07.07SW release Version A
Page 103 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.4.5  +CPBS - select phonebook memory storage+CPBS – select phonebook memory storageExecute commandRead commandWrite commandAT+CPBS = <storage> Selects phonebook memory storage <storage>, which will be used byother phonebook commands.Parameter: <storage>    "SM" - SIM phonebook    "FD"  - SIM fixed dialling-phonebook (only phase 2/2+ SIM)    "LD"  - SIM last-dialling-phonebook (+CPBW and +CPBF are notapplicable for this storage)    "MC" - device missed (unanswered received) calls list (+CPBWand +CPBF are not applicable for this storage)    "RC" -  ME received calls list (+CPBW and +CPBF are notapplicable for this storage)Test commandExampleReference GSM 07.07SW release Version A
Page 104 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.4.6  +CPBR - read phonebook entries+CPBR – read phonebook entriesExecute commandRead commandWrite commandAT+CPBR =<index>[,<index2>] returns phonebook entries in locations number from <index1> to<index2> from the current phonebook memory storage selected with+CPBS. If<index2> is omitted, only location <index1> is returned.Parameters: <index>, <index2>The response format is:+CPBR: <index>,<number>,<type>,<name>where<index> - the current position number of the PB index (to see therange of values use +CPBR=?)<number> - the phone number stored in the format <type><type> - type of phone number byte in integer format   145 - international numbering scheme (contains the character "+")   129 - national numbering scheme<name> - the alphanumeric text associated to the number (e.g. nameof address)Note: If all queried locations are empty (but available), no informationtext lines will be returned, while if listing fails in an ME error, +CMEERROR: <err> is returned.Test commandAT+CPBR=? Returns the supported range of values of the parameters in the form+CPBR: (<minIndex> - <maxIndex>),<nlength>,<tlength>where<minIndex> - the minimum index number<maxIndex>- the maximum index number<nlength> - maximum number field length<tlength> - maximum name field lengthNote: remember to select the PB storage with +CPBS commandbefore issuing PB commands.ExampleReference GSM 07.07SW release Version A
Page 105 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.4.7  +CPBF - find phonebook entries+CPBF – find phonebook entriesExecute commandRead commandWrite commandAT+CPBF = <text> Issues a search for the phonebook records that have the text sub-stringat the start of the name field and returns a report in the form+CPBF: <index>,<number>,<type>,<name>where index, number, type and name have the same meaning than inthe command +CPBR report.If no PB records satisfy the search criteria then an ERROR message isreported.Parameter: <text>Note: text is NOT case sensitive and may or not be included in doublebrackets.Test commandAT+CPBF=? Reports the maximum lengths of fields <number> and<name> in the PB entry in the form:+CPBF: <max_number_length>,<max_name_length>ExampleReference GSM 07.07SW release Version A
Page 106 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.4.8  +CPBW - write phonebook entry+CPBW – write phonebook entryExecute commandRead commandWrite commandAT+CPBW =[<index>][,<number>[,<type>[,<name>]]]Stores at the position <index> a Phonebook record defined by<number>,<type> and <name> parametersParameters: <index>, <number>, <type>, <name><number> - the phone number in the format <type><type> - the type of number      145 - international numbering scheme (contains the character "+")      129 - national numbering scheme<name> - the text associated to the number.Note: If record number <index> already exists, it will be overwritten.If only <index> is given, the record number <index> is deleted.If <index> is omitted, the number <number> is stored in the first freephonebook location.Text in the <name> field  and number in the <number> field may ormay not be included in double brackets.Test commandAT+CPBW=? Reports the maximum lengths of fields <number> and <name> in thePB entry in the form:+CPBW: <max_number_length>,<max_name_length>ExampleReference GSM 07.07SW release Version A
Page 107 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.4.9  +CCLK - Clock Management+CCLK – Clock ManagementExecute commandRead commandAT+CCLK? Reports the current time stored in the internal Real Time Clock in theformat:+CCLK: <time>Write commandAT+CCLK = <time> Stores in the internal Real Time Clock  the current time defined by theparameter <time>Parameter:<time> - current time in the format : "yy/MM/dd,hh:mm:ss±zz"where:yy - yearMM - month (in digits)dd - dayhh - hourmm - minute±zz - time zone in quarter of an hour (difference between the GMT andthe local time)Test commandExample AT+CCLK="02/09/07,22:30:00+04"OKAT+CCLK?+CCLK: 02/09/07,22:30:25+4OKReference GSM 07.07SW release Version A
Page 108 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.4.10 +CALA - Alarm Management+CALA – Alarm ManagementExecute commandRead commandAT+CALA? Reports the current alarm time stored in the internal Real Time Clock,if present, in the format:+CALA: <time>,<n>,<type>[,<text>]Write commandAT+CALA = [<time>[,<n>[,<type>[,<text>]]]] Stores in the internal Real Time Clock the current alarm time andsettings defined by the parameters <time>, <n>,<type>,<text>.When the RTC time reaches the alarm time then the alarm starts, thebehaviour of the GM862-PCS depends upon the setting <type> and ifthe device was already ON at the moment when the alarm time hadcome.Parameter:<time> - current alarm time in the format : "yy/MM/dd,hh:mm:ss±zz"               as defined for +CCLK command.<type> - alarm behaviour type  0 - reserved  for other equipment use.  1 - the GM862-PCS simply wakes up fully operative as if theON/OFF pin had been pressed. If the device is already ON at thealarm time, then it does nothing.  2 - the GM862-PCS wakes up in "alarm mode" if at the alarm time itwas off, otherwise it remains fully operative. In both cases theGM862-PCS issues an unsolicited code every 3s:+ALARM: <text>Where <text> is the other +CALA parameter previously set.The device keeps on sending the unsolicited code every 3s until a#WAKE or #SHDN command is received or a 90s timeoutoccurs.  If the device is in "alarm mode" and it does not receivethe #WAKE command within 90s then it shuts down. (default)  3 - the GM862-PCS wakes up in "alarm mode" if at the alarm time itwas off, otherwise it remains fully operative. In both cases theGM862-PCS starts playing the alarm tone on the selected path forthe ringer (see command #SRP)The device keeps on playing the alarm tone until a #WAKE or#SHDN command is received or a 90s timeout occurs.  If thedevice is in "alarm mode" and it does not receive the #WAKEcommand within 90s then it shuts down. 4 -  the GM862-PCS wakes up in "alarm mode" if at the alarm time it
Page 109 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1was off, otherwise it remains fully operative. In both cases theGM862-PCS brings the pin GPIO6 high, provided its <direction>has been set to alarm output, and keeps it in this state until a#WAKE or #SHDN command is received or a 90s timeoutoccurs. If the device is in "alarm mode" and it does not receive the#WAKE command within 90s then it shuts down. 5 -  the GM862-PCS will make both the actions as for type=2 andtype=3. 6 -  the GM862-PCS will make both the actions as for type=2 andtype=4. 7 -  the GM862-PCS will make both the actions as for type=3 andtype=4.<n> = 0 - index of the alarm  The only value supported for <n> is 0.<text> - unsolicited alarm code text string        In the case that <type> is equal to 2 or 5 or 6, then the unsolicitedtext parameter <text> can be set by this parameter.Note: The "alarm mode" is indicated by hardware pin CTS to the ONstatus and DSR to the OFF status, while the "power saving" status isindicated by a CTS - OFF and DSR - OFF status. The normal operatingstatus is indicated by DSR - ON.During the "alarm mode" the device will not make any network scanand will not register to any network and therefore is not able to dial orreceive any call or SMS, the only commands that can be issued to theGM862-PCS in this state are the #WAKE and #SHDN, every othercommand must not be issued during this state.Test commandAT+CALA=? Reports the supported range of values for the parameters <time>,<n>,<type> and <text> maximum lengthExample AT+CALA="02/09/07,23:30:00+04"OKReference GSM 07.07SW release Version A
Page 110 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.4.11 +CALM - alert sound mode+CALM – alert sound modeExecute commandRead commandWrite commandAT+CALM = <mode> It is used to select the general alert sound mode of the device.Parameter:<mode> = 0 - normal mode<mode> = 1 - silent mode (no sound will be generated by the device)Note: if silent mode (1) is selected then incoming calls will not producealerting sounds but only the message RING or +CRING.Test commandAT+CALM=? Returns the supported values for the parameter <mode>.ExampleReference GSM 07.07SW release Version A2.5.4.12  +CRSL - ringer sound level+CRSL – ringer sound levelExecute commandRead commandAT+CRSL? Reports the current <level> setting of the call ringer in the format:+CRSL: <level>Write commandAT+CRSL = <level> It used to select the incoming call ringer sound level of the device.Parameter: <level> - ringer sound level<level> = 0 - Off<level> = 1 - low<level> = 2 - middle<level> = 3 - high<level> = 4 – progressiveTest commandAT+CRSL=?Reports <level> supported values range in the format:+CRSL: (0-4)ExampleReference GSM 07.07SW release Version A
Page 111 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.4.13 +CLVL - loudspeaker volume level+CLVL – loudspeaker volume levelExecute commandRead commandAT+CLVL? Reports the current <level> setting of the loudspeaker volume in theformat:   +CLVL: <level>Write commandAT+CLVL = <level> It used to select the volume of the internal loudspeaker audio output ofthe device.Parameter: <level> - loudspeaker volume varies between 0 (min) and10 (max).Test commandAT+CLVL=?Reports <level> supported values range in the format:+CLVL: (0-10)ExampleReference GSM 07.07SW release Version A2.5.4.14 +CMUT - microphone mute control+CMUT – microphone mute controlExecute commandRead commandAT+CMUT? Reports the selected microphone (internal/external) mute status in theformat:+CMUT: <n>Write commandAT+CMUT = <n>Enables/disables the muting of the microphone audio line dependingon n parameter valueParameter:<n > = 0 - microphone active<n > = 1 - microphone mutedNote: this command mutes/activates both microphone audio paths,internal mic and external mic.Test commandAT+CMUT=? Reports the supported values for <n> parameter.ExampleReference GSM 07.07SW release Version A
Page 112 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.4.15  +CACM - accumulated call meter+CACM – accumulated call meterExecute commandRead commandAT+CACM? Reports the current value of the SIM ACM in the format+CACM: <n>Note: the value <n> is in units whose price and currency is definedwith command +CPUCWrite commandAT+CACM = <pwd> Resets the SIM Accumulated Call Meter (ACM). Internal memoryCCM remains unchanged.Parameter: <pwd> - PIN2 passwordNote: to access this command PIN2 password is requiredTest commandExampleReference GSM 07.07SW release Version A2.5.4.16  +CAMM - accumulated call meter maximum+CAMM – accumulated call meter maximumExecute commandRead commandAT+CAMM? Reports the maximum value of ACM stored in SIM in the format:+CAMM : <acmmax>Write commandAT+CAMM =<acmmax>, <pwd> Sets the Advice of Charge related Accumulated Call Meter ACMmaximum value in SIM (see also +CACM command). This valuerepresents  the maximum number of home units allowed to beconsumed by the subscriber. When ACM  reaches <acmmax> valuefurther calls are prohibited. SIM PIN2 is required to set the value.Parameter:<acmmax>-  maximum number of units allowed to beconsumed<pwd>- PIN2 passwordNote: The <acmmax> = 0 value disables the feature.Test commandExampleReference GSM 07.07SW release Version A
Page 113 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.4.17  +CPUC - price per unit and currency table+CPUC – price per unit and currency tableExecute commandRead commandAT+CPUC? Reports the current values of <currency> and <ppu> parameters in theformat: +CACM : <currency>,<ppu>Write commandAT+CPUC =<currency>,<ppu>,<pwd>Sets the values of Advice of Charge related price per unit andcurrency table in SIM. The price per Unit currency tableinformation can be used to convert the home units (as used incommands +CAOC, +CACM and +CAMM) into currencyunits.Parameters:<currency> - three-character currency code string (e.g. LIT, USD,DEM etc..)<ppu> - price per unit string (dot is used as decimal separator) e.g.1989.27<pwd> - SIM PIN2Note: SIM PIN2 is required to set the values.Test commandExampleReference GSM 07.07SW release Version A
Page 114 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.5  Mobile equipment errors2.5.5.1  +CMEE - report mobile equipment error+CMEE – report mobile equipment errorExecute commandRead commandWrite commandAT+CMEE = <n> Enables/disables the report of result code. +CME ERROR: <err>as an indication of an error relating to the +Cxxx commands issued.When enabled, device related errors cause the +CME ERROR: <err>final result code instead of the default ERROR final result code.ERROR is anyway returned normally when the error message isrelated to syntax, invalid parameters, or DTE functionality.Parameter:<n> - enable flag<n> = 0 - disable +CME ERROR:<err>  reports, use only ERRORreport.<n> = 1 - enable +CME ERROR:<err>  reports, with <err> in numericformat<n> = 2 - disable +CME ERROR: <err>  reports, with <err> in verboseformatTest commandExampleReference GSM 07.07SW release Version A
Page 115 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.5.2  +CME ERROR: - ME error result codeThis is NOT a command, it is the error response to +Cxxx GSM 07.07 commands.Syntax: AT+CME ERROR:<err>Parameter: <err> - error code can be either numeric or verbose.<err> values:Numeric Format  Verbose Format0  phone failure1  no connection to phone2  phone-adaptor link reserved3  operation not allowed4  operation not supported5  PH-SIM PIN required6  NOT SUPPORTED7  NOT SUPPORTED10 SIM not inserted11  SIM PIN required12  SIM PUK required13  SIM failure14  SIM busy15  SIM wrong16  incorrect password17  SIM PIN2 required18  SIM PUK2 required20  memory full21  invalid index22  not found23  memory failure24  text string too long25  invalid characters in text string26  dial string too long27  invalid characters in dial string30  no network service31  network timeout32  network not allowed - emergency calls only40  network personalization PIN required41  network personalization PUK required42  network subset personalization PIN required43  network subset personalization PUK required44  service provider personalization PIN required45  service provider personalization PUK required46  corporate personalization PIN required47  corporate personalization PUK required100  unknown
Page 116 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.6  Voice Control (TIA IS-101)2.5.6.1  +VTS: - DTMF tones transmission+VTS – DTMF tones transmissionExecute commandRead commandWrite commandAT+VTS = <DTMF> Allows the transmission of DTMF tonesParameter:<DTMF> - a single ASCII character in the set 0-9, #,*,A-DNote: this commands operates in voice mode onlyTest commandAT+VTS=? Returns +VTS(),(),()ExampleReference GSM 07.07 / TIA IS-101SW release Version A
Page 117 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.7  Commands For GPRS2.5.7.1 +CGACT - PDP context activate or deactivate+ CGACT – PDP context activate or deactivateExecute commandRead commandAT+CGACT?Returns the current activation states for all the defined PDP contexts.Write commandAT+CGACT = <state>[,<cid>[, <cid>[,…]]]]The command is used to activate or deactivate the specified PDPcontext (s)Parameters:<state> - indicates the state of PDP context activation   0 - deactivated   1 - activated<cid> - a numeric parameter which specifies a particular PDP contextdefinition (see +CGDCONT command)Test commandAT+CGACT=?Reports information on the supported PDP context activation statesparameters in the format: +CGACT: (0,1)Example AT+CGACT?+CGACT: 1,1OKAT+CGACT=1,1OKReference GSM 07.07SW release Version A
Page 118 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.7.2 +CGATT - GPRS attach or detach+ CGATT – GPRS attach or detachExecute commandAT+CGATT = <state>The command is used to attach the terminal to, or detach the terminalfrom, the GPRS service depending on the parameter <state>.Parameter:<state> - indicates the state of GPRS attachment   0 - detached   1 - attachedRead command AT+CGATT?Returns the current GPRS service state.Write commandTest commandAT+CGATT=?Requests information on the supported GPRS service states.Example AT+CGATT?+CGATT: 0OK AT+CGATT=?+CGATT: (0,1)OKAT+CGATT=1OKReference GSM 07.07SW release Version A
Page 119 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.7.3 +CGDATA - Enter data state+ CGDATA – Enter data stateExecute commandAT+CGDATA = [<L2P>,[<cid> [,<cid> [,…]]]]The command causes to perform whatever actions are necessary toestablish communication with the network using one or more GPRSPDP types.Parameters:<L2P> - string parameter that indicates the layer 2 protocol to be used   "PPP" - PPP Point-to-point protocolIf the value is omitted, the layer 2 protocol is unspecified<cid> - numeric parameter which specifies a particular PDP contextdefinition (see +CGDCONT command).Read commandWrite commandTest commandAT+CGDATA=?Requests information on the supported layer 2 protocols.Reports the supported <L2P> parameters valuesExample AT+CGDATA=?+CGDATA: (”PPP”)OKAT+CGDATA=”PPP”,1OKReference GSM 07.07SW release Version A
Page 120 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.7.4 +CGDCONT - define PDP context+ CGDCONT – define PDP contextExecute commandRead commandAT+CGDCONT?Returns the current settings for each defined context in the format:+CGDCONT : <cid>,<PDP_type>,<APN>,<PDP_addr>,<d_comp>,<h_comp>,<pd1> [,…[,pdN]]]]]]]]]Write commandAT+CGDCONT = [<cid>[,<PDP_type>[,<APN>[,<PDP_addr>,<d_comp>[,<h_comp>[,<pd1>[,…[,pdN]]]]]]]]]The command specifies PDP context parameter values for a PDPcontext identified by the (local) context identification parameter,<cid>Parameters:<cid> (PDP Context Identifier) : a numeric parameter which specifiesa particular PDP context definition. The range of permitted values(minimum value = 1) is returned by the test form of the command.<PDP_type> (Packet Data Protocol type) : a string parameter whichspecifies the type of packet data protocol   "IP"     - Internet Protocol   "PPP"  - Point to Point Protocol<APN> (Access Point Name) : a string parameter which is a logicalname that is used to select the GGSN or the external packet datanetwork.If the value is null or omitted, then the subscription value will berequested.<PDP_address>: a string parameter that identifies the terminal inthe address space applicable to the PDP. The allocated address may beread using the +CGPADDR command.<d_comp>: a numeric parameter that controls PDP data compression   0 - off (default if value is omitted)   1 - on<h_comp>: a numeric parameter that controls PDP headercompression   0 - off (default if value is omitted)   1 - on<pd1>, … <pdN>: zero to N string parameters whose meanings arespecific to the <PDP_type>Test commandAT+CGDCONT=?Returns values supported as a compound valueExample AT+CGDCONT?+CGDCONT: 1, ”IP”, ”uni.tim.it”, ”10.10.10.10”,0,0OK
Page 121 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1AT+CGDCONT=?+CGDCONT: (1-3),”IP”,,,(0-1),(0-1)OKAT+CGDCONT=1, ”IP”, ”uni.tim.it”, ”10.10.10.10”,0,0OKReference GSM 07.07SW release Version A3.3.7.1 +CGPADDR - show PDP address+ CGPADDR – show PDP addressExecute commandRead commandWrite commandAT+CGPADDR = [<cid>[,<cid> [,…]]]Returns a list of PDP addresses for the specified context identifiers inthe format:+CGPADDR: <cid>,<PDP_addr>[<CR><LF>+CGPADDR: <cid>,<PDP_addr>]Parameters:<cid> -  a numeric parameter which specifies a particular PDPcontext definition (see +CGDCONT command). If no <cid> isspecified, the addresses for all defined contexts are returned.<PDP_address> - a string that identifies the terminal in theaddress space applicable to the PDP. The address may be static ordynamic. For a static address, it will be the one set by the +CGDCONTcommand when the context was defined. For a dynamic address it willbe the one assigned during the last PDP context activation that used thecontext definition referred to by <cid>,<PDP_addr> is omitted ifnone is availableTest commandAT+CGPADDR=?Returns a list of defined <cid>s.Example AT+CGPADDR=1,2+CGPADDR = 1,”10.10.15.15”+CGPADDR = 2,”10.10.20.10”OKAT+CGPADDR=?+CGPADDR: (1-3)OKReference GSM 07.07SW release Version A
Page 122 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.7.5 +CGREG - GPRS network registration status+ CGREG – GPRS network registration statusExecute commandRead commandAT+CGREG?Returns the status of result code presentation mode <n> and the integer<stat> which shows whether the network has currently indicated theregistration of the terminal in the format:  +CGREG:<n>,<stat>.Write commandAT+CGREG = <n>The command controls the presentation of an unsolicited result code+CGREG: <stat>when <n>=1 and there is a change in the terminal GPRS networkregistration status, or an unsolicited code+CGREG: <stat>[,<lac>,<ci>]when <n>=2 and there is a change of the network cell.Parameter:<n> - result code presentation mode  0 - disable network registration unsolicited result code  1 - enable network registration unsolicited result code        +CGREG: <stat>  2 - enable network registration and location information unsolicited        result code +CGREG:<stat>[,<lac>,<ci>]where:<lac> - location area code in hexadecimal format               (e.g. "00C3" equals 195 in decimal)<ci> - cell ID in hexadecimal format<stat> -  registration status  0 - not registered, terminal is not currently searching a new operator        to register to  1 - registered, home network  2  - not registered, but terminal is currently searching a new operator         to register to  3 - registration denied  4 - unknown  5 - registered, roamingTest commandAT+CGREG=?Returns supported values for parameter <n>ExampleReference GSM 07.07SW release Future Software Release
Page 123 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.13.3.7.2 +CGQMIN - quality of service profile (minimum acceptable)+ CGQMIN – quality of service profile (minimum acceptable)Execute commandRead commandAT+CGQMIN?Returns the current settings for each defined context in the format:+CGQMIN: <cid>,<precedence>,<delay>,<reliability>,<peak>,<mean>ExampleWrite commandAT+CGQMIN = [<cid>[,<precedence >[,<delay> [,<reliability>[,<peak> [,<mean>]]]]]]This command allows to specify a minimum acceptable profile whichis checked by the terminal against the negotiated profile returned in theActivate PDP Context Accept messageParameters:<cid> - PDP context identification (see +CGDCONT command).The following parameters are defined according to GSM 03.60:<precedence> - precedence class<delay> - delay class<reliability> - reliability class<peak> - peak throughput class<mean> - mean throughput classIf a value is omitted for a particular class then this class is not checked.Test commandAT+CGQMIN=?Returns values supported as a compound value.Example AT+CGQMIN=1,0,0,3,0,0OKAT+CGQMIN?+CGQMIN: 1,0,0,5,0,0OK AT+CGQMIN=?+CGQMIN: (0-3),(0-3),(0-5),(0-9),(0-19,31)OKReference GSM 07.07SW release Version A
Page 124 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.13.3.7.3 +CGQREQ - quality of service profile (requested)+ CGQREQ – quality of service profile (requested)Execute commandRead commandAT+CGQREQ?Returns the current settings for each defined context in the format:+CGQREQ: <cid>,<precedence>,<delay>,<reliability>,<peak>,<mean>Write commandAT+CGQREQ = [<cid>[,<precedence >[,<delay> [,<reliability>[,<peak> [,<mean>]]]]]]The command allows to specify a Quality of Service Profile that isused when the terminal sends an Activate PDP Context Requestmessage to the network. It specifies a profile for the context identifiedby the (local) context identification parameter, <cid>.Parameters:<cid> - PDP context identification (see +CGDCONT command).The following parameters are defined according to GSM 03.60:<precedence> - precedence class<delay> - delay class<reliability> - reliability class<peak> - peak throughput class<mean> - mean throughput classIf a value is omitted for a particular class then this class is not checked.Test commandAT+CGQREQ=?Returns parameter values supported as a compound value.Example AT+CGQREQ?+CGQREQ: 1,0,0,3,0,0OKAT+CGQREQ=1,0,0,3,0,0OKAT+CGQREQ=?+CGQREQ: (0-3),(0-3),(0-5),(0-9),(0-19,31)OKReference GSM 07.07SW release Version A
Page 125 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.5.8  Commands For Battery Charger2.5.8.1 +CBC - Battery Charge+ CBC – Battery ChargeExecute commandRead commandAT+CBCReturns the current Battery Charge status in the format:+CBC: <bcs>,<bcl>Parameter:<bcs> - battery status  0 - Me is powered by the battery<bcl> - battery charge level  0 - battery is exausted, or ME does not have a battery connected  25 - battery charge remained is estimated to be  25%  50 - battery charge remained is estimated to be  50%  75 - battery charge remained is estimated to be  75%  100 - battery is fully charged.Write commandTest commandAT+CGACT=?Reports information on the supported PDP context activation statesparameters in the format: +CGACT: (0,1)Example AT+CBC+CBC: 0,75OKNOTE The ME does not make differences between being powered by abattery or by a power supply on the VBATT pins, so it is not possibleto distinguish between these two cases.Reference GSM 07.07SW release Version A
Page 126 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.6  ETSI GSM 07.05 AT Commands for SMS andCB services2.6.1  General configuration2.6.1.1  +CSMS - select message service+CSMS – select message serviceExecute commandRead commandAT+CSMS? Reports the value of the current parameters in the format:+CSMS: <service>,<mt>,<mo>,<cb>where:<service> - message syntax   0 - SMS syntax as defined in GSM-03.40 and GSM-03.41. ATcommands are compatible with GSM 07.05 Phase 2.   1 - SMS syntax as defined in GSM-03.40 and GSM-03.41. ATcommands are compatible with GSM 07.05 Phase 2+<mt> - Mobile Terminated Messages<mo> - Mobile Originated Messages<cb> - Cell Broadcast Messages  0 - not supported  1 - supportedWrite commandAT+CSMS = <service> Selects the SMS & CB services command syntax.Parameter:<service> = 0 - SMS syntax as defined in GSM-03.40 and GSM-03.41. AT commands are compatible with GSM 07.05 Phase 2.<service> = 1 - SMS syntax as defined in GSM-03.40 and GSM-03.41.AT commands are compatible with GSM 07.05 Phase 2+Test command AT+CSMS=? Reports the supported value of the parameter <service> = 0.ExampleReference GSM 07.05SW release Version A
Page 127 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.6.1.2 +CPMS - preferred message storage+CPMS – preferred message storageExecute commandRead commandAT+CPMS? Reports the message storage status in the format:+CPMS:<memr>,<usedr>,<totalr>,<memw>,<usedw>,<totalw>,<mems>,<useds>,<totals>where <memr> , <memw> and <mems> are the selected storagememories for reading, writing and storing respectively.Write commandAT+CPMS =<memr>,<memw>,<mems>Selects memory storages <memr>, <memw> and <mems> to be usedfor reading, writing, sending and storing received SMS.Parameter:<memr> - memory storage for read and delete SMS commands    "SM" - SIM SMS memory storage    "ME" - Mobile Equipment internal storage (read only, no delete)<memw> - memory storage for write and send SMS commands     "SM" - SIM SMS memory storage<mems> - memory storage for received SMS storing     "SM" - SIM SMS memory storageThe command returns the memory storage status in the format:+CPMS:<usedr>,<totalr>,<usedw>,<totalw>,<useds>,<totals><usedr> - number of SMS stored into <memr><totalr> - max number of SMS that <memr> can contain<usedw> - number of SMS stored into <memw><totalw> max number of SMS that <memw> can contain<useds> - number of SMS stored into <mems><totals> max number of SMS that <mems> can containNote: The only memory storage for writing and sending supported isthe SIM internal memory "SM", so <memw> =  <mems> = "SM".Note: the received class 0 SMS are stored in the "ME" memoryregardless the <mems> setting and they are automatically deleted atpower off.Test command AT+CPMS=? Reports the supported values of the SMS storage memories in theformat: +CPMS: ("ME","SM"), ("SM")Example AT+CPMS?+CPMS: "SM",5,10,"SM",5,10,"SM",5,10OK (you have 5 SMS SIM positions occupied of 10)Reference GSM 07.05SW release Version A
Page 128 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.6.1.3  +CMGF - message format+CMGF –message formatExecute commandRead commandAT+CMGF? Reports the current value of the parameter <mode> = 0.Write commandAT+CMGF = <mode> Selects the SMS format to be used in reading and writing messages.Parameter:<mode> = 0 - PDU as defined in GSM 3.40 and GSM 3.41<mode> = 1 - textTest command AT+CMGF=? Reports the supported value of <mode> parameter.ExampleReference GSM 07.05SW release Version A2.6.1.4  +CSMP – Set parameters in text mode+CSMP –set parameters in text modeExecute commandRead commandAT+CSMP?Reports the current setting in the format: +CSMP: < fo>,<vp>,<pid>,<dcs>Write commandAT+CSMP =<fo>,<vp>,<pid>,<dcs>Set the additional parameters for storing and sending SMS when thetext mode is used (+CMGF=1)Parameter:<fo>:  message format, like defined for the first octet of messageaccording to GSM 3.40<vp>: Message validity period - numerical if in relative format orstring if in absolute format according to GMS 3.40<pid>: Protocol Identifier – defined by GSM 3.40 – in numericalformat<dcs>: Data coding Scheme - defined by GSM 3.40 – in numericalformatTest commandAT+CSMP=?Reports the supported range of values for<fo>,<vp>,<pid>,<dcs> parameters.Example Set the parameters for an outgoing message with 24 hours of validityperiod and default properties:AT+CSMP=17,167,0,0OKReference GSM 07.05SW release Version A
Page 129 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.6.1.5  +CSDH – Show parameters in text mode+CSDH –show parameters in text modeExecute commandRead commandAT+CSDH? Report the current setting in the format:+CSDH: <show>Write commandAT+CSDH= <show> Show the additional parameters of received or stored SMS when thetext mode is used (+CMFG=1).Parameter:<show> = 0 - no additional parameters are shown<show> = 1 - parameters set by the +CSCA and + CSMP commandsare shown and the length, sender/addressee address of SMS when+CMT, +CMGL, +CMGR commands are utilisedTest commandAT+CSDH=? Reports the supported range of values for the parameter<show>ExampleReference GSM 07.05SW release Version A2.6.1.6  +CSAS – Save setting text mode+CSAS –set saving text modeExecute commandRead commandWrite commandAT+CSAS=<profile>Save setting which have been made by the +CSCA and +CSMPcommands in local volatile memory (or in the SIM if it has a dedicatedstorage for this purpose).Parameter:<profile>:  0…3 - number of profile in which to save the setting.The number 0 corresponds to the non volatile memory, the otherscorrespond to the SIM storage (if available).Test commandAT+CSAS=? Return the possible range of values for the parameter <profile>.ExampleReference GSM 07.05SW release Version A
Page 130 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.6.1.7  +CRES – Restore text mode settings+CRES –restore text mode settingsExecute commandRead commandWrite commandAT+CRES = <profile> Restore any setting saved by +CSAS command for +CSCA and+CSMP commands in local non volatile memory (or in the SIM if ithas a dedicated store for this purpose).Parameter:<profile>:  0…3 – number of profile from which to recall the setting.The number 0 corresponds to the non volatile memory, the otherscorrespond to the SIM storage (if available).Test commandAT+CRES=? Return the possible range of values for the parameter <profile>.ExampleReference GSM 07.05SW release Version A
Page 131 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.6.1.8 +CSCB – Select Cell Broadcast Message types+CSCB –select Cell Broadcast Message typesExecute commandRead commandAT+CSCB? Reports the current value of the parameters <mode>,<misd> and<dcss> in the format:+CSCB: <mode>,<mids>,<dcss>Write commandAT+CSCB=<mode>[,<mids>[,<dcss>]]Selects the Cell Broadcast message types to be received by the device.Parameter:<mode>   0 - the message types defined by <mids> and <dcss> are accepted   1 - the message types defined by <mids> and <dcss> are rejected<mids> : all the possible combinations of the CBM identifiers<dcss> :  all the possible combinations of CBM data coding schemes.Test commandAT+CSCB=? Return the possible range of values for the parameter <mode>.Example AT+CSCB?+CSCB: 1,"",""    (all CBMs are accepted, none is rejected)OKAT+CSCB=0,"0,1,300-315,450","0-3"OKReference GSM 07.05SW release Version A
Page 132 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.6.1.9  +CMS ERROR - message service failure result codeThis is NOT a command, it is the error response to +Cxxx GSM 07.05 commandsSyntax: AT+CMS ERROR:<err>Parameter: <err> - error code can be either numeric or verbose.<err>  values:Numeric Format  Verbose Format0...127  GSM 04.11 Annex E-2 values128...255  GSM 03.40 sub clause 9.2.3.22 values300  ME failure301  SMS service of ME reserved302  operation not allowed303  operation not supported304  invalid PDU mode parameter305  invalid text mode parameter310  SIM not inserted311  SIM PIN required312  PH-SIM PIN required313  SIM failure314  SIM busy315  SIM wrong316  SIM PUK required317  SIM PIN2 required318  SIM PUK2 required320  memory failure321  invalid memory index322  memory full330  SMSC address unknown331  no network service332  network timeout340  no +CNMA acknowledgement expected500  unknown error
Page 133 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.6.2  Message configuration2.6.2.1  +CSCA - service center address+CSCA –service center addressExecute commandRead commandAT+CSCA? Reports the current value of the default SCA in the format:+CSCA: <number>,<type>Note: if  SCA is not present the device reports an error message.Write commandAT+CSCA=<number>,<type>Sets the Service center Address to be used for mobile originated SMStransmissions.Parameter:<number> - SC phone number in the format defined by <type><type> - the type of number<type> = 145 - international numbering scheme (contains the character"+")<type> = 129 - national numbering schemeNote: to use the SMS service, is mandatory to set a Service CenterAddress at which service requests will be directed. SCA depends onthe operator, hence contact your operator to set the right SCA. Whenthis address is input, it is stored on the SIM if possible, else will bestored on the device internal memory so, once set, the input of thisparameter is not anymore needed.In PDU mode, this setting is used, but only when the length of theSMSC address coded into the <pdu> parameter equals zero; else SCAdefined in the PDU will be used instead.Test commandExampleReference GSM 07.05SW release Version A
Page 134 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.6.3  Message receiving and reading2.6.3.1  +CNMI - new message indications to Terminal Equipment+CNMI – new message indications to terminal equipmentRead commandAT+CNMI? Returns the current parameter settings for +CNMI  command in theform:AT+CNMI:<mode>,<mt>,<bm>,<ds>,<bfr>Write commandAT+CNMI=<mode>[,<mt>[,<bm>[,<ds>[,<bfr>]]]] Selects the behavior of the device on how the receiving of newmessages from the network is indicated to the DTE.Parameter:<mode>- unsolicited result codes buffering option     0 - buffer unsolicited result codes in the TA in case the DTE isbusy, e.g. a data call is active meanwhile.     1- 1 Discard indication and reject new received messageunsolicited result codes when TA-TE link is reserved, otherwiseforward them to the TE.     2 - buffer unsolicited result codes in the TA in case the DTE isbusy and flush them to the TE after reservation. Otherwise reportthem immediately.<mt> result code indication reporting for SMS-DELIVER     0 - no SMS-DELIVER indications are reported to the TE.     1 - indication of the memory location is reported to the TE usingunsolicited result code:+CMTI: <memr>,<index>where         <memr> -  memory storage where the new message is stored("SM" or "ME")         <index> - location on the memory where SMS is stored<bm>  - broadcast reporting option   0 - Cell Broadcast Messages are not sent to the DTE   2 - New Cell Broadcast Messages are sent to the DTE with theunsolicited result code: +CBM: <length><CR><LF><PDU> ( in PDU mode)or+CBM:<sn>,<mid>,<dcs>,<pag>,<pags><CR><LF><text> (in textmode)where:<length> - PDU length
Page 135 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+CNMI – new message indications to terminal equipment<PDU> - message PDU<sn> - message serial number<mid> - message ID<dcs> - Data Coding Scheme<pag> - page number<pags> - total number of pages of the message<text> - message text<ds> - SMS-STATUS-REPORTs reporting option   0  - status report receiving is not reported to the DTE   1 - the status report is sent to the DTE with the unsolicited resultcode:          +CDS: <length><CR><LF><PDU> (PDU mode)          or          +CDS: <fo>,<mr>,,,<scts>,<dt>,<st>   (text mode)   2 - if a status report is stored, then unsolicited result code is sent:+CDSI: <memr>,<index>where<memr> -  memory storage where the new message is stored("SM")<index> - location on the memory where SMS is stored<length> - PDU length<PDU> - message PDU<fo> - first octet of the message PDU<mr> - message reference number<scts> - arrival time of the message to the SC<dt> - sending time of the message<st> - message status as coded in the PDU <bfr> - buffered result codes handling method (NOTSUPPORTED)    0 - buffer flushed. (NOT SUPPORTED)Note: DTR signal is ignored, hence the indication is sent even if theDTE is inactive ( DTR signal is Low). In this case the unsolicitedresult code may be lost so if GM862-PCS remains active while DTEis not, at DTE startup is suggested to check whether new messageshave reached the device meanwhile with command AT+CMGL=0that lists the new messages received.Test commandAT+CNMI=? Reports the supported range of values for the +CNMI commandparameters.
Page 136 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+CNMI – new message indications to terminal equipmentReference GSM 07.05SW release Version A2.6.3.2  +CMGL - list messages+CMGL – list messagesExecute commandRead commandWrite commandAT+CMGL = <stat> Reports the list of all the messages stored into <memr> (seecommand +CPMS ) memory storage having the status equal to <stat>parameter.Parameter (PDU Mode):<stat> 0 -  new message 1 - read message 2 - stored message not yet sent 3 - store message already sent 4 - all messages (applies only to +CMGL command)A report is sent for each message that has to be listed in the format:+CMGL: <index>,<stat>,<length><CR><LF><pdu>where<index> - message position in the memory storage list.<stat> - status of the message<length> - length of the PDU in bytes<pdu> - message in PDU format according to GSM 3.40Note: OK message is sent only at the end of the listing.Parameter (Text Mode):<stat> "REC UNREAD" -  new message "REC READ" - read message "STO UNSENT" - stored message not yet sent "STO SENT" - store message already sent "ALL" - all messages (applies only to +CMGL command)A report is sent for each message that has to be listed in the format:+CMGL:<index>,<stat>,<oa/da>[,,,<tooa/toda>,<length>]<CR><LF><text>where<index> - message position in the storage<stat> - message status
Page 137 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+CMGL – list messages<oa/da> - originator/destination number< tooa/toda > -  type of number <oa/da>      145 - number in international format (contains the "+")      129 - number in national format<length> - text length<text> - message textFor each message delivery confirm a result code is reported in theformat:+CMGL: <index>,<stat>,<fo>,<mr>,,,<scts>,<dt>,<st>Where<index> - message position in the storage<stat> - message status<fo> - first octet of the message PDU<mr> - message reference number<scts> - arrival time of the message to the SC<dt> - sending time of the message<st> - message status as coded in the PDUTest commandExampleReference GSM 07.05SW release Version A
Page 138 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.6.3.3  +CMGR - read message+CMGR – read messageExecute commandAT+CMGR = <index> Reports the message with location value <index> from preferredmessage storage <memr> (see +CPMS) in the format:(PDU Mode)+CMGR: <stat>,<length><CR><LF><pdu>where<stat> - status of the message  0 -  new message  1 - read message  2 - stored message not yet sent  3 - store message already sent<length> - length of the PDU in bytes.<pdu> - message in PDU format according to GSM 3.40.(Text Mode)For the sent messages:+CMGR: <stat>,<oa>,,<scts> [,<tooa>,<fo>,<pid>,<dcs>,<sca>,<tosca>,<length>]<CR><LF><text>For the received messages:+CMGR: <stat>,<da>[,,<toda>,<fo>,<pid>,<dcs>,,<sca>,<tosca>,<length>]<CR><LF><testo>For the message delivery confirm:+CMGR: <stat>,<fo>,<mr>,,,<scts>,<dt>,<st>Where:<stat> - status of the message  "REC UNREAD" -  new received message unread  "REC READ" - received message read  "STO UNSENT" - message stored not yet sent  "STO SENT" - message stored already sent<fo> - first octet of the message PDU<mr> - message reference number<scts> - arrival time of the message to the SC<dt> - sending time of the message
Page 139 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1<st> - message status as coded in the PDU<pid> - Protocol Identifier<dcs> - Data Coding Scheme<oa> - Originator address number<da> - Destination address number<sca> - Service Centre number< tooa>,<toda >,<tosca> -  type of number <oa>,<da>,<sca>      145 - number in international format (contains the "+")      129 - number in national format<length> - text length<text> - message textThe status of the message and entire message data unit <pdu> isreturned. If status of the message is 'received unread', status in thestorage changes to 'received read'.Parameter: <index>Note: if record number <index> on message storage memory isempty, then an error message will be returned.Read commandWrite commandTest commandExampleReference GSM 07.05SW release Version A
Page 140 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.6.4  Message sending and writing2.6.4.1  +CMGS - send message+CMGS – send messageExecute command(PDU Mode)AT+CMGS = <length>(PDU Mode)Sends to the network a SMS message input as a PDU.Parameter:<length> = 8…176 - represents the length of the PDU to be sent inbytes.The device responds to the command with the prompt '>' and awaitsfor the number of bytes of PDU specified.To complete the operation send Ctrl-Z char (0x1A hexadecimal) , toexit without sending the message send ESC char (0x1Bhexadecimal ).If message is successfully sent to the network, then the result is sentin the format:+CMGS: <mr>where <mr>  is the message reference number.If message sending fails for some reason, an error code is reported.(Text Mode)AT+CMGS=<da>(Text Mode)Sends to the network a SMS message input as a text message.Parameter:<da> = destination address numberThe device responds to the command with the prompt '>' and awaitsfor message text (max 160 characters).To complete the operation send Ctrl-Z char (0x1A hexadecimal) , toexit without sending the message send ESC char (0x1Bhexadecimal).If message is successfully sent to the network, then the result is sentin the format:+CMGS: <mr>where <mr>  is the message reference number.If message sending fails for some reason, an error code is reported.Note: Care must be taken to ensure that during the commandexecution, which might take several seconds, no other SIMinteracting commands are issued.To avoid malfunctions is suggested to wait for the+CMGS:<mr> or +CMS ERROR:<err> responsebefore issuing further commands.Read command
Page 141 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+CMGS – send messageWrite commandTest commandExampleReference GSM 07.05SW release Version A2.6.4.2  +CMSS - send message from storage+CMSS – send message from storageExecute commandAT+CMSS = <index> Sends to the network, the message which is already stored in the<memw> storage (see +CPMS) at the location <index>.Parameter: <index>If message is successfully sent to the network, Sends to the network,then the result is sent in the format:+CMSS: <mr>where <mr>  is the message reference number.If message sending fails for some reason, an error code is reported:+CMS ERROR:<err>Note: to store a message in the <memw> storage see command+CMGW.Care must be taken to ensure that during the command execution,which might take several seconds, no other SIM interactingcommands are issued.To avoid malfunctions is suggested to wait for the +CMGS:<mr> or+CMS ERROR:<err> response before issuing further commands.Read commandWrite commandTest commandExampleReference GSM 07.05SW release Version A
Page 142 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.6.4.3  +CMGW -  write message to memory+CMGW – write message to memoryExecute command(PDU Mode)AT+CMGW = <length>(Text Mode)AT+CMGW = [<da>](PDU Mode)Writes in the <memw> memory storage a new SMS message input asa PDU.Parameter:<length> - represents the length of the PDU to be written in bytes.The device responds to the command with the prompt '>' and awaitsfor the number of bytes of PDU specified.To complete the operation send Ctrl-Z char (0x1A hexadecimal) , toexit without writing the message send ESC char (0x1B hexadecimal).If message is successfully written in the memory, then the result issent in the format:+CMGW: <index>where <index>  is the message location index in the memory<memw>("SM").If message storing fails for some reason, an error code is reported(Text Mode)Writes in the <memw> memory storage a new SMS message input asText.Parameter:<da> - destination address numberThe device responds to the command with the prompt '>' and awaitsfor the message text ( max 160 characters).To complete the operation send Ctrl-Z char (0x1A hexadecimal) , toexit without writing the message send ESC char (0x1B hexadecimal).If message is successfully written in the memory, then the result issent in the format:+CMGW: <index>where <index>  is the message location index in the memory<memw>("SM").If message storing fails for some reason, an error code is reportedNote: Care must be taken to ensure that during the commandexecution, no other SIM interacting commands are issued.To avoid malfunctions is suggested to wait for the +CMGS:<mr> or+CMS ERROR:<err> response before issuing further commands.
Page 143 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1+CMGW – write message to memoryRead commandWrite commandTest commandExampleReference GSM 07.05SW release Version A2.6.4.4  +CMGD - delete message+CMGD – delete messageExecute commandAT+CMGD =<index>[,<delflag>] Deletes from memory the message/messagesNote: if the location to be deleted is empty, an error message isreported.Parameter:<index> - message position index in the selected storage <memr><delflag> - delete mode selection flag   0 (or not present) - delete message at position <index>   1 - delete all received read messages   2 - delete all received read and all sent messages   3 - delete all received read and all written sent/unsent messages   4  - delete all messages.Read commandWrite commandTest commandExampleReference GSM 07.05SW release Version A
Page 144 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7  Custom AT Commands2.7.1  General configuration2.7.1.1  #CAP - Change Audio Path#CAP – change audio pathExecute commandAT#CAP = <n> Switches the active audio path depending on parameter <n>Parameter:<n>  audio path     0 - audio path follows the Axe input (default at start up):                 Axe = low  - handsfree enabled                 Axe = high - internal path enabled     1 - enables handsfree  external mic/ear audio path     2 - enables internal mic/ear audio pathNote: The audio path are mutually exclusive, enabling one disables theother.When changing the audio path, the volume level is set at the previouslystored value for that audio path. (see AT+CLVL).Read commandAT#CAP? Reports the active audio path in the format:  #CAP: <n>.Write commandTest commandAT#CAP=? Reports the supported values for the parameter <n>.ExampleReference Telit GM862-PCS AT Command SpecificationSW release Version A
Page 145 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.2  #SRS - Select ringer sound#SRS – select ringer soundExecute commandAT#SRS =<n>[,<timeout>] Set the ringer sound. The parameters are:<n> - ringing tone    0 - current ringing tone    1 .. 12 - ringing tone number<timeout> ringing tone playing timeout in seconds.     0 - no ringing tone playing, only tone setting     1 .. 60 -  <n> tone playing for <timeout> seconds and successivetone setting.Note: When the command is issued with <timeout> >0, the <n>ringing tone is played for <timeout> seconds and then stored as currenttone.If  command is issued with <timeout> = 0, the playing of  the ringing isstopped (if present) and <n> ringing tone is set as default.If command is issued with <n> = 0 and <timeout> >0 then the defaultringing tone is played.If both <n> and <timeout> are 0 then currently playing tone is set asdefault and ringing is stopped.Read commandAT#SRS? Reports current selected ringing and its status in the form:#SRS: <n>,<status>where:<n> ringing tone number       1 .. 12<status>  ringing status      0 - selected but not playing      1 - currently playingWrite commandTest commandAT#SRS=? Reports the supported values for the parameters <n> and <timeout>ExampleReference Telit GM862-PCS AT Command SpecificationSW release Version A
Page 146 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.3  #SRP –Select Ringer Path#SRP – select ringer pathExecute commandAT#SRP=<n> Selects the audio path towards whom sending ringer sounds and allsignaling tones.Parameter:<n> - Ringer path number     0 - sound output towards current selected audio path (seecommand #CAP)     1 - sound output towards handsfree     2 - sound output towards headset     3 - sound output towards Buzzer Output pin GPIO7Note: In order to use the Buzzer Output an external circuitry must beadded to drive it properly from the GPIO7 pin, furthermore theGPIO7 pin direction must be set to Buzzer output (Alternate function)see command #GPIO.Read commandAT#SRP? Reports the current ringer path setting in the format:  #SRP:<n>.Write commandTest commandAT#SRP=? Reports the supported values for the parameter <n>.Example AT#SRP=?#SRP=(0-3)OKAT#SRP=3OKReference Telit GM862-PCS AT Command SpecificationSW release Version A
Page 147 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.4  #STM - Signalling Tones Mode#STM – signalling tones modeExecute commandRead commandAT#STM? Reports the current signaling tones status in the format:#STM: <mode>Write command AT#STM = <mode> Enables/disables the signaling tones output on the audio path selectedwith #SRP commandParameter :<mode> - signaling tones status<mode> = 0 - signaling tones disabled<mode> = 1 - signaling tones enabledTest commandAT#STM=? Reports supported range of values for <mode> parameter.ExampleReference Telit GM862-PCS AT Command SpecificationSW release Version B2.7.1.5  #PCT – display PIN Counter#PCT – display PIN counterExecute commandRead commandAT#PCT? Reports the PIN/PUK or PIN2/PUK2 input remaining attempts,depending on +CPIN requested password in the format:#PCT:<n>Note: If +CPIN requires the PIN then max 3 attempts are allowed,after that the PUK code is requested; if even PUK is input wrong forother three time then #PCT:0 and SIM remains blocked.Write commandTest commandExampleReference Telit GM862 AT-GPRS Command SpecificationSW release Version A
Page 148 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.6  #SHDN – Software Shut Down#SHDN – software shutdownExecute commandAT#SHDN After the issuing of this command device detaches from the networkand shuts down. Before definitive shut down an OK response isreturned.Note: after the issuing of this command any previous activity isterminated and the device will not respond to any further command.To turn it on again Hardware pin ON/OFF must be tied low.Read commandWrite commandTest commandExampleReference Telit GM862 AT-GPRS Command SpecificationSW release Version A
Page 149 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.7 #WAKE – Wake from Alarm mode#WAKE – Wake from Alarm ModeExecute commandAT#WAKE=0 After the issuing of this command device exits the "Alarm mode" andenters the normal operating mode. After entering in normal operatingmode an OK response is returned.With the execution of is command all Alarm activity (for examplealarm tone playing )  is immediately terminated.If the command is issued during the normal operating mode then theonly action is to stop Alarm activity, if present, and return OKresponse.Read commandAT#WAKE? This command returns the operating mode status of the device in theformat:#WAKE: <status>where:<status> - operating mode   0 - normal operating mode   1 - alarm modeNote: The "alarm mode" is indicated by hardware pin CTS to the ONstatus and DSR to the OFF status, while the "power saving" status isindicated by a CTS - OFF and DSR - OFF status. The normaloperating status is indicated by DSR - ON.During the "alarm mode" the device will not make any network scanand will not register to any network and therefore is not able to dialor receive any call or SMS, the only commands that can be issued tothe GM862-PCS in this state are the #WAKE and #SHDN, everyother command must not be issued during this state.Write commandTest commandExampleReference Telit GM862-PCS AT Command SpecificationSW release Version A
Page 150 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.8  #QTEMP –Query Temperature overflow#QTEMP – query temperature overflowExecute commandRead commandAT#QTEMP? Queries the internal temperature sensor of the device for overtemperature. The result is reported in the format:#QTEMP:<temp>where<temp> - over temperature indicator<temp> = 0 - device temperature is in the working range<temp> = 1- device temperature is out of the working range, may betoo high or too low.Note: The device should not be operated out of its working temperaturerange; if temperature is out of range proper functioning of the device isnot ensured.Write commandAT#QTEMP = <mode> Sets the type of indication.Parameter:<mode> - type of indication   0 - result reported only when querying with  #QTEMP?   1 - reserved for future use   2 – reserved for future useTest command#QTEMP=? Reports supported range of values for <mode> parameter.ExampleReference Telit GM862-PCS AT Command SpecificationSW release Version A
Page 151 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.9  #SGPO –Set General Purpose Output#SGPO – set general purpose outputExecute commandRead commandAT#SGPO? Reports the #SGPO command setting, hence the opposite status of theopen collector pin in the format:  #SGPO: <stat>.Write commandAT#SGPO = <stat> Sets the value of the general purpose output pin GPIO2 according to<stat> parameterParameter:<stat>  0 - output pin cleared to 0 (LOW)  1 - output pin set to 1 (HIGH)Note: The GPIO2 is an OPEN COLLECTOR output, the commandsets the transistor base level, hence the open collector output isnegated:AT#SGPO= 0  sets the open collector output HIGHAT#SGPO= 1  sets the open collector output LOWA pull up resistor is required on pin GPIO2.Test commandAT#SGPO=? Reports the supported range of values of the command  parameter<stat>.ExampleReference Telit GM862-PCS AT Command SpecificationSW release Version A
Page 152 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.10  #GGPI – Read General Purpose Input#GGPI – read general purpose inputExecute commandRead commandAT#GGPI? Reports the read value for the input pin GPIO1in the format:#GGPI: <dir>,<stat>where<dir> direction setting (see  #GGPI=<dir> )<stat> - logic value read from pin GPIO1Note: Since the reading is done after the insulating transistor, thereported value is the opposite of the logic status of  the GPIO1 inputpin.Write commandAT#GGPI = <dir> Set the General purpose input pin behavior depending on parameter<dir>.Parameter: <dir> - auxiliary input GPIO1 setting<dir> = 0 - the read command reports the logic input level read fromGPIO1 pin.<dir> = 1…255 - reserved for future useNote: The device has an insulated input pin ( the input goes the base ofan internal decoupling transistor) which can be used as a logic generalpurpose input. This command sets the read behaviour for this pin, sinceonly direct read report is supported, the issue of this command is notneeded.In future uses the behavior of the read input  may be more complex.Test commandExampleReference Telit GM862-PCS AT Command SpecificationSW release Version A
Page 153 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.11 #GPIO –General Purpose Input/Output pin control#GPIO –General Purpose Input/Output pin controlExecute commandRead commandAT#GPIO=<pin>,2 Reports the read value for the pin GPIO<pin> in the format:#GPIO: <dir>,<stat>where<dir>  - current direction setting for the GPIO<pin><stat> - logic value read from pin GPIO<pin> in the case the pin             <dir> is set to input;           - logic value present in output of the pin GPIO<pin> in the case              the pin <dir> is currently set to output;           - no meaning value for the pin GPIO<pin>  in the case              the pin <dir> is set to alternate function;Note for GPIO1: Since the reading is done after the insulatingtransistor, the reported value is the opposite of the logic status of  theGPIO1 input pin.Write commandAT#GPIO =<pin>,<mode>,<dir> Sets the value of the general purpose output pin GPIO<pin> accordingto <dir> and <mode> parameter.Not all configuration for the three parameters are valid.Parameter:<pin> - GPIO pin number    supported range is from 1 to 7, but GPIO1 is input only and GPIO2    is output only.<dir> - GPIO pin direction  0 - pin direction in INPUT  1 - pin direction is OUTPUT  2 - pin direction is ALTERNATE FUNCTION *see Note<mode> - its meaning depends on <dir> setting: 0 - no meaning  if <dir> = 0 - INPUT     - output pin cleared to 0 (LOW) if <dir> = 1 - OUTPUT     - no meaning if <dir> = 2 - ALTERNATE FUNCTION
Page 154 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1 1 - no meaning if <dir> = 0 - INPUT    - output pin set to 1 (HIGH) if <dir> = 1 - OUTPUT    - no meaning if <dir> = 2 - ALTERNATE FUNCTION 2 - Reports the read value from the input pin (see Read command) if<dir> = 0 - INPUT   - Reports the read value from the input pin (see Read command) if<dir> = 1 - OUTPUT   - Reports a no meaning value (see Read command) if <dir> = 2 -ALTERNATE FUNCTIONNote: "ALTERNATE FUNCTION" value is valid only for pinsGPIO6 - alternate function is "Alarm Output" (see command +CALA)GPIO7 - alternate function is "Buzzer Output" (see command #SRP)While using the pins in the alternate function, the GPIO read/writeaccess to that pin is not accessible and shall be avoided.Note: The GPIO2 is an OPEN COLLECTOR output, the commandsets the transistor base level, hence the open collector output is negatedTest commandAT#GPIO=? Reports the supported range of values of the command  parameters<pin>,<mode>,<dir>.Example AT#GPIO=3,0,1OKAT#GPIO=3,2#GPIO: 1,0OKAT#GPIO=4,1,1OKAT#GPIO=5,0,0OKAT#GPIO=6,2#GPIO: 0,1OKAT#GPIO=7,0,0OKReference Telit GM862-PCS AT Command SpecificationSW release Version A
Page 155 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.12  #MONI – Monitor Cells#MONI – monitor cellExecute command AT#MONI Reports the available data for cell and dedicated channel (if exists) inthe format:#MONI: <netname> BSIC:<bsic> RxQual:<qual> LAC:<lac>Id:<id> ARFCN:<arfcn> PWR:<dBm> dBmor in the case the network name is not known:#MONI: Cc:<cc> Nc:<nc> BSIC:<bsic> RxQual:<qual> LAC:<lac>Id:<id> ARFCN:<arfcn> PWR:<dBm> dBmor in the case in which the data of the adjacent cell are underobservation (number>0):#MONI: Adj Cell<n> [LAC:<lac> Id:<id>] ARFCN:<arfcn>PWR:<dBm> dBmwhere:netname = name of network operatorcc = country codenc = network operator coden = progressive number of adjacent cellbsic = base station identification codequal = quality of reception (0-7)lac = localization area codeid = cell identifierarfcn = assigned radio channeldBm = received signal strength in dBmRead commandWrite commandAT#MONI =<number> Set the neighbor cell to extract data of the cell number <number>Parameter: <number>Test commandAT#MONI=?(Version B)Reports the available neighbour cells and current cell preset in theformat: #MONI: <CellNo, CellSet>where:<CellNo> - neighbour cells number<CellSet> - cell preset = 0, …, n where 0 is the serving cellExampleNote The refresh time of the measures is preset to 3 secReference Telit GM862-PCS AT Command SpecificationSW release Version A
Page 156 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.13 #QSS – Query SIM Status#QSS – query SIM statusExecute commandRead commandAT#QSS? Reports the query SIM status in the format:#QSS: <mode>,<status>where<mode>:  type of enabled notification<mode> = 0 - query only<mode> = 1 - send unsolicited indication (#USS) every change of state<status>:  current SIM status<status> = 0 - SIM NOT INSERTED<status> =1 - SIM INSERTEDWrite commandAT#QSS = <mode> Set the type of notification.If enabled (mode = 1) at any status change is send:#USS: <status>Parameter: <mode>Test commandAT#QSS=? Returns the supported range of values of the parameter <mode>.ExampleReference Telit GM862-PCS AT Command SpecificationSW release Version A
Page 157 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.14  #ACAL – Set Automatic Call#ACAL – set automatic callExecute commandRead commandAT#ACAL? Returns the current status in the format:#ACAL: <mode>Write commandAT#ACAL = <mode> Enable the automatic call.Parameter:<mode> = 0 – disable<mode> = 1 – enableIf enabled, the transition OFF/ON of DTR causes an automatic datacall to the number stored in position number 1 of the phone book.The &D command must be set to 2.Test commandAT#ACAL=? Returns the supported range of values of the parameter <mode>.ExampleReference Telit GM862-PCS AT Command SpecificationSW release Future SW Version
Page 158 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.15  #SMOV – SMS Overflow#SMOV – SMS overflowExecute commandRead commandAT#SMOV? Return the current status in the format: #SMOV: <mode>.Write commandAT#SMOV= <mode> Enable the signalling of SMS overflowParameter:<mode> = 0 - disable<mode> = 1 - enableIf enable, when the maximum storage capacity has came, the#USMO:<memo> network initiated notification is send.Test commandAT#SMOV=? Returns the supported range of values of the parameter <mode>.ExampleReference Telit GM862-PCS AT Command SpecificationSW release Version A2.7.1.16 #SHFEC – Set Handsfree echo canceller#SHFEC – set handsfree echo cancellerExecute commandRead commandAT#SHFEC? Return the current status in the format:   #SHFEC: <mode>.Write commandAT#SHFEC= <mode> Set echo canceller on audio handsfree output.Parameter <mode>:   0 - disable echo canceller for headset mode (default)   1 - enable, setting for handsfree mode   2…255 reserved Note: This setting returns to default after power off.Test commandAT#SHFEC=? Returns the supported range of values of the parameter <mode>.ExampleReference Telit GM862-PCS AT Command SpecificationSW release Version A
Page 159 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.17  #HFMICG – Handsfree Microphone Gain#HFMICG – handsfree microphone gainExecute commandRead commandAT#HFMICG? Return the current status of handsfree input gain in the format:#HFMICG: <level>Write commandAT#HFMICG = <level> Set the microphone input gainParameter:<level>: handsfree microphone input gain0 - 7 handsfree microphone gain (+6dB/step)8…255 reservedTest commandAT#HFMICG=? Returns the supported range of values of the parameter <level>.ExampleReference Telit GM862-PCS AT Command SpecificationSW release Version A2.7.1.18 #HSMICG – Handset Microphone Gain#HSMICG – handset microphone gainExecute commandRead commandAT#HSMICG? Return the current status of handset input gain in the format:#HSMICG: <level>Write commandAT#HSMICG = <level> Set the microphone input gainParameter:<level>: handset microphone input gain0 - 7 handset microphone gain (+6dB/step)8…255 reservedTest commandAT#HSMICG=? Returns the supported range of values of the parameter <level>.ExampleReference Telit GM862-PCS AT Command SpecificationSW release Version A
Page 160 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.19  #SHFSD – Set Handsfree side tone#SHFSD – set handsfree side toneExecute commandRead commandAT#SHFSD? Return the current status in the format:#SHFSD: <mode>Write commandAT#SHFSD = <mode> Set the sidetone on handsfree audio output.Parameter<mode>: 0 - disabled - headset mode (default) 1 - enabled - handsfree mode 2…255 reservedNote: This setting returns to default after power off.Test commandAT#SHFSD=? Returns the supported range of values of the parameter <mode>.ExampleReference Telit GM862-PCS AT Command SpecificationSW release Version A2.7.1.20 #/ – Repeat last command#/ – Repeat last commandExecute commandAT#/It is used to execute again the last received command.Note: This command replaces the A/ commandRead commandWrite commandTest commandExampleReference Telit GM862-PCS AT Command SpecificationSW release Version A
Page 161 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.7.1.21 #BND – Select Band  (DCS 1800 or PCS 1900)#BND – Select Band (DCS1800 or PCS1900)Execute commandRead commandAT#BND? Return the current band selected in the format:#BND: <band>Write commandAT#BND = <band> Set the band parameter to the Band value.Parameter<band>: 0 - DCS 1800MHz 1 - PCS 1900MHzNote: This setting is maintained even after power off.Test commandAT#BND=? Returns the supported range of values of the parameter <band>.ExampleReference Telit GM862-PCS AT Command SpecificationSW release Version A
Page 162 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.8 FAX Class 1 Commands2.8.1  General configuration2.8.1.1 +FCLASS - select active service class+FCLASS - select active service classExecute commandRead commandAT+FCLASS? Returns the current configuration value of the parameter <n>.Write commandAT+FCLASS= <n> Set the GM862-PCS in specified connection mode (data, fax, voice), henceall the calls done after, will be data or voice.Parameter:<n>:     0 = data<n>:     1 = fax class 1<n>:     8 = voiceTest commandAT+FCLASS=? Returns all supported values of the parameters <n>.ExampleReference ITU T.31 and TIA/EIA-578-A specifications / GSM 07.07SW release Version A
Page 163 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.8.1.2  +FMI – Report manufacturer ID+FMI – Report manufacturer IDExecute commandRead commandAT+FMI? Reports the manufacturer IDWrite commandTest commandExample AT+FMI?Telit Mobile TerminalsOKReference ITU T.31 and TIA/EIA-578-A specificationsSW release Version A2.8.1.3 +FMM? – Report model ID+FMM – Report model IDExecute commandRead commandAT+FMM? Reports the model IDWrite commandTest commandExample AT+FMM?GM862-PCS - GSM900/1800 voice/data/fax moduleOKReference ITU T.31 and TIA/EIA-578-A specificationsSW release Version A
Page 164 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.8.1.4  +FMR – Report revision ID+FMR – Report revision IDExecute commandRead commandAT+FMR? Reports the software revision IDWrite commandTest commandExample AT+FMR?1.01.000 CS988OKReference ITU T.31 and TIA/EIA-578-A specificationsSW release Version A2.8.2  Transmission/Reception control2.8.2.1  +FTS – Stop Transmission and pause+FTS – Stop transmission and pauseExecute commandRead commandWrite commandAT+FTS=<time> This command causes the modem to terminate a transmission and waitfor <time> 10 ms intervals before responding with the OK result code.Parameter <time>0-255 : length of time in 10ms intervals of the pauseTest commandAT+FTS=? Returns all supported values of the parameters <time>.ExampleReference ITU T.31 and TIA/EIA-578-A specificationsSW release Version A
Page 165 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.8.2.2  +FRS – Wait for receive silence+FRS – Wait for receive silenceExecute commandRead commandWrite commandAT+FRS=<time> this command causes the modem to listen and report an OK result codewhen silence has been detected for the specified period of time.This command when the required silence period is detected or whenthe DTE sends another character other than XON or XOFF.Parameter <time>0-255 : length of time in 10ms intervals of the pauseTest commandAT+FTS=? Returns all supported values of the parameters <time>.ExampleReference ITU T.31 and TIA/EIA-578-A specificationsSW release Version A2.8.2.3  +FTM – Transmit data modulation+FTM – Transmit dataExecute commandRead commandWrite commandAT+FTM=<mod> this command causes the module to transmit facsimile data using themodulation defined by the parameter <mod>.parameter <mod> : carrier modulation 24 - V27ter/2400 bps 48 - V27ter/4800 bps 72 - V29/7200 bps 96 - V29/9600 bpsTest commandAT+FTM=? Returns all supported values of the parameters <mod>.ExampleReference ITU T.31 and TIA/EIA-578-A specificationsSW release Version A
Page 166 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.8.2.4  +FRM – Receive data modulation+FRM – Receive data modulationExecute commandRead commandWrite commandAT+FRM=<mod> this command causes the module to receive facsimile data using themodulation defined by the parameter <mod>.parameter <mod> : carrier modulation 24 - V27ter/2400 bps 48 - V27ter/4800 bps 72 - V29/7200 bps 96 - V29/9600 bpsTest commandAT+FRM=? Returns all supported values of the parameters <mod>.ExampleReference ITU T.31 and TIA/EIA-578-A specificationsSW release Version A2.8.2.5  +FTH – Transmit data with HDLC framing+FTH – Transmit data with HDLC framingExecute commandRead commandWrite commandAT+FTH=<mod> this command causes the module to transmit facsimile data usingHDLC protocol and the modulation defined by the parameter <mod>.parameter <mod> : carrier modulation 3 - V21/300 bpsTest commandAT+FTH=? Returns all supported values of the parameters <mod>.ExampleReference ITU T.31 and TIA/EIA-578-A specificationsSW release Version A
Page 167 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.8.2.6  +FRH – Receive data with HDLC framing+FRH – Receive data data with HDLC framingExecute commandRead commandWrite commandAT+FRH=<mod> this command causes the module to receive facsimile data using HDLCprotocol and the modulation defined by the parameter <mod>.parameter <mod> : carrier modulation 3 - V21/300 bpsTest commandAT+FRH=? Returns all supported values of the parameters <mod>.ExampleReference ITU T.31 and TIA/EIA-578-A specificationsSW release Version A2.8.3   Serial port control2.8.3.1  +FLO – Select flow control specified by type+FLO – Select flow control specified by typeExecute commandRead commandWrite commandAT+FLO=<type> Selects the flow control behavior of the serial port in both directions:from DTE to DTA and from DTA to DTEParameter:<type> - flow control option for the data on the serial port  0 - flow control None  1 - flow control Software (XON-XOFF)  2 - flow control Hardware (CTS-RTS)Note: This command is a shortcut of the +IFC command.Test commandAT+FLO=? Returns all supported values of the parameters <type>.ExampleReference ITU T.31 and TIA/EIA-578-A specificationsSW release Version A
Page 168 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.8.3.2  +FPR – Select serial port rate+FPR – Select serial port rateExecute commandRead commandWrite commandAT+FPR=<rate> Selects the the serial port speed in both directions: from DTE to DTAand from DTA to DTE. When autobauding is selected, then the speedis detected automatically.Parameter:<rate> - serial port speed selection  0 - autobaudingTest commandAT+FPR=? Returns all supported values of the parameters <rate>.ExampleReference ITU T.31 and TIA/EIA-578-A specificationsSW release Version A2.8.3.3  +FDD – Double escape character replacement control+FDD – Double escape character replacement controlExecute commandRead commandWrite commandAT+FDD=<mode> This command sets the double escape character replacement behaviorof the module depending on the parameter <mode>.Parameter<mode>= 0     DCE decode of <DLE><SUB>:    <DLE><DLE> or discard     DCE encode of <1/0><1/0>:    <DLE><DLE><DLE><DLE>Test commandAT+FDD=? Returns all supported values of the parameters <mode>.ExampleReference ITU T.31 and TIA/EIA-578-A specificationsSW release Version A
Page 169 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.9  Easy GPRS Extension2.9.1  OverviewThe Easy GPRS feature applies only to the Telit GM862-PCS and allows a Telit GM862-PCS userto contact a device in internet and establish with it a raw data flow over the GPRS and Internetnetworks.This feature can be seen as a way to obtain a "virtual" serial connection between the ApplicationSoftware on the Internet machine involved and the controller of the Telit GM862-PCS  module,regardless of all the software stacks underlying.An example of the protocol stack involved in the devices is reported:This particular implementation allows to the devices interfacing to the Telit GM862-PCS modulethe use of the GPRS and Internet packet service without the need to have an internal TCP/IP stacksince this function is embedded inside the module.2.9.2  Easy GPRS definitionThe Easy GPRS feature provides a way to replace the need of an Internet TCP/IP stack at theterminal equipment side. The steps that will be required to obtain a virtual serial connection (that isactually a socket) to the Internet peer are:a) configuring the GPRS Accessb) configuring the embedded TCP/IP stack behaviourc) defining the Internet Peer to be contactedd) request the GPRS and socket connections to be opened (host is connected)e) exchange raw dataf) close the socket and GPRS contextRemoteControllerDeviceDevice(Internet) Local RemoteApplicationApplicationTCP/UDPEASYEASYTCP/UDPGPRSGPRSIPIPIPIPSerialDataLine onDriverBoardL2L2V.24V.24L1L1Terminal EquipmentRemote Device  (Internet) TelitGM862-GPRSnetworks<<<----------------------------------   Virtual Serial link   ---------------------------------->>>network interworkingMobile Terminal GPRS Network and Internet
Page 170 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1All these steps are achieved through AT commands.As for common modem interface, two logical status are involved: command mode and data trafficmode.- In Command Mode (CM), some AT commands are provided to configure the Data ModuleInternet stack and to start up the data traffic.- In data traffic mode (Socket Mode, SKTM), the client can send/receive a raw data stream whichwill be encapsulated in the previously configured TCP / IP packets which will be sent to theother side of the network and viceversa. Control plane of ongoing socket connection isdeployed internally to the module.2.9.2.1  Configuring the GPRS accessThe GPRS access configuration is done by setting:- the GPRS context number 1 parameters (see +CGDCONT command)- the Authentication parameters: User Name and Password (see commands #USERID, #PASSW)2.9.2.2  Configuring the embedded TCP/IP stackThe TCP/IP stack behaviour must be configured by setting:- the packetizer default packet size (see command  #PKTSZ)- the data sending timeout  (see command  #DSTO)- the socket inactivity timeout (see command  #SKTTO)2.9.2.3  Defining the Internet peer to be contactedAs last setting definition, the host to be contacted and on which port/protocol must be set :- the socket definition (see command  #SKTSET)This command permits also to specify the host name instead of its IP address, if a host name isgiven to the set command, then the module stores it as a host nick name.  It is care of the moduleuser to guarantee that the host nick name provided corresponds to an existing internet peer.If an host nick name has been given then, while opening the connection in response to theAT#SKTOP command, the module will autonomously activate a GPRS connection and query itsDNS to obtain the IP address relative to the host nick name provided. This process of contextactivation and DNS query may require a bit more time and requires that the GPRS networkcoverage is good enough to permit data transfers.2.9.2.4  Open the connection with the internet hostWith the AT#SKTOP all the process required to connect with the internet host starts:- GM862-PCS activates the first context- GM862-PCS proceeds to the authentication with the parameters specified on par. 2.9.2.1- Eventually does the DNS query to resolve the IP address of the host name internet peer
Page 171 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1- GM862-PCS establishes a TCP/UDP (depending on the parameter request) connection with thegiven internet host- Once the connection is up the module reports the code: CONNECTFrom this moment the data incoming in the serial port is packet and sent to the Internet host, whilethe data received from the host is serialised and flushed to the Terminal Equipment.2.9.2.5  Close the Socket and deactivate the contextThe connection can be closed because of:- remote host TCP connection close- socket inactivity timeout- Terminal Equipment by issuing the escape sequence "+++"- Network deactivationNote: if in the raw data to be sent there's an  escape sequence, then the TE must work it out and sentit in a different fashion to guarantee that the connection is not closed.The pause time is defined in the parameter S12.On the reception of an escape sequence the GM862-PCS closes the connection, deactivates theGPRS context returning to command mode  and issuing the NO CARRIER code.2.9.3  Known limitationsThe implementation of the EASY GPRS feature has the following known limitations:- Only one socket can be opened at a time, no multiple socket connections can be made;- Only the first GPRS context is associated with this feature;- The closing of a socket implies always the deactivation of the GPRS context associated;- It is taken for granted that external processor will be able to handle at least a limited v.24implementation: RTS, CTS and, highly recommended, DCD lines; this because software flowcontrol is not applicable to the feature;- Only Mobile initiated connections can be made, it is not possible to receive incoming TCPconnection requests;- Due to the particularity of this feature, the flow control of both the directions uplink anddownlink is interlocked
Page 172 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.9.4  Easy GPRS custom AT command Definition2.9.4.1 #USERID – Authentication User ID control#USERID – Authentication User ID controlExecute commandRead commandAT#USERID? Reports the current value of the parameter <user>.Write commandAT#USERID="<user>" This command sets the user identification string to be used during theauthentication step to be the string <user>.Parameter:<user>  - authentication User ID    -  any string value up to max length reported in the Test command.Test commandAT#USERID=? Returns the maximum allowed length of the string parameter   <user>.Example AT#USERID = "myName"OKAT#USERID?#USERID: "myName"OKReference Telit specificationsSW release Version C
Page 173 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.9.4.2 #PASSW – Authentication Password control#PASSW – Authentication Password controlExecute commandRead commandAT#PASSW=? Reports the maximum password length.Write commandAT#PASSW="<pwd>" This command sets the user password string to be used during theauthentication step to be the string <pwd>.Parameter:<pwd>  - authentication password    -  any string value up to max length reported in the Test command.Test command No test command allowed, for password securityExample AT#PASSW = "myPassword"OKReference Telit specificationsSW release Version C
Page 174 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.9.4.3 #PKTSZ –Packet Size control#PKTSZ –Packet Size controlExecute commandRead commandAT#PKTSZ? Reports the current value of the parameter <size>.Write commandAT#PKTSZ=<size> This command sets the default packet size to be used by theTCP/UDP/IP stack for data sending.Parameter:<size>  - packet size in bytes  0 - automatically chosen by the device  1…512 - packet size in bytesTest commandAT#PKTSZ=? Returns the allowed values for the parameter  <size>.Example AT#PKTSZ = 100OKAT#PKTSZ?#PKTSZ: 100OKReference Telit specificationsSW release Version C
Page 175 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.9.4.4 #DSTO – Data Sending Timeout control#DSTO –Data Sending Timeout controlExecute commandRead commandAT#DSTO? Reports the current value of the parameter <time>.Write commandAT#DSTO=<time> This timeout applies when the data to be sent is less that one full packetsize and whose sending would have been delayed for a undefined timeuntil new data to be sent is received and the full packet size is reached.This command sets the maximum time that the module awaits beforesending anyway a packet whose size is less than the default one.Parameter:<time>  - packet sending timeout in 100ms units  0 - no timeout, wait forever for packets to be completed before send.  1…255 hundreds of msTest commandAT#DSTO=? Returns the allowed values for the parameter  <time>.Example AT#DSTO = 10                   ( 1 sec. Timeout )OKAT#DSTO?#DSTO: 10OKNOTE In order to avoid possible low performances issues, it is suggested toset the <time> parameter to a value greater than 5Reference Telit specificationsSW release Version C
Page 176 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.9.4.5 #SKTTO – Socket inactivity timeout control#SKTTO – Socket inactivity timeout controlExecute commandRead commandAT#SKTTO? Reports the current value of the parameter <time>.Write commandAT#SKTTO=<time> This timeout applies when the no data is exchanged in the socket for along time and therefore the socket connection is automatically closedand the GPRS context deactivated.This command sets the maximum time that the module awaits withoutdata exchange on the socket before closing the socket and deactivatingthe GPRS context.Parameter:<time>  - socket inactivity timeout in seconds units  0 - no timeout.  1…65535 sTest commandAT#SKTTO=? Returns the allowed values for the parameter  <time>.Example AT#SKTTO = 30                   ( 30 sec. Timeout )OKAT#SKTTO?#SKTTO: 30OKReference Telit specificationsSW release Version C
Page 177 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.9.4.6 #SKTSET – Socket definition control#SKTSET – Socket definition controlExecute commandRead commandAT#SKTSET?Reports the current value of the parameters<socket type>,<remote port>, <remote address>.Write commandAT#SKTSET=<sockettype>, <remote port>,"<remote address>"This command sets the socket parameters values.Parameter:<socket type>  - socket protocol type  0 - TCP  1 - UDP<remote port> - remote host port to be opened  0…65535  - port number<remote address> - address of the remote host  this parameter can be either:- any valid IP address in the format: xxx.xxx.xxx.xxx- any host name to be solved with a DNS query in the format: <hostname>Test commandAT#SKTSET=? Returns the allowed values for the parameters.Example AT#SKTSET = 0,1024,"123.124.020.007"OKOrAT#SKTSET=0,1024,"www.telit.net"OKNOTE The resolution of the host name is done when opening the socket,therefore if an invalid host name is given to the #SKTSET command,then no error message will be issued to the #SKTSET command.The DNS Query to be successful requests that:- the GPRS context 1 is correctly set with AT+CGDCONT- the authentication parameters are set (#USERID, #PASSW)- the GPRS coverage is enough to permit a connectionReference Telit specificationsSW release Version C
Page 178 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.9.4.7 #SKTOP – Socket Open command#SKTOP – Socket Open CommandExecute commandAT#SKTOP Activates the context number 1, proceeds with the authentication withthe user ID and password previously set with  #USERID #PASSWcommands, and opens a socket connection with the host specified inthe #SKTSET command. Eventually before opening the socketconnection it issues automatically a DNS query to solve the IP addressof the host name.If the connection succeeds a CONNECT indication is sent, otherwise aNO CARRIER indication is sent.Read commandWrite commandTest commandExample AT#SKTOP… GPRS context activation, authentication and socket open…CONNECTReference Telit specificationsSW release Version C2.9.4.8 #QDNS – Query DNS#QDNS – Query DNSExecute commandAT#QDNS="<hostname>"This command activates a context, authenticates and proceeds toexecute a DNS query to solve the host name into an IP address.If the DNS query is successful then the IP address will be reported inthe result code:#QDNS:"<host name>",< IP address>the <IP address> is in the format: xxx.xxx.xxx.xxxelse#QDNS:"<host name>", NOT SOLVEDRead commandWrite commandTest commandNOTE This command requires that the first context parameters, theauthentication  par. are correctly set and that the GPRS network ispresent.Reference Telit specificationsSW release Version C
Page 179 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.9.4.9 #SKTSAV – Socket Parameters Save Command#SKTSAV – Socket Parameters Save CommandExecute commandAT#SKTSAV Saves the actual Parameters of the Socket in the NVM of the device.The values stored are:- User Name- Password- Packet Size- Socket inactivity timeout- Data sending timeout- Socket type (UDP/TCP)- Remote port- Remote addressRead commandWrite commandTest commandExample AT#SKTSAVOK…socket parameters have been saved in NVMNote If some parameters have not been previously specified then a defaultvalue will be taken.Reference Telit specificationsSW release Version C
Page 180 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.9.4.10 #SKTRST – Socket Parameters Reset Command#SKTRST – Socket Parameters Reset CommandExecute commandAT#SKTRST Resets the actual Parameters of the Socket in the NVM of the device tothe default ones.The values reset are:- User Name  (none)- Password     (none)- Packet Size- Socket inactivity timeout- Data sending timeout- Socket type (UDP/TCP)- Remote port (none)- Remote address (none)Read commandWrite commandTest commandExample AT#SKTRSTOK…socket parameters have been resetReference Telit specificationsSW release Version C
Page 181 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.10 Easy Camera custom commands2.10.1.1 #CAMON – Camera  ON#CAMON – Camera ON CommandExecute commandAT#CAMONTurns ON the Camera.Read commandWrite commandTest commandExample AT#CAMONOK… camera is now powered up.Reference Telit specificationsSW release Version D2.10.1.2 #CAMOFF – Camera  OFF#CAMOFF – Camera off CommandExecute commandAT#CAMOFFTurns OFF the Camera.Read commandWrite commandTest commandExample AT#CAMOFFOK… camera is now powered down.Reference Telit specificationsSW release Version D
Page 182 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.10.1.3 #TPHOTO – Camera Take Photo#TPHOTO – Camera Take Photo CommandExecute commandAT#TPHOTOCommands the CAMERA to take the photo and stores it in the GM862memory.Read commandWrite commandTest commandNOTE The photo is kept in the GM862-PCS RAM memory, therefore after apower off it is lost.There's only 1 position for the photo, every photo will overwrite theprevious.The photo is taken during IDLE time, if the mobile is busy on networkoperations, (e.g. during a call) the photo cannot be taken.Example AT#TPHOTOOK… the camera has taken the photo and it is now stored on the GM862memory.Reference Telit specificationsSW release Version D2.10.1.4 #RPHOTO – Camera Read Photo#RPHOTO – Camera Read Photo CommandExecute commandAT#RPHOTOAfter this command the GM862 starts to flush the photo in its memoryto the serial line, ending it with the Ok code..Read commandWrite commandTest commandNOTE The photo is flushed as hexadecimal characters in the format selected.Example AT#RPHOTOxxxxxxxxxxxx  (binary digits of the JPEG image)<cr><lf>OK<cr><lf>… the photo has been flushed to the serial line.Reference Telit specificationsSW release Version D
Page 183 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.10.1.5 #CSQUAL – Camera Select Quality of Photo#CSQUAL - Camera Select Quality of PhotoExecute commandRead commandAT#CSQUAL?Reports the current value of the parameter <qual>Write commandAT#CSQUAL=<qual> This command sets the quality of the photo stored on the memory ofthe GM862-PCSParameter:<qual>  - photo quality  0 - low (Jpeg compression high - low quality of picture)  1 - medium (Jpeg compression medium - med. quality of picture)  2 - high ( Jpeg compression low - high quality of picture) - defaultTest commandAT#CSQUAL=? Returns the allowed values for the parameters.NOTE Increasing the photo quality increases its size.Example AT#CSQUAL=2OKReference Telit specificationsSW release Version D
Page 184 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.12.10.1.6 #CSMODE – Camera Select Operating MODE#CSMODE - Camera Select Operating MODEExecute commandRead commandAT#CSMODE?Reports the current value of the parameter<mode>Write commandAT#CSMODE=<mode> This command sets the operating mode of the GM862-PCS cameraParameter:<mode>  - camera operating mode  0 - daylight (short exposure)  - default  1 - nightlight (long exposure)Test commandAT#CSMODE=? Returns the allowed values for the parameters.Example AT#CSMODE=0OKReference Telit specificationsSW release Version D
Page 185 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.13 Conformity AssessmentThe Telit GM862-PCS module is assessed to be conform to the R&TTE Directive as  stand-aloneproduct, so if you use them it will not be required any further test effort on the modules.The Telit GM862-PCS module is conform with the following European Union Directives:¨ R&TTE Directive 1999/5/EC (Radio Equipment & Telecommunications Terminal Equipments)¨ Low Voltage Directive 73/23/EEC and product safety¨ Directive 89/336/EEC for conformity for EMCIn order to satisfy the essential requisite of the R&TTE 99/5/EC directive, the GM862PCS module iscompliant with the following standards:• GSM (Radio Spectrum). Standard: EN 301 511  and  3GPP 51.010-1• EMC (Electromagnetic Compatibility). Standards: EN 301 489-1 and  EN 301 489-7In this document and the Hardware User Guide, Software User Guide all the information you mayneed for developing a product meeting the R&TTE Directive is included.Furthermore the Telit GM862-PCS module is FCC Approved as module to be installedin other devices. This device is to be used only for fixed and mobile applications. Ifthe final product after integration is intended for portable use, a  new application andFCC is required.The Telit GM862-PCS module is conform with the following US Directives:¨ Use of RF Spectrum. Standards: FCC 47 Part 24 (GSM 1900)¨ EMC (Electromagnetic Compatibility). Standards:  FCC47 Part 15To meet the FCC's RF exposure rules and regulations:- The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20cm from all the persons and must not be co-located or operating in conjunction with any other antennaor transmitter.- The antenna(s) used for this module must not exceed 7 dBi for mobile and fixed or mobile operatingconfigurations.- Users and installers must be provided with antenna installation instructions and transmitter operatingconditions for satisfying RF exposure compliance.Manufacturers of mobile, fixed or portable devices incorporating this module are advised to clarify anyregulatory questions and to have their complete product tested and approved for FCC compliance.
Page 186 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1 List of acronymsACM Accumulated Call MeterASCII American Standard Code for Information InterchangeAT Attention commandsCB Cell BroadcastCBS Cell Broadcasting ServiceCCM  Call Control MeterCLIP Calling Line Identification PresentationCLIR Calling Line Identification RestrictionCMOS Complementary Metal-Oxide SemiconductorCR Carriage ReturnCSD Circuit Switched DataCTS Clear To SendDAI Digital Audio InterfaceDCD Data Carrier DetectedDCE Data Communications EquipmentDRX Data ReceiveDSR Data Set ReadyDTA Data Terminal AdaptorDTE Data Terminal EquipmentDTMF Dual Tone Multi FrequencyDTR Data Terminal ReadyEMC Electromagnetic CompatibilityETSI European Telecommunications Equipment InstituteFTA Full Type Approval (ETSI)GPRS General Radio Packet ServiceGSM Global System for Mobile communicationHF Hands FreeIMEI International Mobile Equipment IdentityIMSI International Mobile Subscriber IdentityIRA Internationale Reference AlphabetITU International Telecommunications UnionIWF Inter-Working FunctionLCD Liquid Crystal Display
Page 187 of 187TECHNICAL MANUALTelit GM862 PCSTri Band GPRS Data Terminal System Rev.1LED Light Emitting DiodeLF LinefeedME Mobile EquipmentMMI Man Machine InterfaceMO Mobile OriginatedMS Mobile StationMT Mobile TerminatedOEM Other Equipment ManufacturerPB Phone BookPDU Protocol Data UnitPH Packet HandlerPIN Personal Identity NumberPLMN Public Land Mobile NetworkPUCT Price per Unit Currency TablePUK PIN Unblocking CodeRACH Random Access ChannelRLP Radio Link ProtocolRMS Root Mean SquareRTS Ready To SendRI Ring IndicatorSCA Service Center AddressSIM Subscriber Identity ModuleSMD Surface Mounted DeviceSMS Short Message ServiceSMSC Short Message Service CenterSS Supplementary ServiceTIA Telecommunications Industry AssociationUDUB User Determined User BusyUSSD Unstructured Supplementary Service Data

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