Telit Communications S p A GM862P GSM Module User Manual o

Telit Communications S.p.A. GSM Module o

Users Manual

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Telit GM862 PCS
Tri Band GPRS Data Terminal System
TECHNICAL
MANUAL
Code: 1vv0300638
Rev. 2
Oct. 23, 2003
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
REVISION INDEX
REV
MOD.
SUBJECT OF MODIFICATION
DATE
Change pcb revision from CS1083 to CS1083a
17/07/03
Change value on a PCB components
21/10/03
SIGNATURE
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
INDEX Part1
CAP
TITLE
REV
INTRODUCTION
MECHANICAL VIEW
TECHNICAL SPECIFICATIONS
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev. 2
INTRODUCTION
The Telit GM862 PCS is a Tri Band transceiver with integrated Data Terminal Adapter
functions 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 terminal
system is in line with the following documents:
3GPP TS 51.010–1 v. 4.4.0 GSM/EDGE Radio Access Network; Digital cellular
telecommunications system (Phase 2+): Mobile Station (MS) Conformance
Specification; Part 1. Conformance Specification.
EN 301 511 Global system for mobile communications (GSM); Harmonised standard
for mobile stations in the GSM 900 and DCS 1800 bands covering essential
requirements 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; Part
7: Specific conditions for mobile and portable radio and ancillary equipment of digital
cellular radio telecommunications systems (GSM and DCS).
Page 1 of 2
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev. 2
1.1 Delta HW between GM862–PCS HW rev.1 and GM862–PCS HW rev.2
The changes that determines the difference between the GM862–PCS HW rev.1 and
the 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% 0402
See CP030041 for further details.
Page 2 of 2
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
MECHANICAL VIEW
2.1 Mechanical view Telit GM862 PCS
Page 1 of 1
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.
MODIFICA
DATA
Valido da:
Scala:
DIS
Lucà
Toll.gen.
Sostituisce il N.
Data
0260
Foglio
1:1
Verif.
Progetto
Materiale:
03.07.2003
Annotazioni:
N.fogli
Denominazione dell’oggetto:
CODICE
MECHANICAL VIEW GM862 PCS
40260NT10072
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev. 1
TECHNICAL SPECIFICATIONS
The scope of this document is to summarize the technical characteristics of the Telit
GM862 PCS Data Terminal System.
Page 1 of 1
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
Contents
GENERAL PRODUCT DESCRIPTION.................................................................................7
1.1
Dimensions .............................................................................................................................................................................7
1.2
Weight......................................................................................................................................................................................8
1.3
Environmental requirements ............................................................................................................................................8
1.3.1
Temperature range.......................................................................................................................................................8
1.3.2
Vibration Test (non functional).................................................................................................................................8
1.4
Operating Frequency...........................................................................................................................................................9
1.5
Transmitter output power..................................................................................................................................................9
1.6
Reference sensitivity.............................................................................................................................................................9
1.7
Antenna................................................................................................................................................................................ 10
1.7.1
Antenna connector.....................................................................................................................................................10
1.8
Supply voltage .................................................................................................................................................................... 12
1.9
Power consumption........................................................................................................................................................... 12
1.10
Embodied Battery charger.............................................................................................................................................. 12
1.11
User
1.11.1
1.11.2
1.11.3
1.11.4
1.11.5
1.11.6
1.11.7
1.11.8
1.11.9
1.11.10
1.11.11
1.11.12
1.11.13
1.11.14
1.11.15
1.11.16
1.11.17
1.12
Interface ..................................................................................................................................................................... 13
Speech Coding............................................................................................................................................................13
Sim Reader..................................................................................................................................................................13
SMS..............................................................................................................................................................................13
Real Time Clock and Alarm.....................................................................................................................................13
Data/fax transmission................................................................................................................................................13
Local security management......................................................................................................................................14
Call control..................................................................................................................................................................14
Phonebook...................................................................................................................................................................14
Characters management............................................................................................................................................14
SIM related functions................................................................................................................................................14
Call status indication.................................................................................................................................................14
Indication of network service availability .............................................................................................................14
Automatic answer (Voice, Data or FAX)..............................................................................................................15
Supplementary services (SS)....................................................................................................................................15
Acoustic signaling .....................................................................................................................................................15
DTMF tones................................................................................................................................................................15
Buzzer output .............................................................................................................................................................16
EMC....................................................................................................................................................................................... 16
1.13
Logic level specifications ................................................................................................................................................. 16
1.13.1
Reset signal.................................................................................................................................................................17
1.14
Audio levels specifications............................................................................................................................................... 19
1.15
Interface connectors on GM862-PCS .......................................................................................................................... 20
Page 1 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
1.16
Mounting the GM862-PCS on your Board................................................................................................................. 25
1.16.1
Antenna Coaxial cable fixing...................................................................................................................................25
1.16.2
Precautions..................................................................................................................................................................26
2.1
AT COMMAND........................................................................................................................27
Definitions............................................................................................................................................................................ 27
2.2
AT Command Syntax....................................................................................................................................................... 28
2.2.1
Command lines...........................................................................................................................................................28
2.2.2
Information responses and result codes .................................................................................................................29
2.2.3
Command Response Timeout..................................................................................................................................29
2.2.4
Command issuing timing..........................................................................................................................................32
2.2.5
Factory Profile and parameters stored in the profile ............................................................................................32
2.3
Command Availability Table ......................................................................................................................................... 33
2.4
Hayes Compliant AT Commands ................................................................................................................................. 39
2.4.1
Generic Modem Control...........................................................................................................................................39
2.4.1.1
&F - restore factory configuration.....................................................................................................................39
2.4.1.2
Z - soft reset...........................................................................................................................................................39
2.4.1.3
+FCLASS - select active service class .............................................................................................................40
2.4.1.4
&Y - designate a default reset profile ...............................................................................................................40
2.4.1.5
&W - store current configuration.......................................................................................................................41
2.4.1.6
&Z - store telephone number in the Telit GM862-PCS module internal phonebook...............................41
2.4.1.7
&N - display internal phonebook stored numbers ..........................................................................................42
2.4.1.8
+GMI - request manufacturer identification....................................................................................................42
2.4.1.9
+GMM - request model identification ..............................................................................................................42
2.4.1.10
+GMR - request revision identification............................................................................................................43
2.4.1.11
+GCAP - request capabilities list......................................................................................................................43
2.4.1.12
+GSN - request serial number............................................................................................................................43
2.4.1.13
&V - display current configuration & profile ..................................................................................................44
2.4.1.14
&V0 - display current configuration & profile ................................................................................................45
2.4.1.15
&V1 - display S registers values .......................................................................................................................45
2.4.1.16
&V2 - display last connection statistics ...........................................................................................................46
2.4.1.17
\V - single line connect message .......................................................................................................................46
2.4.1.18
%L - report line signal level................................................................................................................................47
2.4.1.19
%Q - report line quality.......................................................................................................................................47
2.4.2
DTE - modem interface control...............................................................................................................................48
2.4.2.1
E - command echo................................................................................................................................................48
2.4.2.2
Q - quiet resut codes ............................................................................................................................................48
2.4.2.3
V- result code form...............................................................................................................................................49
2.4.2.4
X - extended result codes....................................................................................................................................49
2.4.2.5
I - Request identifier and software checksum..................................................................................................50
2.4.2.6
&C - data carrier detect (DCD) control............................................................................................................50
2.4.2.7
&D - data terminal ready (DTR) control..........................................................................................................51
2.4.2.8
&K - flow control.................................................................................................................................................51
2.4.2.9
&S - data set ready (DSR) control.....................................................................................................................52
2.4.2.10
\R - ring (RI) control............................................................................................................................................53
2.4.2.11
+IPR - fixed DTE interface rate.........................................................................................................................53
2.4.2.12
+IFC - DTE - DTA flow control........................................................................................................................54
2.4.2.13
+ILRR - DTE - modem rate reporting ..............................................................................................................55
2.4.2.14
+ICF - DTE - modem character format ............................................................................................................56
2.4.3
Call Control.................................................................................................................................................................57
2.4.3.1
D - dial....................................................................................................................................................................57
2.4.3.2
T - set tone dial......................................................................................................................................................59
Page 2 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.4.3.3
2.4.3.4
2.4.3.5
2.4.3.6
2.4.3.7
2.4.3.8
2.4.3.9
2.4.4
2.4.4.1
2.4.4.2
2.4.5
2.4.5.1
2.4.5.2
2.4.6
2.4.6.1
2.4.6.2
2.4.7
2.4.7.1
2.4.7.2
2.4.7.3
2.4.7.4
2.4.7.5
2.4.7.6
2.4.7.7
2.4.7.8
2.4.7.9
2.4.7.10
2.4.7.11
2.4.7.12
Rev.1
P - set pulse dial....................................................................................................................................................59
A - answer..............................................................................................................................................................59
A/ - Last command automatic repetition ..........................................................................................................60
H - disconnect .......................................................................................................................................................60
O - return to On Line Mode................................................................................................................................61
&G - guard tone....................................................................................................................................................61
&P - pulse dial make/break ratio........................................................................................................................62
Modulation control....................................................................................................................................................62
+MS - modulation control...................................................................................................................................62
%E - enable/disable line quality monitor and auto retrain or fallback / fallforward .................................63
Compression control.................................................................................................................................................64
+DS - set data compression................................................................................................................................64
+DR - data compression reporting ....................................................................................................................64
Break control...............................................................................................................................................................65
\B - transmit break to remote..............................................................................................................................65
\K - break handling...............................................................................................................................................65
S parameters................................................................................................................................................................66
S0 - number of rings to auto answer.................................................................................................................66
S1 - ring counter...................................................................................................................................................66
S2 - escape character............................................................................................................................................67
S3 - carriage return character..............................................................................................................................67
S4 - line feed character........................................................................................................................................68
S5 - backspace character.....................................................................................................................................68
S7 - wait time for carrier, silence or dial tone .................................................................................................69
S10 - lost carrier to hang up delay.....................................................................................................................69
S12 - escape prompt delay ..................................................................................................................................70
S25 - delay to DTR off.........................................................................................................................................70
S30 - disconnect inactivity timer........................................................................................................................71
S38 - delay before forced hang up.....................................................................................................................71
2.5
ETSI GSM 07.07 AT Commands .................................................................................................................................. 72
2.5.1
General.........................................................................................................................................................................72
2.5.1.1
+CGMI - request manufacturer identification.................................................................................................72
2.5.1.2
+CGMM - request model identification ...........................................................................................................72
2.5.1.3
+CGMR - request revision identification.........................................................................................................72
2.5.1.4
+CGSN - request product serial number identification..................................................................................73
2.5.1.5
+CSCS - select TE character set........................................................................................................................73
2.5.1.6
+CIMI - request international mobile subscriber identity (IMSI)................................................................74
2.5.2
Call control..................................................................................................................................................................75
2.5.2.1
+CBST - select bearer service type ...................................................................................................................75
2.5.2.2
+CRLP - radio link protocol...............................................................................................................................76
2.5.2.3
+CR - service reporting control.........................................................................................................................77
2.5.2.4
+CEER - extended error report ..........................................................................................................................78
2.5.2.5
+CRC - cellular result codes ..............................................................................................................................79
2.5.3
Network service handling.........................................................................................................................................80
2.5.3.1
+CNUM - subscriber number.............................................................................................................................80
2.5.3.2
+CREG - network registration report................................................................................................................81
2.5.3.3
+COPS - operator selection ................................................................................................................................83
2.5.3.4
+CLCK - facility lock/ unlock............................................................................................................................84
2.5.3.5
+CPWD - change facility password ..................................................................................................................85
2.5.3.6
+CLIP - calling line identification presentation..............................................................................................86
2.5.3.7
+CLIR - calling line identification restriction .................................................................................................87
2.5.3.8
+CCFC - call forwarding number and conditions ..........................................................................................88
2.5.3.9
+CCWA - call waiting.........................................................................................................................................90
2.5.3.10
+CHLD - call holding services ..........................................................................................................................91
2.5.3.11
+CUSD - unstructured supplementary service data........................................................................................92
2.5.3.12
+CAOC - advice of charge..................................................................................................................................94
Page 3 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.5.3.13
2.5.3.14
5.4.3.15
2.5.4
2.5.4.1
2.5.4.2
2.5.4.3
2.5.4.4
2.5.4.5
2.5.4.6
2.5.4.7
2.5.4.8
2.5.4.9
2.5.4.10
2.5.4.11
2.5.4.12
2.5.4.13
2.5.4.14
2.5.4.15
2.5.4.16
2.5.4.17
2.5.5
2.5.5.1
2.5.5.2
2.5.6
2.5.6.1
2.5.7
2.5.7.1
2.5.7.2
2.5.7.3
2.5.7.4
3.3.7.1
2.5.7.5
3.3.7.2
3.3.7.3
2.5.8
2.5.8.1
Rev.1
+CLCC - list current calls ..................................................................................................................................95
+CSSN – SS Notification....................................................................................................................................96
+CCUG – Closed User Group supplementary service control....................................................................97
Mobile Equipment control........................................................................................................................................98
+CPAS - phone activity status ..........................................................................................................................98
+CFUN Set phone functionality (Power Saving Management)...................................................................99
+CPIN - enter PIN..............................................................................................................................................100
+CSQ- signal quality..........................................................................................................................................102
+CPBS - select phonebook memory storage .................................................................................................103
+CPBR - read phonebook entries ....................................................................................................................104
+CPBF - find phonebook entries .....................................................................................................................105
+CPBW - write phonebook entry ....................................................................................................................106
+CCLK - Clock Management ..........................................................................................................................107
+CALA - Alarm Management .........................................................................................................................108
+CALM - alert sound mode..............................................................................................................................110
+CRSL - ringer sound level..............................................................................................................................110
+CLVL - loudspeaker volume level................................................................................................................111
+CMUT - microphone mute control...............................................................................................................111
+CACM - accumulated call meter...................................................................................................................112
+CAMM - accumulated call meter maximum...............................................................................................112
+CPUC - price per unit and currency table ....................................................................................................113
Mobile equipment errors.........................................................................................................................................114
+CMEE - report mobile equipment error.......................................................................................................114
+CME ERROR: - ME error result code .........................................................................................................115
Voice Control (TIA IS-101)...................................................................................................................................116
+VTS: - DTMF tones transmission.................................................................................................................116
Commands For GPRS .............................................................................................................................................117
+CGACT - PDP context activate or deactivate.............................................................................................117
+CGATT - GPRS attach or detach..................................................................................................................118
+CGDATA - Enter data state...........................................................................................................................119
+CGDCONT - define PDP context .................................................................................................................120
+CGPADDR - show PDP address ..................................................................................................................121
+CGREG - GPRS network registration status ..............................................................................................122
+CGQMIN - quality of service profile (minimum acceptable)..................................................................123
+CGQREQ - quality of service profile (requested)......................................................................................124
Commands For Battery Charger............................................................................................................................125
+CBC - Battery Charge .....................................................................................................................................125
2.6
ETSI GSM 07.05 AT Commands for SMS and CB services ...............................................................................126
2.6.1
General configuration..............................................................................................................................................126
2.6.1.1
+CSMS - select message service.....................................................................................................................126
2.6.1.2
+CPMS - preferred message storage...............................................................................................................127
2.6.1.3
+CMGF - message format.................................................................................................................................128
2.6.1.4
+CSMP – Set parameters in text mode...........................................................................................................128
2.6.1.5
+CSDH – Show parameters in text mode.......................................................................................................129
2.6.1.6
+CSAS – Save setting text mode.....................................................................................................................129
2.6.1.7
+CRES – Restore text mode settings ..............................................................................................................130
2.6.1.8
+CSCB – Select Cell Broadcast Message types ...........................................................................................131
2.6.1.9
+CMS ERROR - message service failure result code..................................................................................132
2.6.2
Message configuration............................................................................................................................................133
2.6.2.1
+CSCA - service center address......................................................................................................................133
2.6.3
Message receiving and reading .............................................................................................................................134
2.6.3.1
+CNMI - new message indications to Terminal Equipment.......................................................................134
2.6.3.2
+CMGL - list messages .....................................................................................................................................136
2.6.3.3
+CMGR - read message....................................................................................................................................138
2.6.4
Message sending and writing.................................................................................................................................140
2.6.4.1
+CMGS - send message ....................................................................................................................................140
Page 4 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.6.4.2
2.6.4.3
2.6.4.4
Rev.1
+CMSS - send message from storage.............................................................................................................141
+CMGW - write message to memory ............................................................................................................142
+CMGD - delete message.................................................................................................................................143
2.7
Custom AT Commands ..................................................................................................................................................144
2.7.1
General configuration..............................................................................................................................................144
2.7.1.1
#CAP - Change Audio Path..............................................................................................................................144
2.7.1.2
#SRS - Select ringer sound...............................................................................................................................145
2.7.1.3
#SRP –Select Ringer Path.................................................................................................................................146
2.7.1.4
#STM - Signalling Tones Mode ......................................................................................................................147
2.7.1.5
#PCT – display PIN Counter............................................................................................................................147
2.7.1.6
#SHDN – Software Shut Down .......................................................................................................................148
2.7.1.7
#WAKE – Wake from Alarm mode................................................................................................................149
2.7.1.8
#QTEMP –Query Temperature overflow.......................................................................................................150
2.7.1.9
#SGPO –Set General Purpose Output ............................................................................................................151
2.7.1.10
#GGPI – Read General Purpose Input............................................................................................................152
2.7.1.11
#GPIO –General Purpose Input/Output pin control.....................................................................................153
2.7.1.12
#MONI – Monitor Cells ....................................................................................................................................155
2.7.1.13
#QSS – Query SIM Status................................................................................................................................156
2.7.1.14
#ACAL – Set Automatic Call...........................................................................................................................157
2.7.1.15
#SMOV – SMS Overflow.................................................................................................................................158
2.7.1.16
#SHFEC – Set Handsfree echo canceller.......................................................................................................158
2.7.1.17
#HFMICG – Handsfree Microphone Gain.....................................................................................................159
2.7.1.18
#HSMICG – Handset Microphone Gain ........................................................................................................159
2.7.1.19
#SHFSD – Set Handsfree side tone ................................................................................................................160
2.7.1.20
#/ – Repeat last command .................................................................................................................................160
2.7.1.21
#BND – Select Band (DCS 1800 or PCS 1900)...........................................................................................161
2.8
FAX Class 1 Commands ................................................................................................................................................162
2.8.1
General configuration..............................................................................................................................................162
2.8.1.1
+FCLASS - select active service class ...........................................................................................................162
2.8.1.2
+FMI – Report manufacturer ID......................................................................................................................163
2.8.1.3
+FMM? – Report model ID ..............................................................................................................................163
2.8.1.4
+FMR – Report revision ID..............................................................................................................................164
2.8.2
Transmission/Reception control............................................................................................................................164
2.8.2.1
+FTS – Stop Transmission and pause............................................................................................................164
2.8.2.2
+FRS – Wait for receive silence ......................................................................................................................165
2.8.2.3
+FTM – Transmit data modulation .................................................................................................................165
2.8.2.4
+FRM – Receive data modulation...................................................................................................................166
2.8.2.5
+FTH – Transmit data with HDLC framing..................................................................................................166
2.8.2.6
+FRH – Receive data with HDLC framing....................................................................................................167
2.8.3
Serial port control.....................................................................................................................................................167
2.8.3.1
+FLO – Select flow control specified by type...............................................................................................167
2.8.3.2
+FPR – Select serial port rate...........................................................................................................................168
2.8.3.3
+FDD – Double escape character replacement control................................................................................168
2.9
Easy
2.9.1
2.9.2
2.9.2.1
2.9.2.2
2.9.2.3
2.9.2.4
2.9.2.5
2.9.3
2.9.4
2.9.4.1
GPRS Extension.....................................................................................................................................................169
Overview...................................................................................................................................................................169
Easy GPRS definition..............................................................................................................................................169
Configuring the GPRS access..........................................................................................................................170
Configuring the embedded TCP/IP stack.......................................................................................................170
Defining the Internet peer to be contacted .....................................................................................................170
Open the connection with the internet host...................................................................................................170
Close the Socket and deactivate the context ..................................................................................................171
Known limitations ...................................................................................................................................................171
Easy GPRS custom AT command Definition.....................................................................................................172
#USERID – Authentication User ID control.................................................................................................172
Page 5 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.9.4.2
2.9.4.3
2.9.4.4
2.9.4.5
2.9.4.6
2.9.4.7
2.9.4.8
2.9.4.9
2.9.4.10
Rev.1
#PASSW – Authentication Password control...............................................................................................173
#PKTSZ –Packet Size control..........................................................................................................................174
#DSTO – Data Sending Timeout control.......................................................................................................175
#SKTTO – Socket inactivity timeout control................................................................................................176
#SKTSET – Socket definition control............................................................................................................177
#SKTOP – Socket Open command .................................................................................................................178
#QDNS – Query DNS........................................................................................................................................178
#SKTSAV – Socket Parameters Save Command.........................................................................................179
#SKTRST – Socket Parameters Reset Command.........................................................................................180
2.10
Easy Camera custom commands .................................................................................................................................181
2.10.1.1
#CAMON – Camera ON..................................................................................................................................181
2.10.1.2
#CAMOFF – Camera OFF...............................................................................................................................181
2.10.1.3
#TPHOTO – Camera Take Photo....................................................................................................................182
2.10.1.4
#RPHOTO – Camera Read Photo ...................................................................................................................182
2.10.1.5
#CSQUAL – Camera Select Quality of Photo ..............................................................................................183
2.10.1.6
#CSMODE – Camera Select Operating MODE............................................................................................184
CONFORMITY ASSESSMENT ......................................................................................... 185
LIST OF ACRONYMS ................................................................................................................. 186
Page 6 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
1 General Product Description
1.1 Dimensions
The Telit GM862-PCS module overall dimension are:
•
Lenght:
43.9 mm
•
Width:
43.9 mm
•
Thickness:
6.9 mm
•
Volume:
≅ 13 cm3
The layout of Telit GM862-PCS module is shown in the following figure:
Page 7 of 187
Rev.1
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
1.2 Weight
The Telit GM862-PCS module weight is 23 gr with shield and 16 gr without shield.
1.3 Environmental requirements
The Telit GM862-PCS module is compliant with the applicable ETSI reference documentation
GSM 05.05 Release1999 ETSI EN300910 V8.4.1
1.3.1Temperature 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 module
1.3.2Vibration Test (non functional)
•
10 ÷12Hz
ASD = 1.92m 2 /s 3
Page 8 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
•
Rev.1
12 ÷ 150Hz –3dB/oct
1.4 Operating Frequency
The operating frequencies in GSM, DCS, PCS modes are conform to the GSM specifications.
Mode
Freq. TX (MHz) Freq. RX (MHz) Channels (ARFC) TX - RX offset
E-GSM-900 890.0 - 914.8
880.2 - 889.8
DCS-1800 1710.2 - 1784.8
935.0 - 959.8
925.2 - 934.8
1805.2 - 1879.8
0 – 124
975 - 1023
512 – 885
45 MHz
PCS-1900
1930.2 - 1989.8
512 - 810
80 MHz
1850.2 - 1909.8
95 MHz
NOTE: PCS 1900 is supported only in the Telit GM862-PCS module
1.5 Transmitter output power
GSM–900
The GM862-PCS transceiver module in GSM–900 operating mode are of class 4 in accordance
with the specification which determine the nominal 2W peak RF power (+33dBm) on 50 Ohm.
DCS–1800
The GM862-PCS transceiver module in DCS–1800 operating mode are of class 1 in accordance
with the specifications which determine the nominal 1W peak RF power (+30dBm) on 50 Ohm.
PCS–1900
The GM862-PCS transceiver module in PCS–1900 operating mode are of class 1 in accordance
with the specifications which determine the nominal 1W peak RF power (+30dBm) on 50 Ohm.
1.6 Reference sensitivity
GSM–900
The sensitivity of the GM862-PCS transceiver module according to the specifications for the class 4
GSM–900 portable terminals is better than –102dBm in all the operational conditions.
DCS–1800
The sensitivity of the GM862-PCS transceiver module according to the specifications for the class 1
portable terminals GSM 1800 is better than –102dBm in normal operating conditions.
PCS–1900
The sensitivity of the GM862-PCS transceiver module according to the specifications for the class 1
portable terminals PCS 1900 is better than –102dBm in normal operating conditions.
Page 9 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
1.7 Antenna
The antenna that the customer chooses to use, depending on his application, should fulfil the
following requirements:
Frequency range
Gain
Impedance
Standard Dual Band frequency range,
Standard Tri Band frequency range for -PCS
80 MHz in GSM & 170 MHz in DCS & 140
MHz PCS band
> 0 dB (referenced to l/2 dipole)
50 ohm
Input power
> 2 W peak power
Bandwith
NOTE: PCS 1900 frequency coverage is required only for the Telit GM862-PCS module
1.7.1 Antenna connector
The Telit GM862-PCS module includes a 50 Ohm MMCX coaxial female 2 PIN Angle Coax SMD
J01341A0081 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 10 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
connector is locatable at:
Telegärtner - K. Gärtner GmbH
Lerchenstrasse 35, D-71144 Steinenbronn
Phone: (+49) 71 57 125 100
NOTE: be very careful when connecting the Telit GM862-PCS module RF connector. The Telit
GM862-PCS module RF connector can be damaged if not connected with the proper antenna
RF connector. The minimum number of insertion cycles are recommended.
Page 11 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
1.8 Supply voltage
The external power supply must be connected to VBATT signal (see paragraph 1.15,Interface
connectors on GM862-PCS) and must fulfil the following requirements:
•
Nominal operating voltage
3.8 V
•
Operating voltage range
3.4 V - 4.2 V
1.9 Power consumption
The 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 conditions
1.10
Embodied Battery charger
This 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 less
performances also with different technology batteries. The Charger needs only 1 CURRENT
LIMITED 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
Battery type
400mA
Rechargeable Li-Ion
NOTE: If embodied battery charger is used, then a LOW ESR capacitor of at least 100µF must be
mounted in parallel to VBATT GM862-PCS pins.
NOTE: when power is supplied to the CHARGE pin, a battery must always be connected to the
VBATT pins of the GM862-PCS.
Page 12 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
1.11
Rev.1
User Interface
The user interface is managed by AT commands specified on the GSM 07.07 and 07.05
specification and listed in the chapter 2, AT Command.
1.11.1
Speech Coding
The Telit GM862-PCS vocoder supports the following rates:
•
Half Rate.
•
Full rate,
•
Enhanced Full Rate
1.11.2
Sim Reader
The Telit GM862-PCS support phase 2 GSM11.14 - SIM 3 volts ONLY. For 5V SIM operation an
external level translator can be added.
Furthermore the Telit GM862-PCS have an internal built-in SIM card reader, so there's no need for
an external SIM housing.
The Telit GM862-PCS has an enhanced internal built-in SIM card reader that allows also hot
removal of the SIM sensing, so there's no need for an external SIM housing.
1.11.3
SMS
The Telit GM862-PCS module supports the following SMS types:
Mobile Terminated (MT) class 0 – 2 with signalling of new incoming SMS, SIM full, SMS read
Mobile Originated class 0 – 3 with writing, memorise in SIM and sending
Cell Broadcast compatible with CB DRX with signalling of new incoming SMS.
1.11.4
Real Time Clock and Alarm
The Telit GM862-PCS module supports the Real Time Clock and Alarm functions through AT
commands, furthermore an alarm output pin (GPIO6) can be configured to indicate the alarm with a
hardware line output.
1.11.5
Data/fax transmission
The 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 13 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
1.11.6
Rev.1
Local security management
With lock of Subscriber Identity module (SIM), and security code request at power–up.
1.11.7
Call control
Call cost control function.
1.11.8
Phonebook
Function available to store the telephone numbers in SIM memory.
Capability depends on SIM version/memory
1.11.9
Characters management
Availability of lowercase, uppercase and IRA characters. (international reference alphabet)
In SMS PDU mode all character set are supported.
1.11.10 SIM related functions
Activation/deactivation of the numbers stored in phone book FDN, ADN and PINs. Extension at the
PIN2 for the PUK2 insertion capability for lock condition.
1.11.11 Call status indication
By AT commands.
1.11.12 Indication of network service availability
By 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 show
information on the network service availability and Call status.
STAT_LED indications
LED status
permanently off
Device Status
device off
fast blinking
(period 1s, Ton 0,5s)
Net search / Not
registered / turning
off
slow blinking
(period 3s, Ton 0,3s)
Registered full
service
permanently on
a call is active
Page 14 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
1.11.13 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 signaling
The acoustic signalling of Telit GM862-PCS module on the selected acoustic device are the
following:
•
•
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 tones
DTMF 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 15 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
Group high
Group low
1209 Hz
1336 Hz
1477 Hz
697 Hz
770 Hz
852 Hz
941 Hz
1.11.17 Buzzer output
The General Purpose I/O pin GPIO7 can be configured to output the BUZZER output signal, with
only 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 a
specific AT command.
1.12
EMC
Compliant to & ETS 300–342–1 and all applicable GSM Specifications.
Compliant to Directive 1999/05/CE.
1.13
Logic level specifications
Where 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 module
interface circuits:
Absolute Maximum Ratings -Not Functional
Parameter
Min
Max
Input level on any
digital pin when on
-0.3V
+3.75V
Input voltage on
-0.3V
analog pins when on
+3.0 V
Page 16 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
Operating Range - Interface levels (2.8V CMOS)
Level
Min
Max
Input high level
2.1V
3.3V
Input low level
Output high level
0V
2.2V
0.5V
3.0V
Output low level
0V
0.35V
For 2,0V signals:
Operating Range - Interface levels (2.0V CMOS)
1.13.1
Level
Input high level
Min
1.6V
Max
3.3V
Input low level
0V
0.4V
Output high level
1,65V
2.2V
Output low level
0V
0.35V
Reset signal
Signal
Function
I/O
Pin
RESET
Phone reset
I/O
23 (connector SO301)
RESET is used to reset the Telit GM862-PCS module. Whenever this signal is pulled low, the
GM862 is reset. When the device is reset it stops any operation and after the release of the reset it
shuts down, without doing any detach operation from the network where it is registered to. This
behavior is not a proper shut down because any GSM device is requested to issue a detach request
on 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 network
response.
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 on
that is not responding to any command.
NOTE: do not use this signal to power off the Telit GM862-PCS module. Use the ON/OFF
signal (Pin 17 of SO301) to perform this function or the AT#SHDN command.
Page 17 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
Reset Signal Operating levels:
Signal
Min
Max
RESET Input high
2.2V*
3.3V
RESET 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 an
open collector transistor, to permit to the internal circuitry the power on reset and undervoltage
lockout functions.
Page 18 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
1.14
Rev.1
Audio levels specifications
The 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 separately
for the two audio paths; for the internal path the echo canceller parameters are suited to cancel the
echo 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 characteristics
Line coupling
Line type
Differential input resistance
Line nominal sensitivity
Max input voltage
Internal audio mic. input
External audio mic. input
AC ( 100nF cond.)
Balanced
AC ( 100nF cond.)
Balanced
25kΩ
50mVrms
360mVrms
25kΩ
3mVrms
22mVrms
Microphone nominal sensitivity -45dBVrms/Pa / +24dB
- Analog Gain suggested
-45dBVrms/Pa / +10dB
Echo canceller type
Handset
Car kit hands free
Internal audio ear. output
External audio ear. output
Line coupling
Line type
Speaker impedance
DC
Bridged
DC
Bridged
≥ 16Ω ± 5% @ 1kHz
≥ 16Ω ± 5% @ 1kHz
Minimun load impedance
15Ω
15Ω
Signal bandwidth
Maximum output
Maximum power output
150-8000 Hz @ -3dB
1700mVrms
30mW
150-8000 Hz @ -3dB
850mVrms
7.5mW
Volume level steps (SW)
Number of volume steps (SW)
-2dB
10
-2dB
10
Speaker characteristics
Page 19 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
1.15
Rev.1
Interface connectors on GM862-PCS
The 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 connector
3) SO402: SIM Card Reader
The GM862-PCS transceiver module interface connector SO301 is a CSTP 50 pin vertical SMD
Molex 52991–0508 (male). Its pin-out (down view) is:
49
50
Connector Position
and PIN-Out order
Antenna connector
position(on the
vertical side)
SIM CARD reader
position (on the
vertical side)
Page 20 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
Molex 52991-0508 (male) GM862-PCS Connector LAY-OUT
Page 21 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
Molex 52991-0508 (male) GM862-PCS Connector PIN-OUT
Pin Signal
I/O Function
Internal
Pull up
VBATT
Main power supply
Power
GND
Ground
Power
VBATT
Main power supply
Power
GND
Ground
Power
VBATT
Main power supply
Power
GND
Ground
Power
VBATT
Main power supply
Power
CHARGE
AI Battery Charger Input (5)
Power
EAR_HF+
AO Handsfree ear output, phase +
Audio
10
EAR_MT-
AO Handset earphone signal output, phase -
Audio
11
EAR_HF-
AO Handsfree ear output, phase -
Audio
12
EAR_MT+
AO Handset earphone signal output, phase +
Audio
13
MIC_HF-
AI Handsfree microphone input; phase -,
nominal level 3mVrms
Audio
14
MIC_MT+
AI Handset microphone signal input; phase+,
nominal level 50mVrms
Audio
15
MIC_HF+
AI Handsfree microphone input; phase +,
nominal level 3mVrms
Audio
16
MIC_MT-
AI Handset microphone signal input; phase-,
nominal level 50mVrms
Audio
17
ON/OFF
Input command for switching power ON or 10KΩ
OFF (toggle command). The pulse to be
sent to the GM862 must be equal or greater
than 1 second.
CMOS 2.8V
18
AXE
Handsfree switching
2.0V signal
19
SIMIO
I/O External SIM signal - Data I/O
3V ONLY
20
C103/TXD
Serial data input (TXD) from DTE
CMOS 2.8V
21
PWRCTL/
CAM_SYNC
Module Status ON indication (Signal
820Ω
output for power on/off control of external
devices) /
Camera interface on –PCS (4)
CMOS 2.8V
22
SIMVCC
External SIM signal – Power (3)
3V ONLY
Page 22 of 187
47KΩ
Type
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
23
RESET
Reset input
24
SIMRST
External SIM signal – Reset
25
MON1_CAM
I/O Camera Interface on –PCS (4)
CMOS 2.8V
26
SIMCLK
3V ONLY
27
CCIN
I/O External SIM signal – Presence (active
low)
28
GPIO2
General purpose output (Open Collector) /
Camera Interface on –PCS (4)
Open Collector
29
C106/CTS
Output for Clear to send signal (CTS) to
DTE
CMOS 2.8V
30
C125/RING
Output for Ring indicator signal (RI) to
DTE
CMOS 2.8V
31
GPIO1
General purpose input
transistor base
32
PD[0]
I/O Camera Interface on –PCS (4)
CMOS 2.8V
33
C107/DSR
CMOS 2.8V
34
PD[1]
I/O Camera Interface on –PCS (4)
CMOS 2.8V
35
EMMI TX
TX Data for debug monitor (1)
CMOS 2.8V
36
C109/DCD
Output for Data carrier detect signal (DCD)
to DTE
CMOS 2.8V
37
C104/RXD
Serial data output to DTE
CMOS 2.8V
38
PD[2]
I/O Camera Interface on –PCS (4)
CMOS 2.8V
39
STAT_LED
Open Collector
40
PD[3]
I/O Camera Interface on –PCS (4)
CMOS 2.8V
41
EMMI RX
CMOS 2.8V
42
PD[4]
I/O Camera Interface on –PCS (4)
CMOS 2.8V
43
C108/DTR
CMOS 2.8V
44
PD[5]
I/O Camera Interface on -PCS (4)
CMOS 2.8V
45
C105/RTS
Input for Request to send signal (RTS)
from DTE
CMOS 2.8V
46
GPIO3 /
PD[6]
I/O Configurable general purpose I/O pin /
Camera Interface on -PCS (4)
CMOS 2.8V
47
GPIO4
IICSDA
I/O Configurable general purpose I/O pin /
Camera Interface on -PCS (4)
CMOS 2.8V
2KΩ
3V ONLY
External SIM signal – Clock
Output for Data set ready signal (DSR) to
DTE
Status indicator led
RX Data for debug monitor (1)
Input for Data terminal ready signal (DTR)
from DTE (4)
Page 23 of 187
see par.1.13.1
47KΩ
CMOS 2.8V
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
48
GPIO5
CAM_DRDY
I/O Configurable general purpose I/O pin /
Camera Interface on -PCS (4)
CMOS 2.8V
49
GPIO6
/ALARM
/PD[7]
I/O GP I/O pin or ALARM output pin /
Camera Interface on -PCS (4)
CMOS 2.8V
50
GPIO7
/BUZZER
/CAM_PWR_ON
I/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 24 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
1.16
Rev.1
Mounting the GM862-PCS on your Board
In order to electrically connect your board to the Telit GM862-PCS module, use a CSTP 2x25 pin
vertical SMD SCH–SCH Molex 53748 - 0504 (female, low profile) as a counterpart to the CSTP
50 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 GM862PCS shielding reeds on a ground plane or signal.
NOTE: be very careful when connecting the Telit GM862-PCS module RF connector. The Telit
GM862-PCS module RF connector can be damaged if not connected with the proper antenna
RF connector. The minimum number of insertion cycles is recommended.
1.16.1
Antenna Coaxial cable fixing
The 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 wedge
between 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 25 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri 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 does
not 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-PCS
module in the board. This is to prevent accidental breaking of the antenna connection during the
transport.
- 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 26 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2 AT Command
The Telit GM862-PCS module can be driven via the serial interface using the standard AT
commands 1 . The Telit GM862-PCS module is compliant with:
1. Hayes standard AT command set, in order to maintain the compatibility with existing SW
programs.
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 (Cell
Broadcast Service)
4. FAX Class 1 compatible commands
Moreover the Telit GM862-PCS module supports also Telit proprietary AT commands for special
purposes.
In the following the dedicated description of how to use the AT commands with the Telit GM862PCS module.
2.1 Definitions
The following syntactical definitions apply:
 Carriage return character, is the command line and result code terminator character, which
value, in decimal ASCII between 0 and 255,is specified within parameter S3.
The default value is 13.
 Linefeed character, is the character recognised as line feed character. Its value, in decimal
ASCII 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 (V1
option used ) otherwise, if numeric format result codes are used (V0 option used) it will not appear
in the result codes.
<...>
Name enclosed in angle brackets is a syntactical element. They do not appear in the
command line.
[...]
Optional subparameter of a command or an optional part of TA information response
is enclosed in square brackets. Brackets themselves do not appear in the command line. When
subparameter is not given in AT commands which have a read command, new value equals to its
previous value. In AT commands which do not store the values of any of their subparameters, and
so have not a read command, which are called action type commands, action should be done on the
basis of the recommended default setting of the subparameter.
The AT is an ATTENTION command and is used as a prefix to other parameters in a string. The
AT command combined with other parameters can be set up in the communications package or
typed in manually as a command line instruction.
Page 27 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.2 AT Command Syntax
GSM commands use syntax rules of extended commands.
Every extended command has a test command (trailing =?) to test the existence of the command
and to give information about the type of its subparameters. There are two types of extended
command:
Parameter type commands which also have a read command (trailing ?) to check the current
values of subparameters.
Action type commands do not store the values of any of their possible subparameters, and
therefore do not have a read command.
2.2.1Command lines
The basic structure of the command lines are:
•
•
•
•
ATCMD1 where AT is the command line prefix, CMD1 is a basic command (i.e. it have
not + prefix) and CR is the command line terminator character
ATCMD2=10 where 10 is a subparameter
AT+CMD1;+CMD2=, ,10 These are two examples of extended commands (which have a
+ prefix). They are delimited with semicolon. In the second command the subparameter is
omitted
+CMD1? This is a read command for checking current subparameter values
• +CMD1=? This is a test command for checking possible subparameter values
These commands might be performed in a single command line as shown below:
ATCMD1 CMD2=10+CMD1;+CMD2=, ,10;+CMD1?;+CMD1=?
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 suggested
to 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 the
execution.
If command V1 is enabled (verbose responses codes) and all commands in a command line has
been performed successfully, result code OK 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, or
command cannot be performed for some reason, result code ERROR is sent
and no subsequent commands in the command line are processed.
If command V0 is enabled (numeric responses codes), and all commands in a command line has
been performed successfully, result code 0 is sent from the TA to the TE, if sub-parameter
values of a command are not accepted by the TA or command itself is invalid, or command cannot
be performed for some reason, result code 4 and no subsequent commands in the command
line are processed.
In case of errors depending on ME operation, ERROR (or 4) response may be replaced by +CME
ERROR:  or +CMS ERROR: .
Page 28 of 187
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.2.2 Information responses and result codes
The TA response, in case of verbose response format enabled, for the previous examples command
line could be as shown below:
information response to +CMD1?
+CMD1:2,1,10
information response to +CMD1=?
+CMD1(0-2),(0,1),(0-15)
final result code
OK
Moreover there are other two types of result codes:
•
result codes that inform about progress of TA operation (e.g. connection establishment
CONNECT)
•
result codes that indicate occurrence of an event not directly associated with issuance of a
command from TE (e.g. ring indication RING).
Here the basic result codes according to ITU-T V25Ter recommendation
Result Codes
Numeric form
Verbose form
OK
CONNECT
RING
NO CARRIER
ERROR
NO DIALTONE
BUSY
NO ANSWER
2.2.3 Command Response Timeout
Every command issued to the Telit GM862-PCS module returns a result response if response codes
are enabled (default). The time needed to process the given command and return the response varies
from command to command and may depend also from the network on which the command may
interact. As a result every command is provided with a proper timeout time, if this time elapses
without any result from the operation, then an ERROR response can be reported as if the operation
was 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 be
very 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 or
upper software layers.
Page 29 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
In the table below are listed all the commands whose timeout differs from the default 100 ms and
their effective timeout is reported:
Command
+CBST
Timeout (Seconds)
0.2
+CR
0.2
+CRC
0.2
+CRLP
+CSCS
0.2
0.2
+CEER
+CGMI
+CGMM
+CGMR
+CGSN
20
+CIMI
+CNUM
20
20
+CREG
+COPS
180
+CLCK
180
+CPWD
180
+CLIP
180
+CLIR
180
+CCFC
+CCWA
180
20
+CHLD
20
+CUSD
180
+CAOC
20
+CSSN
20
+CLCC
20
+CPAS
+CPIN
20
+CSQ
+CPBS
+CPBR
20
+CPBF
20
+CPBW
20
+CALM
+CRSL
Page 30 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
+CLVL
+CMUT
+CACM
+CAMM
20
20
+CPUC
20
+CMEE
+VTS
20
+GMI
+GMM
+GMR
+GSN
I3
20
I4
I5
+CSMS
+CPMS
+CMGF
+CSCA
+CSMP
20
+CSDH
+CSAS
+CRES
+CNMI
+CMGS
180 / 5 for prompt">"
+CMSS
+CMGW
180
5 / 5 for prompt">"
+CMGD
+CMGR
+CMGL
#CAP
10
#SRS
10
#SRP
10
#STM
#PCT
10
10
#SHDN
10
#QTEMP
10
#SGPO
10
#GGPI
10
Page 31 of 187
Rev.1
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
#MONI
10
+CGACT
180
+CGATT
+CGDATA
180
20
+CGDCONT
20
+CGPADDR
20
+CGQMIN
20
+CGQREQ
20
Rev.1
2.2.4 Command issuing timing
The chain Command -> Response shall always be respected and a new command must not be
issued before the GM862-PCS has terminated all the sending of its response result code (whatever it
may be).
This applies especially to applications that "sense" the OK text and therefore may send the next
command before the complete code OK 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 and
the issue of the next AT command.
If the response codes are disabled and therefore the module does not report any response to the
command, then at least the 20ms pause time shall be respected.
During command mode, due to hardware limitations, under severe CPU load the serial port can
loose some characters if placed in autobauding at high speeds. Therefore if you encounter this
problem fix the baud rate with AT+IPR command.
2.2.5 Factory Profile and parameters stored in the profile
The GM862-PCS stores several command configurations in the internal non volatile memory (see
command &W), allowing to remember this status even after power off.
The parameters that are stored in the profile and their are:
GSM DATA MODE
AUTOBAUD
: +CBST: 0,0,1
: +IPR: 0
COMMAND ECHO
: E1
RESULT MESSAGES
: Q1
VERBOSE MESSAGES
: V1
EXTENDED MESSAGES
: X1
FLOW CONTROL OPTIONS
: &K3
CTS (C106) OPTIONS
: &B2
DSR (C107) OPTIONS
: &S3
DTR (C108) OPTIONS
: &D0
DCD (C109) OPTIONS
: &C1
RI (C125) OPTIONS
C108/1 OPERATION
: \R1
: &D4
POWER SAVING
: +CFUN: 1
DEFAULT PROFILE
: &Y0
S REGISTERS: S0=0;S1=0;S2=43;S3=13;S4=10;S5=8;S7=60;S12=50;S25=5;S38=20
Page 32 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.3 Command Availability Table
The available command, depending on the module are evidenced in the following table:
GM862-PCS
PRODUCT
GM862-GPRS
GM862-GSM
&F
•
•
•
•
•
•
+FCLASS
•
•
•
&Y
•
•
•
&W
•
•
•
&Z
•
•
•
&N
•
•
•
+GMI
•
•
•
+GMM
•
•
•
+GMR
•
•
•
+GCAP
•
•
•
+GSN
•
•
•
&V
•
•
•
&V0
•
•
•
&V1
•
•
•
&V2
•
•
•
\V
•
•
•
%L
•
•
•
%Q
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
&C
•
•
•
&D
•
•
•
&K
•
•
•
&S
•
•
•
\R
•
•
•
COMMAND
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Tri Band GPRS Data Terminal System
Rev.1
+IPR
•
•
•
+IFC
•
•
•
+ILRR
•
•
•
+ICF
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
&G
•
•
•
&P
•
•
•
+MS
•
•
•
%E
•
•
•
+DS
•
•
•
+DR
•
•
•
\B
•
•
•
\K
•
•
•
S0
•
•
•
S1
•
•
•
S2
•
•
•
S3
•
•
•
S4
•
•
•
S5
•
•
•
S7
•
•
•
S10
•
•
•
S12
•
•
•
S25
•
•
•
S30
•
•
•
S38
•
•
•
+CGMI
•
•
•
+CGMM
•
•
•
+CGMR
•
•
•
ETSI GSM 07.07 AT COMMANDS
Page 34 of 187
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Tri 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
•
•
•
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TECHNICAL MANUAL
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Tri 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 36 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
CUSTOM 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 37 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
+FPR
•
•
•
+FDD
•
•
•
EASY GPRS EXTENSION AT COMMANDS
#USERID
•
•
#PASSW
•
•
#PKTSZ
•
•
#DSTO
•
•
#SKTTO
•
•
#SKTSET
•
•
#SKTOP
•
•
#QDNS
•
•
#SKTSAV
•
•
•
EASY CAMERA EXTENSION AT COMMANDS
#CAMON
•
#SKTRST
#CAMOFF
•
#TPHOTO
•
#RPHOTO
•
#CSQUAL
•
#CSMODE
•
Page 38 of 187
•
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.4 Hayes Compliant AT Commands
2.4.1 Generic Modem Control
2.4.1.1 &F - restore factory configuration
&F – restore factory configuration
Execute command
AT&F
Calls the factory configuration, resetting the default profile.
Read command
Write command
Test command
Example
Reference
V25ter.
SW release
Version A
2.4.1.2 Z - soft reset
Z – soft reset
Execute command
ATZ 
Send a software reset to device, loading on the configuration the specified
default profile.
Parameter:  = 0…1 - profile
Note: Must be the last command on the line.
Read command
Write command
Test command
Example
Reference
V25ter.
SW release
Version A
Page 39 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.4.1.3 +FCLASS - select active service class
+FCLASS - select active service class
Execute command
Read command
AT+FCLASS?
Write command
AT+FCLASS= 
Returns the current configuration value of the parameter .
Set the GM862-PCS in specified connection mode (data, fax, voice), hence
all the calls done after, will be data or voice.
Parameter:
: 0 = data
: 1 = fax class 1
: 8 = voice
Test command
AT+FCLASS=?
Returns all supported values of the parameters .
Example
Reference
GSM 07.07
SW release
Version A
2.4.1.4 &Y - designate a default reset profile
&Y – designate a default reset profile
Execute command
AT&Y 
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 the
default profile to be loaded on startup.
Parameter:  = 0…1 - profile
Note: Differently from ATZ command which simply loads the desired
profile , with the command AT&Y the chosen profile becomes the one
which will be loaded on every startup.
Read command
Write command
Test command
Example
Reference
SW release
Version A
Page 40 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.4.1.5 &W - store current configuration
&W – store current configuration
Execute command
AT&W 
Stores on profile n the complete configuration of the device.
Parameter:  = 0…1 - profile
Read command
Write command
Test command
Example
Reference
SW release
Version A
2.4.1.6 &Z - store telephone number in the Telit GM862-PCS module internal
phonebook
&Z – store telephone number in the GM862-PCS internal phonebook
Execute command
AT&Z  =  The GM862-PCS has a built in non volatile memory in which telephone
numbers of a maximum 24 digits can be stored. The command AT&Z  =
 stores in the record n the telephone number nr. The records cannot be
overwritten, they must be cleared before rewriting.
Parameter:
: phonebook record : telephone number
Note1: To delete the record  the command AT&Z= must be issued.
Note2: The records in the GM862-PCS memory can be viewed with the
command AT&N, while the telephone number stored in the record n can be
dialled by giving the command ATDS=.
Read command
Write command
Test command
Example
Reference
SW release
Version A
Page 41 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.4.1.7 &N - display internal phonebook stored numbers
&N – display internal phonebook stored numbers
Execute command
AT&N 
Returns the telephone number stored in the internal memory at the record
number .
Parameter:  - phonebook record
Note: if parameter  is omitted then all the internal records are shown.
Read command
Write command
Test command
Example
Reference
SW release
Version A
2.4.1.8 +GMI - request manufacturer identification
+GMI – request manufacturer identification
Execute command
AT+GMI
Returns the manufacturer identification.
Read command
Write command
Test command
Example
Reference
V.25ter
SW release
Version A
2.4.1.9 +GMM - request model identification
+GMM – request model identification
Execute command
AT+GMM
Returns the model identification.
Read command
Write command
Test command
Example
Reference
V.25ter
SW release
Version A
Page 42 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.4.1.10
Rev.1
+GMR - request revision identification
+GMR – request revision identification
Execute command
AT+GMR
Returns the software revision identification.
Read command
Write command
Test command
Example
Reference
SW release
2.4.1.11
V.25ter
Version A
+GCAP - request capabilities list
+GCAP – request capabilities list
Execute command
AT+GCAP
Returns the equipment supported command set list.
Read command
Write command
Test command
Example
Reference
SW release
2.4.1.12
V.25ter
Version A
+GSN - request serial number
+GSN – request serial number
Execute command
AT+GSN
Returns the device board serial number.
Note: The number returned is not the IMSI, it is only the board number
Read command
Write command
Test command
Example
Reference
V.25ter
SW release
Version A
Page 43 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.4.1.13
&V - display current configuration & profile
&V – display current configuration & profile
Execute command
AT&V
Returns all the configuration parameters settings.
Read command
Write command
Test command
Example
AT&V
DTE SPEED
DTE FORMAT
CELLULAR PHONE
GSM DATA MODE
AUTOBAUD
COMMAND ECHO
RESULT MESSAGES
VERBOSE MESSAGES
EXTENDED MESSAGES
ECM TYPE MESSAGES
LINE SPEED
CONSTANT DTE SPEED
FLOW CONTROL OPTIONS
ERROR CORRECTION MODE
CTS (C106) OPTIONS
DSR (C107) OPTIONS
DTR (C108) OPTIONS
DCD (C109) OPTIONS
RI (C125) OPTIONS
C108/1 OPERATION
POWER SAVING ON DTR
CALL ABORT
DEFAULT PROFILE
OK
Reference
SW release
: 19200
: 8N1
: GSM TELIT: Operative
: \N4=Not Trasparent
: +IPR0=YES
: E1=YES
: Q0=YES
: V1=YES
: X1=YES
: \V0=NO
: F8=9600
: \J0=YES
: &K3=HW bidirect.
: \N4=RLP
: &B2=OFF while disc.
: &S3=PHONE ready->ON
: &D0=ignored
: &C1=follows carrier
: \R1=OFF dur. off-hk
: &D4=NO
: +CFUN:1=NO
: YES
: &Y0=user profile 1
V25ter
Version A
Page 44 of 187
Rev.1
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.4.1.14
Rev.1
&V0 - display current configuration & profile
&V0 – display current configuration & profile
Execute command
AT&V0
Returns all the configuration parameters settings.
Note: this command is the same as &V, it is included only for
backwards compatibility.
Read command
Write command
Test command
Example
Reference
SW release
2.4.1.15
Version A
&V1 - display S registers values
&V1 – display S registers values
Execute command
AT&V1
Returns the value of the S registers in decimal and hexadecimal value in the
format:
REG DEC HEX
  
where
 - S register number (0 .. 52)
 - current value in decimal notation
 - current value in hexadecimal notation
Read command
Write command
Test command
Example
Reference
SW release
Version A
Page 45 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.4.1.16
&V2 - display last connection statistics
&V2 – display last connection statistics
Execute command
AT&V2
Returns the last connection statistics & connection failure reason.
Read command
Write command
Test command
Example
Reference
SW release
2.4.1.17
Version A
\V - single line connect message
\V – Single line connect message
Execute command
AT\V 
Set single line connect message.
Parameter:
 = 0 - off
 = 1 on
Read command
Write command
Test command
Example
Reference
SW release
Version A
Page 46 of 187
Rev.1
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.4.1.18
%L - report line signal level
%L – report line signal level
Execute command
AT%L
Reports the line signal level.
Note: Since on mobile phone there's no line connection, command is
included only for compatibility and returns only OK.
To check signal strength (level) use the +CSQ command.
Read command
Write command
Test command
Example
Reference
SW release
2.4.1.19
Version A
%Q - report line quality
%Q – report line quality
Execute command
AT%Q
Reports the line quality indicator.
Note: Since on mobile phone there's no line connection, command is
included only for compatibility and returns only OK.
To check signal quality use the +CSQ command.
Read command
Write command
Test command
Example
Reference
SW release
Version A
Page 47 of 187
Rev.1
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.4.2 DTE - modem interface control
2.4.2.1 E - command echo
E – command echo
Execute command
Read command
Write command
ATE 
Controls the command echo response of the device, enabling or disabling the
echo.
Parameter:
 = 0 - disables command echo, hence after this command the only
characters received by DTE are the responses to commands sent to device.
 = 1 - enables command echo (default) , hence command sent to the
device are echoed back to the DTE before the response is given.
Test command
Example
Reference
V25ter
SW release
Version A
2.4.2.2 Q - quiet resut codes
Q – quiet result codes
Execute command
Read command
Write command
ATQ 
Enables or disables the result codes.
Parameter:
 = 0 - enables result codes
 = 1 - disables result codes
Note: After disabling result codes with ATQ1, the device does not return a
response to commands (usually OK), but command are executed anyway.
Test command
Example
Reference
SW release
V25ter
Version A
Page 48 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.4.2.3 V- result code form
V – result code form
Execute command
Read command
Write command
ATV 
Sets the result code format.
Parameter:
 = 0 set the short format (terse) return codes are numbers 0-9.
 = 1 set the long form (verbose) return codes.
Note: Line feed is not issued before a short format result code.
Test command
Example
Reference
V25ter
SW release
Version A
2.4.2.4 X - extended result codes
X – extended result codes
Execute command
Read command
Write command
ATX 
Test command
Note
Reference
SW release
Selects the result code messages subset used by the modem to inform the
DTE of the result of the commands.
Parameter:
 = 0 - send only OK, CONNECT, RING, NO CARRIER, ERROR, NO
ANSWER results. Busy tones reporting is disabled.
 = 1,2,3,4 - reports all messages (default).
For complete control on CONNECT response message see also +DR
command.
V25ter
Version A
Page 49 of 187
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.4.2.5 I - Request identifier and software checksum
I – request identifier and software checksum
Execute command
Read command
Write command
ATI 
Returns the identifier and a software checksum.
Parameter:
 = 0 numerical identifier.
 = 1 GM862-PCS checksum
 = 2 checksum check result
 = 3 manufacturer, software product code
 = 4 product name
 = 5 DOB version
Test command
Example
Reference
V25ter
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Version A
2.4.2.6 &C - data carrier detect (DCD) control
&C – Data carrier detect (DCD) control
Execute command
Read command
Write command
AT&C 
Controls the RS232 DCD output behaviour.
Parameter:
 = 0 DCD remains high always.
 = 1 DCD follows the Carrier detect status: if carrier is detected DCD is
high, otherwise DCD is low. (default)
Test command
Example
Reference
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Tri Band GPRS Data Terminal System
Rev.1
2.4.2.7 &D - data terminal ready (DTR) control
&D – data terminal ready (DTR) control
Execute command
Read command
Write command
AT&D 
Controls the GM862-PCS behaviour to the RS232 DTR transitions.
Parameter:
 = 0 DTR transitions are ignored.
 = 1 when the GM862-PCS is connected, the high to low transition of
DTR pin sets the device in command mode, the current connection is NOT
closed.
 = 2 when the GM862-PCS is connected , the high to low transition of
DTR pin sets the device in command mode and the current connection is
closed.
Note: if AT&D2 command is issued, the device does not answer to incoming
calls if DTR is low, even if ATA command is given.
Test command
Example
Reference
SW release
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Version A
2.4.2.8 &K - flow control
&K – flow control
Execute command
Read command
Write command
AT&K 
Controls the RS232 flow control behaviour.
Parameter.
 = 0 – disabled
 = 1 - only CTS active, Hardware mono-directional
 = 2 - XON/XOFF software mono direction
 = 3 - RTS/CTS active, Hardware bi-directional (default)
 = 4 - XON/XOFF, Software bi-directional with filtering
 = 5 - XON/XOFF, Software bi-directional without filtering (Pass
Through)
 = 6 - RTS/CTS active, Hardware bi-directional & software
XON/XOFF (bi-directional) with filtering
Test command
Example
Reference
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Version A
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.4.2.9 &S - data set ready (DSR) control
&S – data set ready (DSR) control
Execute command
Read command
Write command
AT&S 
Controls the RS232 DSR pin behaviour:
n = 0 - always ON
n = 1 - follows the GSM traffic channel indication.
n = 2 - ON when connected
n = 3 - ON when device is ready to receive commands
Note: if option 1 is selected then DSR is tied up when the device receives
from the network the GSM traffic channel indication.
Test command
Example
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.4.2.10
Rev.1
\R - ring (RI) control
\R – ring (RI) control
Execute command
Read command
Write command
AT\R 
controls the RING output pin behaviour.
Parameter:
 = 0 - RING on during ringing and further connection
 = 1 – RING on during ringing
 = 2 - RING follows the ring signal
Note: to check the ring option status use the &V command.
Test command
Example
Reference
SW release
2.4.2.11
Version A
+IPR - fixed DTE interface rate
+IPR – fixed DTE interface rate
Execute command
Read command
AT+IPR?
Write command
AT+IPR = 
Returns the current value of +IPR parameter.
Specifies the DTE speed at which the device accepts commands
during command mode operation, it may be used to fix the DTEDCE interface speed.
Parameter:
 = 0/300/1200/2400/4800/9600/19200/38400/57600/115200
If  is unspecified or set to 0, then automatic speed detection is enabled
and also character format (see +ICF) is set to auto-detect.
If  is specified and not 0, DTE-DCE speed is fixed at that
speed, hence no speed auto-detection (autobauding) is enabled.
Test command
AT+IPR=?
Returns the supported serial port speed list.
Example
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.4.2.12
Rev.1
+IFC - DTE - DTA flow control
+IFC – DTE-DTA flow control
Execute command
Read command
AT+IFC?
Returns active flow control settings.
Write command
Response
AT+IFC = ,  Selects the flow control behavior of the serial port in both
directions: from DTE to DTA ( option) and from DTA to
DTE ()
Parameter:
 - flow control option for the data received by DTE,
 - flow control option for the data sent by DTA
 = 0 - flow control None
 = 1 - XON/XOFF filtered
 = 2 - C105 (RTS)
 = 3 - XON/XOFF not filtered
 = 0 - flow control None
 = 1 - XON/XOFF
 = 2 - C106 (CTS)
Note: This command is equivalent to &K command.
Test command
Response
AT+IFC=?
Returns all supported values of the parameters  and
.
Example
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.4.2.13
Rev.1
+ILRR - DTE - modem rate reporting
+ILRR – DTE-modem rate reporting
Execute command
Read command
AT+ILRR?
Write command
AT+ILRR = 
Returns active setting of port speed rate reporting information.
Controls whether or not the +ILRR: information text is
transmitted from the GM862-PCS to the DTE.
Parameter:
 = 0 - local port speed rate reporting disabled
 = 1 - local port speed rate reporting enabled
Note: this information if enabled is sent upon connection.
Test command
AT+ILRR=?
Returns all supported values of the parameter 
Example
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.4.2.14
Rev.1
+ICF - DTE - modem character format
+ICF – DTE-modem character format
Execute command
Read command
AT+ICF?
Write command
AT+ICF = [,]
Test command
AT+ICF=?
Example
Reference
SW release
Returns current value of the character format.
Defines the asynchronous character format to be used when
autobauding is disabled.
Parameter:
 = 0..5, < parity> = 0/1
AT+ICF = 0 - auto detect
AT+ICF = 1 - 8N2
AT+ICF = 2,0 - 8O1
AT+ICF = 2,1 - 8E1
AT+ICF = 3 - 8N1
AT+ICF = 5,0 - 7O1
AT+ICF = 5,1 - 7E1
Note: the character format is defined as: number of bit per char,
parity bit and stop bit; where parity can be None, Odd and
Even. E.g. 8E1 means 8 bit per char with the even parity bit
and 1 stop bit.
Returns all supported values of the parameters  and

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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.4.3 Call Control
2.4.3.1 D - dial
D – dial
Execute command
ATD 
Starts a call to the phone number given as parameter.
Parameter:  - phone number to be dialled
Note: The call is a data call or voice call depending on +FCLASS setting. If
AT+FCLASS=8 command was issued before calling then the call will be
done as a voice call, instead if AT+FCLASS=0 command was issued the call
will be a data one. The default value of +FCLASS is 0 hence calls are by
default 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  ;
Issues a VOICE call to the number given regardless of the current value of the
parameter +FCLASS, which remains unaffected.
Parameter:  - phone number to be dialled.
Issues a call (VOICE if ";" modifier is added to the end of the command) to
the number stored in the GM862-PCS internal phonebook position number
.
Parameter:  - internal phonebook position to be called
Issues a call (VOICE if ";" modifier is added to the end of the command) to
the number stored in the SIM phonebook in the record number .
Parameter:  - SIM phonebook position to be called
Issues a call to the last number dialled.
Issues a call to the internally stored number at the position . ( See
commands &N and &Z)
Issues a call [voice if ; is added] overwriting the CLIR setting in order to hide
the CLI to the called party for the current call only.
ATD  [;]
ATD>  [;]
ATDL
ATDS=
ATD I [;]
ATD i [;]
Issues a call [voice if ; is added] overwriting the CLIR setting in order to show
the CLI to the called party for the current call only.
Issues a call [voice if ; is added] checking the CUG supplementary service for
the current call. Refer to +CCUG command.
ATD G[;]
ATDg[;]
ATD*[* This command is specific of GPRS functionality and causes the MT to
perform whatever actions are necessary to establish communication between
]
[*[][*[]]]]#
Parameters:
 - (GPRS Service Code) a digit string (value 99) which identifies
a request to use the GPRS
 - string that identifies the called party in the address space applicable
to the PDP.
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Tri Band GPRS Data Terminal System
Rev.1
D – dial
: a string which indicates the layer 2 protocol to be used (see
+CGDATA command). For communications software that does not support
arbitrary characters in the dial string, the following numeric equivalents shall
be used:
1 - PPP
Other values are reserved and will result in an ERROR response to the set
command.
: a digit string which specifies a particular PDP context definition (see
+CGDCONT command).
Read command
Write command
Test command
Example
Reference
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Tri Band GPRS Data Terminal System
Rev.1
2.4.3.2 T - set tone dial
T – set tone dial
Execute command
ATT
It has no effect is included only for backward compatibility with landline
modems.
Read command
Write command
Test command
Example
Reference
SW release
V25ter.
Version A
2.4.3.3 P - set pulse dial
P – set pulse dial
Execute command
ATP
It has no effect is included only for backward compatibility with landline
modems.
Read command
Write command
Test command
Example
Reference
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Version A
2.4.3.4 A - answer
A – answer
Execute command
ATA
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 be
followed immediately by a  character.
Read command
Write command
Test command
Example
Reference
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Tri Band GPRS Data Terminal System
Rev.1
2.4.3.5 A/ - Last command automatic repetition
A/ – last command automatic repetition
Execute command
A/
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 command
Write command
Test command
Example
Reference
SW release
Version A
2.4.3.6 H - disconnect
H - disconnect
Execute command
ATH
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 mode
commands are not sensed, instead characters are sent to the other
interlocutor. To issue this command you must be in command mode
operation, hence escape sequence (see register S2) may be required before
issuing this command, otherwise if &D1 option is active, DTR pin should be
tied low to return in the command mode.
When a voice call is active, no escape sequence is needed.
Read command
Write command
Test command
Example
Reference
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Tri Band GPRS Data Terminal System
Rev.1
2.4.3.7 O - return to On Line Mode
O – return to on line mode
Execute command
ATO
It is used return to On-line mode from command mode. If there's no
connection active returns ERROR.
Note: After the issue of this command, if the device is in conversation, to
send other commands to the device you must return to command mode by
issuing the escape sequence or lowering DTR if &D1 option is active.
Read command
Write command
Test command
Example
Reference
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Version A
2.4.3.8 &G - guard tone
&G – guard tone
Execute command
AT&G
It is has no effect is included only for backward compatibility with landline
modems.
Read command
Write command
Test command
Example
Reference
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Tri Band GPRS Data Terminal System
Rev.1
2.4.3.9 &P - pulse dial make/break ratio
&P – pulse dial make/break ratio
Execute command
AT&P
It is has no effect is included only for backward compatibility with landline
modems..
Read command
Write command
Test command
Example
Reference
SW release
Version A
2.4.4 Modulation control
2.4.4.1 +MS - modulation control
+MS – modulation control
Execute command
Read command
Write command
AT+MS = , , This command has no effect is included only for
, 
backward compatibility with landline modems.
Parameter:
 =V21 / V22 / V22B / V23C / V32 / V34
 = 0/1
 = 0
 = 300-14400
Note: to change modulation requested use +CBST
command.
Test command
Example
Reference
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Tri Band GPRS Data Terminal System
Rev.1
2.4.4.2 %E - enable/disable line quality monitor and auto retrain or fallback /
fallforward
%E – enable/disable line quality monitor and auto retrain or fallback/fallforward
Execute command
AT%E
It has no effect is included only for backward
compatibility with landline modems.
Read command
Write command
Test command
Example
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.4.5 Compression control
2.4.5.1 +DS - set data compression
+DS – set data compression
Execute command
Read command
AT+DS?
Write command
AT+DS = 
Test command
AT+DS=?
Example
Reference
SW release
Returns current value of the data compression parameter.
Sets the V42 compression parameter.
Parameter:
 = 0 - no compression
 = 1 - compression enabled
Note: The only value supported is 0 - no compression
Returns all supported values of the parameter n
V25ter
Version A
2.4.5.2 +DR - data compression reporting
+DR – data compression reporting
Execute command
Read command
Write command
AT+DR = 
Controls the data compression reporting upon connection.
Parameter:
 = 0 no data compression reporting is displayed at the connection
 = 1 a data compression report message is sent by the device upon
connection
Test command
Example
Reference
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.4.6Break control
2.4.6.1 \B - transmit break to remote
\B – transmit break to remote
Execute command
Read command
Write command
AT\B
It has no effect is included only for backward compatibility with
landline modems
Test command
Example
Reference
SW release
Version A
2.4.6.2 \K - break handling
\K – break handling
Execute command
Read command
Write command
AT\K
Response
It has no effect is included only for backward compatibility with
landline modems
 = 1.. 5
Test command
Example
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.4.7 S parameters
2.4.7.1 S0 - number of rings to auto answer
S0 – number of rings to auto answer
Execute command
Read command
ATS0?
Write command
ATS0 = 
Returns the current value of S0 parameter.
Sets the number of rings required before device automatically
answers an incoming call.
Parameter:
 = 0-255
 = 0 auto answer disabled
Test command
Example
Reference
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2.4.7.2 S1 - ring counter
S1 – ring counter
Execute command
Read command
ATS1?
S1 is incremented each time the device detects the ring signal of
an incoming call. S1is cleared if no ring occur over an eight
seconds interval.
This command returns the value of this parameter.
Write command
Test command
Example
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.4.7.3 S2 - escape character
S2 – escape character
Execute command
Read command
Write command
ATS2 = 
S2 holds the decimal value of the ASCII character used as escape
character. This command sets this character equal to .
Parameter:  - escape character 0-255
Note: The escape sequence consists of three escape characters
preceded by n ms of idle and followed by m ms of idle.
Test command
Example
Reference
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Version A
2.4.7.4 S3 - carriage return character
S3 – carriage return character
Execute command
Read command
Write command
ATS3 = 
Sets the command line and result code terminator character in
decimal ASCII.
Parameter:  - carriage return character 0-127
Note: Default 13 (Carriage Return)
Test command
Example
Reference
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Tri Band GPRS Data Terminal System
Rev.1
2.4.7.5 S4 - line feed character
S4 – line feed character
Execute command
Read command
Write command
ATS4 = 
Sets the character recognized as line feed character.
Parameter:  - line feed character 0-127
Note: Default 10 (Line Feed). The line feed character is output
after carriage return character if verbose result codes are used
( V1 option used ).
Test command
Example
Reference
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2.4.7.6 S5 - backspace character
S5 – backspace character
Execute command
Read command
Write command
ATS5 = 
Sets the decimal ASCII character that is recognized as backspace
character.
Parameter:  - backspace character 1-127
Note: Default 8 ( backspace )
Test command
Example
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.4.7.7 S7 - wait time for carrier, silence or dial tone
S7 – wait time for carrier, silence or dial tone
Execute command
Read command
Write command
ATS7 = 
S7 sets the length of time in seconds that the device will wait for
carrier before hanging up the call. The timer is started when the
device finishes dialing (originate), or 2 seconds after going offhook.
Parameter:  - 1-255
Note: Default is 60 seconds
Test command
Example
Reference
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2.4.7.8 S10 - lost carrier to hang up delay
S10 – lost carrier to hang up delay
Execute command
Read command
Write command
ATS10 = 
S10 defines the maximum time allowed to a carrier loss before
disconnecting.
Parameter:  - tenth of seconds 1-255
Note: default is 50 (5 seconds).
Test command
Example
Reference
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Tri Band GPRS Data Terminal System
Rev.1
2.4.7.9 S12 - escape prompt delay
S12 – escape prompt delay
Execute command
Read command
Write command
ATS12 = 
Defines the guard time of silence before and after the escape
sequence in order to accept it as a valid one.
Parameter:  - 20-255 fiftieth of seconds
Note: default is 50 (1 second )
Test command
Example
Reference
SW release
2.4.7.10
Version A
S25 - delay to DTR off
S25 –delay to DTR off
Execute command
Read command
Write command
ATS25 = 
Defines how long the DTR must be off to consider the high to
low transition as a valid one.
Parameter:  - 1-255 hundredth of seconds
Note: default is 5 ( 5 hundredth of second)
Test command
Example
Reference
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Tri Band GPRS Data Terminal System
2.4.7.11
Rev.1
S30 - disconnect inactivity timer
S30 –disconnect inactivity timer
Execute command
Read command
Write command
ATS30 = 
Defines the inactivity timeout timer value in minutes. The Device
disconnects if no characters are exchanged for a time period of at
least S30 minutes.
Parameter:
 - 0-127 minutes
 = 0 - means inactivity timer disabled, hence no
disconnect on inactivity feature is enabled.
Note: Default is 0
Test command
Example
Reference
SW release
2.4.7.12
Version A
S38 - delay before forced hang up
S38 –delay before forced hang up
Execute command
Read command
Write command
ATS38 = 
Defines the time in seconds that the device waits after a hang up
command for transmit buffer to be emptied. 255 value means that
disconnecting is done only after complete buffer upload.
Parameter:  - 0-255 s
Note: Default is 20 s
Test command
Example
Reference
SW release
Version A
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.5 ETSI GSM 07.07 AT Commands
2.5.1General
2.5.1.1 +CGMI - request manufacturer identification
+CGMI – request manufacturer identification
Execute command
AT+CGMI
Returns the device manufacturer identification code.
Read command
Write command
Test command
Example
Reference
SW release
GSM 07.07
Version A
2.5.1.2 +CGMM - request model identification
+CGMM – request model identification
Execute command
AT+CGMM
Returns the device model identification code.
Read command
Write command
Test command
Example
Reference
SW release
GSM 07.07
Version A
2.5.1.3 +CGMR - request revision identification
+CGMR – request revision identification
Execute command
AT+CGMR
Returns device software revision number.
Read command
Write command
Test command
Example
Reference
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.5.1.4 +CGSN - request product serial number identification
+CGSN – request product serial number identification
Execute command
AT+CGSN
Returns the product serial number, identified as the IMEI of the
mobile.
Read command
Write command
Test command
Example
Reference
SW release
GSM 07.07
Version A
2.5.1.5 +CSCS - select TE character set
+CSCS – select TE character set
Execute command
Read command
AT+CSCS?
Write command
AT+CSCS 
Test command
AT+CSCS=?
Returns the current value of the active character set.
Sets the current character set used by the device.
Parameter:  = "IRA" - char set
Note: The only character set supported yet is the
ITU–T.50 ( IRA)
Returns the supported values of the parameter chset. Yet only
IRA is supported.
Example
Reference
GSM 07.07
SW release
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Tri Band GPRS Data Terminal System
Rev.1
2.5.1.6 +CIMI - request international mobile subscriber identity (IMSI)
+CIMI – request international mobile subscriber identify (IMSI)
Execute command
AT+CIMI
Returns the value of the Internal Mobile Subscriber Identity
stored in the SIM.
Note: A SIM card must be present in the SIM card housing, else
the command returns ERROR.
Read command
Write command
Test command
Example
Reference
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GSM 07.07
Version A
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Tri Band GPRS Data Terminal System
Rev.1
2.5.2 Call control
2.5.2.1 +CBST - select bearer service type
+CBST – select bearer service type
Execute command
Read command
AT+CBST?
Write command
AT+CBST = ,
, 
Test command
AT+CBST=?
Example
Reference
SW release
Returns current value of the parameters , and 
Selects the bearer service  with data rate , and the
connection element  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 since
they depend on the purpose of the device and data services provided by
it. Not all combinations of these subparameters are supported. The
supported values are:

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)

0 - data circuit asynchronous

0 – transparent
1 - non transparent
Default is +CBST = 7,0,1
Returns the supported range of values of the parameters.
GSM 07.07
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Tri Band GPRS Data Terminal System
Rev.1
2.5.2.2 +CRLP - radio link protocol
+CRLP – radio link protocol
Execute command
Read command
AT+CRLP?
Write command
AT+CRLP = ,
, , ,

Test command
AT+CRLP=?
Example
Reference
SW release
Returns the current value of the RLP protocol parameters.
Radio link protocol (RLP) parameters used when non-transparent data
calls are originated may be altered with this command.
Parameters:
 = 1...61 - IWF window Dimension
 = 1...61 - MS window Dimension
 = 39…255 – acknowledge timer (10 ms units).
 = 1…255 – retransmission attempts
 = 0 - protocol Version
The default values are: 61,61,78,6,0
Returns supported range of values of the RLP protocol parameters.
GSM 07.07
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Rev.1
2.5.2.3 +CR - service reporting control
+CR – service reporting control
Execute command
Read command
AT+CR?
Write command
AT+CR = 
Returns current intermediate report setting
Controls whether or not intermediate result code +CR:  is returned
from the TA to the TE. If enabled, the intermediate result code is
transmitted at the point during connect negotiation at which the TA has
determined which speed and quality of service will be used, before any
error control or data compression reports are transmitted, and before the
intermediate result code CONNECT is transmitted.
Parameter: 
 = 0 - disables intermediate result code report
 = 1 - enables intermediate result code report
This command replaces V.25ter [14] command Modulation Reporting
Control +MR, which is not appropriate for use with a GSM terminal.
The result code parameter  has the meaning:
ASYNC - asynchronous transparent
SYNC - synchronous transparent
REL ASYNC - asynchronous non-transparent
REL SYNC - synchronous non-transparent.
Test command
AT+CR=?
Returns the supported range of values of the parameter .
Example
Reference
GSM 07.07
SW release
Version A
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Tri Band GPRS Data Terminal System
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2.5.2.4 +CEER - extended error report
+CEER – extended error report
Execute command
AT+CEER
Reports a information text regarding some error condition that may
occur:
- the failure in the last unsuccessful call setup (originating or answering)
- the last call release
- the last unsuccessful GPRS attach or unsuccessful PDP context
activation,
- the last GPRS detach or PDP context deactivation.
Note: if none of this condition has occurred since power up then No
Error condition is reported
Read command
Write command
Test command
Example
Reference
GSM 07.07
SW release
Version A
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Rev.1
2.5.2.5 +CRC - cellular result codes
+CRC – cellular result codes
Execute command
Read command
AT+CRC?
Write command
AT+CRC = 
Test command
AT+CRC=?
Example
Reference
SW release
Returns current value of the parameter .
Controls whether or not the extended format of incoming call indication
is used. When enabled, an incoming call is indicated to the TE with
unsolicited result code +CRING: instead of the normal RING.
Parameter:
 = 0 - disables extended format reporting
 = 1 - enables extended format reporting
Note: On +CRING indication  parameter is the call 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)
Returns supported values of the parameter .
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Tri Band GPRS Data Terminal System
Rev.1
2.5.3Network service handling
2.5.3.1 +CNUM - subscriber number
+CNUM – subscriber number
Execute command
AT+CNUM
Returns the subscriber number i.e. the phone number of the device that is
stored in the SIM card.
Note: the returned number format is:
+CNUM: [] ,  , 
 - optional alphanumeric string associated to 
 - string containing the phone number in the format 
 - type of number:
 = 145 - international numbering scheme (contains the
character "+")
 = 129 - national numbering scheme
Read command
Write command
Test command
Example
Reference
SW release
GSM 07.07
Version A
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Tri Band GPRS Data Terminal System
Rev.1
2.5.3.2 +CREG - network registration report
+CREG – network registration report
Execute command
Read command
Write command
AT+CREG = 
Test command
AT+CREG?
Enables/disables network registration reports depending on the parameter
mode.
Parameter:

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 data
If mode=1, network registration result code reports:
+CREG: 
 = 0 - not registered, ME is not currently searching a new
operator to register to
 = 1 – registered, home network
 = 2 - not registered, but ME is currently searching a new
operator to register to
 = 3 - registration denied
 = 4 -unknown
 = 5 - registered, roaming
If mode=2, network registration result code reports:
+CREG: [,,]
where:
 is the Local Area Code for the currently registered on cell
 is the Cell Id for the currently registered on cell
Note:  and  are reported only if mode=2 and the mobile is
registered on some network cell.
Reports the  and  parameter values in the format:
+CREG: ,[,,]
Note:  and  are reported only if mode=2 and the mobile is
registered on some network cell.
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+CREG – network registration report
Example
AT
OK
at+creg?
+CREG: 0,2
(the GM862-GPRS is in network searching state)
OK
at+creg?
+CREG: 0,2
OK
at+creg?
+CREG: 0,2
OK
at+creg?
+CREG: 0,2
OK
at+creg?
+CREG: 0,1
(the GM862-GPRS is registered )
OK
at+creg?
+CREG: 0,1
Reference
SW release
OK
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Tri Band GPRS Data Terminal System
Rev.1
2.5.3.3 +COPS - operator selection
+COPS – operator selection
Execute command
Read command
AT+COPS?
Write command
AT+COPS =
[[,[,
]]]
Test command
AT+COPS=?
Returns current value of , and 
Forces an attempt to register the GSM network operator, 
parameter defines whether the operator selection is done
automatically or it is forced with  parameter.
Parameters:
 = 0 - automatic choice (the parameter  will be
ignored)
 = 1 - manual choice
 = 3 - set only  parameter (the parameter 
will be ignored)
 = 0 - alphanumeric max length 16 digits
 = 1 – alphanumeric short form
 = 2 - Numeric 5 digits [country code (3) + network code
(2)]
: network operator in the  parameter defined
format.
Note: if manual choice selection operator is not available no other
operators will be chosen for registration.
Returns the list of network operators in the format:
+COPS: (  ,,””, )
where the new parameter stat defines the status of the operator:
 = 0 – unknown
 = 1 – available
 = 2 – current
 = 3 – forbidden
Note: since with this command a network scan is done, this
command may require some seconds before the output is given.
Example
Reference
SW release
GSM 07.07
Version A
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Tri Band GPRS Data Terminal System
Rev.1
2.5.3.4 +CLCK - facility lock/ unlock
+CLCK – facility lock/unlock
Execute command
AT+CLCK =
,
[,
[,]]
Read command
AT+CLCK=,2
It is used to lock or unlock a ME o a network facility.
Parameters: :
"SC" - SIM (PIN request) (device asks SIM password at power-up and
when 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 Home
Country)
"AI" - BAIC (Barr All Incoming Calls)
"IR" - BIC-Roam (Barr Incoming Calls when Roaming outside the
home country)
"AB" - All Barring services (applicable only for =0)
"AG" - All outGoing barring services (applicable only for =0)
"AC" - All inComing barring services (applicable only for =0)
"FD" - SIM fixed dialling memory feature (if PIN2 authentication has
not been done during the current session, PIN2 is required as
)
"PN" - network Personalisation
"PU" - network subset Personalisation
: defines the operation to be done on the facility
 = 0 - unlock facility
 = 1 - lock facility
 = 2 - query status ( see below )
: shall be the same as password specified for the facility
from the DTE user interface or with command Change Password
+CPWD
: represents the class of information of the facility ( sum of bits
 = 1- voice (telephony)
 = 2 - data (refers to all bearer services)
 = 4 - fax (facsimile services) ()
query the status of the facility ; returns
+CLCK:
where  defines the current status of the
facility:
0 - not active ( locked )
1 - active
( unlocked )
Note: For some facility the status is requested to the network, hence if
no network is available the command returns the ERROR message.
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+CLCK – facility lock/unlock
Write command
Test command
AT+CLCK=?
Example
Reference
SW release
Reports all the facility supported by the device.
GSM 07.07
Version A
2.5.3.5 +CPWD - change facility password
+CPWD – change facility password
Execute command
AT+CPWD = ,
Changes the password for the facility lock function of the facility fac.
, 
Parameter: , , 
Note: parameter  is the old password while  is the
new one.
Read command
Write command
Test command
Example
Reference
SW release
GSM 07.07
Version A
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Rev.1
2.5.3.6 +CLIP - calling line identification presentation
+CLIP – calling line identification presentation
Execute command
Read command
AT+CLIP?
Write command
AT+CLIP = 
Returns the status of the supplementary service CLI in the format:
+CLIP: , 
where:
 = 0 - CLI presentation disabled
 = 1 - CLI presentation enabled
: status if the CLIP service on the GSM network
 = 0 - CLIP not provisioned
 = 1 - CLIP provisioned
 = 2 - unknown (e.g. no network is present )
Note: This command issues a status request to the network, hence it
may take a few seconds to give the answer due to the time needed to
exchange data with it.
Enables or disables the calling line identification supplementary
service presentation depending on the value of the parameter .
Parameters: 
 = 0 - disables CLI indication
 = 1 - enables CLI indication
If enabled the device reports after each RING the response:
+CLIP:,
where:
: calling line number
 - type of number:
 = 145 - international numbering scheme (contains the character
"+")
 = 129 - national numbering scheme
Note: The command changes only the report behaviour of the device,
it does not change CLI supplementary service setting on the network.
Test command
AT+CLIP=?
Example
Reference
SW release
Returns the supported values of the parameter 
GSM 07.07
Version A
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Rev.1
2.5.3.7 +CLIR - calling line identification restriction
+CLIR – calling line identification restriction
Execute command
Read command
AT+CLIR?
Write command
AT+CLIR =
,
Reports the network & the device CLIR setting in the format:
+CLIR:,
where
 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)
 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 allowed
Refers to CLIR – service that allows a calling subscriber to enable or disable
the presentation of the CLI to the called party when originating a call
according to the parameters  and  given
Parameters: , 
 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)
 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 allowed
Note: This command set the default behaviour of the device in outgoing calls
and of the network. The two settings should not be conflicting.
Test command
AT+CLIR=?
Reports the supported values of the parameter .
Example
Reference
SW release
GSM 07.07
Version A
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Tri Band GPRS Data Terminal System
Rev.1
2.5.3.8 +CCFC - call forwarding number and conditions
+CCFC – call forwarding number and condition
Execute command
AT+CCFC =
,
[,[,[,][,,,]
]]
Controls the call forwarding supplementary service. Registration,
erasure, activation, deactivation, and status query are supported.
Parameters:
 = 0 – unconditional
 = 1 - mobile busy
 = 2 - no reply
 = 3 - not reachable
 = 4 - all calls (not with query command)
 = 5 - all conditional calls (not with query command)
 = 0 – disable
 = 1 - enable
 = 2 - query status (see below for further explanations)
 = 3 – registration
 = 4 – erasure
: phone number of forwarding address in format specified by
 parameter
: type of address byte in integer format :
145 - international numbering scheme (contains the character "+")
129 - national numbering scheme
: is a sum of integers each representing a class of information
which the command refers; default 7 ( voice + data + fax )
 = 1 - voice (telephony)
 = 2 - data
 = 4 - fax (facsimile services, from SW release C)
: is the time in seconds after which the call is diverted if "no
reply" reason is chosen. Valid only for "no reply" reason.
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+CCFC – call forwarding number and condition
Read command
AT+CCFC =
Queries the network for forwarding service settings on a specific
,2,[number>[, reason. The result is in the form:
[,dopo
+CCFC:,[,[,[,dopo s]]]
s]]]
where:
 = 0 - service not active
 = 1 - service active (calls will be forwarded)
: - 1...30 when "no reply" option for reason is enabled or
queried, 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 (=2) the
response line for 'not active' case (=0) should be returned only if
service is not active for any .
Write command
Test command
AT+CCFC=?
Example
Reference
SW release
Reports supported values for the parameter .
GSM 07.07
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Tri Band GPRS Data Terminal System
Rev.1
2.5.3.9 +CCWA - call waiting
+CCWA – call waiting
Execute command
AT+CCWA =
[[,[,]]]
Controls the call waiting indication supplementary service.
Activation, deactivation, and status query are supported.
Parameters:
: enables/disables call waiting indication reporting:
 = 0 – disable
 = 1 - enable
 enables/disables or queries the service at network level:
 = 0 - disable
 = 1 – enable
 = 2 - query status
: is a sum of integers each representing a class of information
which the command refers; default 7 ( voice + data + fax )
 = 1 - voice (telephony)
 = 2 - data
 = 4 - fax (facsimile services)
The response to the query command is in the form:
+CCWA=,
Where
 represents the status of the service:
 = 0 - inactive
 = 1 - active
 is the class of calls the service status refers to.
Note: if parameter  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 the
device by network but this last one does not report it to the DTE;
instead in the second case the call waiting indication is not generated
by the network. Hence the device results busy to the third party in the
2nd case while in the 1st case a ringing indication is sent to the third
party.
Note4: The command AT+CCWA=1,0 is a non sense and must not be
issued.
Read command
AT+CCWA?
Write command
Reports the current value of the parameter .
Test command
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+CCWA – call waiting
AT+CCWA=?
Example
Reports the supported values for the parameter .
Reference
SW release
GSM 07.07
Version A
2.5.3.10
+CHLD - call holding services
+CHLD – call holding services
Execute command
AT+CHLD = 
Controls the network call hold service. With this service it is possible
to disconnect temporarily a call and keep it suspended while it is
retained by the network, contemporary it is possible to connect
another party or make a multiparty connection.
The action of the command depends on the value of the parameter
Parameter:
 = 0 Releases all pending calls
 = 1 Releases all active calls (if present), and accepts or
reconnects the pending or waiting call
 = 2 Suspends (into pending status) the active call and accepts
or reconnects the waiting or pending call.
 = 3 NOT SUPPORTED
Note: ONLY for VOICE calls
Read command
Write command
Test command
Example
Reference
SW release
GSM 07.07
Version A
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Tri Band GPRS Data Terminal System
2.5.3.11
Rev.1
+CUSD - unstructured supplementary service data
+CUSD – unstructured supplementary service data
Execute command
AT+CUSD = ,[] Enables /disables the unstructured service data reporting.
Parameters:
: is used to disable/enable the presentation of an unsolicited result
code: +CUSD: [,,] to the TE.
:
 = 0 - disable the result code presentation in the DTA
 = 1 - enable the result code presentation in the DTA
 indicates which alphabet is used (Data Coding Scheme),refer to
command Select TE Character Set +CSCS
 - USSD-string (when  parameter is not given, network is
not interrogated):
- if TE character set other than "HEX": ME/TA converts GSM
alphabet into current TE character set according to rules of GSM
07.05
- if TE character set is "HEX": ME/TA converts each 7-bit character
of GSM alphabet into two IRA character long hexadecimal number
(e.g. character ? (GSM 23) is presented as 17 (IRA 49 and 55))
-if indicates that 8-bit data coding scheme is used: ME/TA
converts each 8-bit octet into two IRA character long hexadecimal
number (e.g. octet with integer value 42 is presented to TE as two
characters 2A (IRA 50 and 65))
:
 = 0 - no further user action required, hence network initiated
USSD-Notify, or no further information needed after mobile initiated
operation.
 = 1 - further user action required, hence network initiated
USSD-Request, or further information needed after mobile initiated
operation
 = 2 - USSD terminated by the network
 = 3 - other local client has responded
 = 4 - operation not supported
 = 5 - network time out
Note: only mobile initiated operations are supported.
Warning: In case of successful mobile initiated operation, DTA waits
the USSD response from the network and sends it to the DTE before
the final result code. This will block the AT command interface for
the period of the operation.
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+CUSD – unstructured supplementary service data
Read command
AT+CUSD?
Write command
Test command
AT+CUSD=?
Reports the current value of the parameter 
Reports the supported values for the parameter :
 = 0 - result code presentation in the TA disabled
 = 1 - result code presentation in the TA enabled
Example
Reference
GSM 07.07
SW release
Version A
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.5.3.12
Rev.1
+CAOC - advice of charge
+CAOC – advice of charge
Execute command
AT+CAOC = 
Controls the advise of charge service; the command also includes the
possibility to enable an unsolicited event reporting of the CCM
information.
If unsolicited reporting is enabled DTE sends the result code
+CCCM: 
when the CCM value changes, but not more than every 10 seconds.
 - accumulated call meter value hexadecimal representation (3
byte)
Parameter:
 = 0 - ACM (Accumulated Call Meter) read request
 = 1 - disables unsolicited ACM reporting
 = 2 - enables unsolicited ACM reporting
Note: +CAOC command uses the ACM of the device internal
memory, not the ACM stored in the SIM. The difference is that the
internal memory ACM is reset at power up, while the SIM ACM is
reset 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 command
AT+CAOC?
Write command
Reports the value of ACM in the format: +CAOC: xxxxxx.
Test command
AT+CAOC=?
Reports the supported values for  parameter.
Example
Reference
GSM 07.07
SW release
Version A
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Tri Band GPRS Data Terminal System
2.5.3.13
Rev.1
+CLCC - list current calls
+CLCC – list current calls
Execute command
AT+CLCC
Reports the list of current calls active and their characteristics by
sending the report
+CLCC:,,,,[,,]
for each active call,
where:
 - call identification number
 - call direction
0 - mobile originated call
1 - mobile terminated call
 - state of the call
0 - active
1 - held
2 - dialing (MO call)
3 - alerting (MO call)
4 - incoming (MT call)
5 - waiting (MT call)
 - call type
0 – voice
1 – data
2 – fax
9 - unknown
 - multiparty call flag
0 - call is not one of multiparty (conference) call parties
1 - NOT SUPPORTED
: phone number in format specified by 
: type of phone number byte in integer format
145 - international numbering scheme (contains the character "+")
129 - national numbering scheme
Note: If no call is active then only OK message is sent. This command
is useful in conjunction with command +CHLD to know the various
call status for call holding.
Read command
Write command
Test command
Example
Reference
SW release
GSM 07.07
Version A
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Tri Band GPRS Data Terminal System
2.5.3.14
Rev.1
+CSSN – SS Notification
+CSSN – SS notification
Execute command
Read command
Write command
AT+CSSN = , 
Enable/disable the supplementary service related network initiated
notifications, during the origin of outgoing calls (+CSSI) and
incoming calls (+CSSU)
Parameters:
: sets the +CSSI result code presentation status
0 disable
1 enable
: sets the +CSSU result code presentation status
0 disable
1 enable
Test command
Example
Reference
SW release
GSM 07.07
Version A
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5.4.3.15
Rev.1
+CCUG – Closed User Group supplementary service control
+CCUG – Closed User Group supplementary service control
Execute command
Read command
AT+CCUG?
Write command
AT+CCUG=[,
[,]]
Test command
AT+CCUG=?
Reports the current value of the parameters in the format:
+CCUG: ,,
Enable/disable the CUG supplementary service
Parameters:

0 - disables the temporary CUG settings for all the successive calls
1 - enables the temporary CUG settings for all the successive calls

0...9 - CUG index
10 - no index (preferential CUG taken from subscriber data)

0 - no information
1 - suppress Outgoing Access (OA)
2 - suppress preferential CUG
3 - suppress OA and preferential CUG
Reports the supported range of values for the parameters
,, 
Example
Reference
SW release
GSM 07.07
Version A
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Rev.1
2.5.4 Mobile Equipment control
2.5.4.1 +CPAS - phone activity status
+CPAS – phone activity status
Execute command
reports the device status in the form
AT+CPAS
+CPAS: 
where
 - 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 the
ringer is active)
4 - call in progress (Device is ready for commands from TA/TE,
but a call is in progress)
Read command
same as Execute command.
AT+CPAS?
Write command
Test command
AT+CPAS=?
Example
Reports the supported range of values of .
ATD03282131321;
OK
AT+CPAS?
+CPAS: 3
(the called phone is ringing)
OK
AT+CPAS?
+CPAS: 3
OK
AT+CPAS?
+CPAS: 4
Reference
SW release
(the called phone has answered to your call)
OK
ATH
OK
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Rev.1
2.5.4.2 +CFUN Set phone functionality (Power Saving Management)
+CFUN – power saving management
Execute command
Read command
AT+CFUN?
Write command
AT+CFUN=
reports the power saving status in the form:
+CFUN: 
where
 - power saving status
1 - power saving disabled
5 - power saving enabled
Note: The phone functionality remains always FULL.
Enables/disables the power saving function.
If enabled it reduces the power consumption during the idle time, thus
allowing a longer standby time with a given battery capacity.
Parameters:
: is the power saving function mode
1 - Mobile full functionality with power saving disabled (default)
5 - Mobile full functionality with power saving enabled
Note: To place the telephone in power saving mode, other than to set
the  parameter at value = 5, the line DTR (RS232) must be set to
OFF. Once in power saving, the CTS line switch to the OFF status to
signal that the telephone is really in power saving condition.
During the power saving condition, before sending any AT command
on the serial line, the DTR must be enabled and it must be waited for
the CTS (RS232) line to go in ON status.
Until the DTR line is ON, the telephone will not return back in the
power saving condition.
Note2: The power saving function does not affect the network behavior
of the GM862-GPRS, even during the power save condition the
module remains registered on the network and reachable for incoming
calls or SMS. If a call incomes during the power save, then the module
will wake up and proceed normally with the unsolicited incoming call
code
Test command
Example
Reference
GSM 07.07
SW release
Version A
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Rev.1
2.5.4.3 +CPIN - enter PIN
+CPIN – enter PIN
Execute command
Read command
AT+CPIN?
Reports the PIN/PUK/PUK2 request status of the device in the form:
+CPIN:
where  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 
is returned only when the last executed command resulted in PIN2
authentication failure (i.e. +CME ERROR: 17)
SIM PUK2 - device is waiting SIM PUK2 to be given; this
 is returned only when the last executed command resulted in
PUK2 authentication failure (i.e. +CME ERROR: 18)
PH-NET PIN - device is waiting network personalization
password to be given
PH-NETSUB PIN - device is waiting network subset
personalization password to be given
Note: Pin pending status at startup depends on PIN facility setting, to
change or query the default power up setting use the
AT+CLCK=SC,,  command.
Write command
AT+CPIN =
[,]
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  is
required. This second pin, ,will replace the old pin in the
SIM.
The command may be used to change the SIM PIN by sending it with
both parameters  and  when if PIN request is pending;
if no PIN request is pending the command will return an error code and
to change the PIN the command +CPWD must be used instead.
Parameters: , 
Note: the only commands which are accepted when device is pending
SIM 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
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Tri Band GPRS Data Terminal System
Rev.1
+CPIN – enter PIN
Example
Reference
SW release
AT+CMEE=1
OK
AT+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)
OK
GSM 07.07
Version A
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Tri Band GPRS Data Terminal System
Rev.1
2.5.4.4 +CSQ- signal quality
+CSQ – signal quality
Execute command
AT+CSQ
Reports received signal quality indicators in the form
+CSQ:,
where
 - 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
 - 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 detectable
Note: this command should be used instead of the AT%Q and AT%L
commands, since GSM relevant parameters are the radio link ones and
no line is present, hence %Q %L and have no meaning.
Read command
Write command
Test command
AT+CSQ=?
Returns the supported range of values of the parameters and
.
Example
Reference
SW release
GSM 07.07
Version A
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Tri Band GPRS Data Terminal System
Rev.1
2.5.4.5 +CPBS - select phonebook memory storage
+CPBS – select phonebook memory storage
Execute command
Read command
Write command
AT+CPBS = 
Selects phonebook memory storage , which will be used by
other phonebook commands.
Parameter: 
"SM" - SIM phonebook
"FD" - SIM fixed dialling-phonebook (only phase 2/2+ SIM)
"LD" - SIM last-dialling-phonebook (+CPBW and +CPBF are not
applicable for this storage)
"MC" - device missed (unanswered received) calls list (+CPBW
and +CPBF are not applicable for this storage)
"RC" - ME received calls list (+CPBW and +CPBF are not
applicable for this storage)
Test command
Example
Reference
SW release
GSM 07.07
Version A
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Tri Band GPRS Data Terminal System
Rev.1
2.5.4.6 +CPBR - read phonebook entries
+CPBR – read phonebook entries
Execute command
Read command
Write command
AT+CPBR =
[,]
Test command
AT+CPBR=?
Example
Reference
SW release
returns phonebook entries in locations number from  to
 from the current phonebook memory storage selected with
+CPBS. If is omitted, only location  is returned.
Parameters: , 
The response format is:
+CPBR: ,,,
where
 - the current position number of the PB index (to see the
range of values use +CPBR=?)
 - the phone number stored in the format 
 - type of phone number byte in integer format
145 - international numbering scheme (contains the character "+")
129 - national numbering scheme
 - the alphanumeric text associated to the number (e.g. name
of address)
Note: If all queried locations are empty (but available), no information
text lines will be returned, while if listing fails in an ME error, +CME
ERROR:  is returned.
Returns the supported range of values of the parameters in the form
+CPBR: ( - ),,
where
 - the minimum index number
- the maximum index number
 - maximum number field length
 - maximum name field length
Note: remember to select the PB storage with +CPBS command
before issuing PB commands.
GSM 07.07
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Tri Band GPRS Data Terminal System
Rev.1
2.5.4.7 +CPBF - find phonebook entries
+CPBF – find phonebook entries
Execute command
Read command
Write command
AT+CPBF = 
Test command
AT+CPBF=?
Issues a search for the phonebook records that have the text sub-string
at the start of the name field and returns a report in the form
+CPBF: ,,,
where index, number, type and name have the same meaning than in
the command +CPBR report.
If no PB records satisfy the search criteria then an ERROR message is
reported.
Parameter: 
Note: text is NOT case sensitive and may or not be included in double
brackets.
Reports the maximum lengths of fields  and
 in the PB entry in the form:
+CPBF: ,
Example
Reference
GSM 07.07
SW release
Version A
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Tri Band GPRS Data Terminal System
Rev.1
2.5.4.8 +CPBW - write phonebook entry
+CPBW – write phonebook entry
Execute command
Read command
Write command
AT+CPBW =
[][,[,
[,]]]
Stores at the position  a Phonebook record defined by
, and  parameters
Parameters: , , , 
 - the phone number in the format 
 - the type of number
145 - international numbering scheme (contains the character "+")
129 - national numbering scheme
 - the text associated to the number.
Note: If record number  already exists, it will be overwritten.
If only  is given, the record number  is deleted.
If  is omitted, the number  is stored in the first free
phonebook location.
Text in the  field and number in the  field may or
may not be included in double brackets.
Test command
AT+CPBW=?
Reports the maximum lengths of fields  and  in the
PB entry in the form:
+CPBW: ,
Example
Reference
GSM 07.07
SW release
Version A
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Tri Band GPRS Data Terminal System
Rev.1
2.5.4.9 +CCLK - Clock Management
+CCLK – Clock Management
Execute command
Read command
AT+CCLK?
Write command
AT+CCLK = 
Test command
Example
Reports the current time stored in the internal Real Time Clock in the
format:
+CCLK: 
Stores in the internal Real Time Clock the current time defined by the
parameter 
Parameter:
 - current time in the format : "yy/MM/dd,hh:mm:ss±zz"
where:
yy - year
MM - month (in digits)
dd - day
hh - hour
mm - minute
±zz - time zone in quarter of an hour (difference between the GMT and
the local time)
AT+CCLK="02/09/07,22:30:00+04"
OK
Reference
AT+CCLK?
+CCLK: 02/09/07,22:30:25+4
OK
GSM 07.07
SW release
Version A
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.5.4.10
Rev.1
+CALA - Alarm Management
+CALA – Alarm Management
Execute command
Read command
AT+CALA?
Write command
AT+CALA = [
[,[,[,]]]]
Reports the current alarm time stored in the internal Real Time Clock,
if present, in the format:
+CALA: ,,[,]
Stores in the internal Real Time Clock the current alarm time and
settings defined by the parameters , ,,.
When the RTC time reaches the alarm time then the alarm starts, the
behaviour of the GM862-PCS depends upon the setting  and if
the device was already ON at the moment when the alarm time had
come.
Parameter:
 - current alarm time in the format : "yy/MM/dd,hh:mm:ss±zz"
as defined for +CCLK command.
 - alarm behaviour type
0 - reserved for other equipment use.
1 - the GM862-PCS simply wakes up fully operative as if the
ON/OFF pin had been pressed. If the device is already ON at the
alarm time, then it does nothing.
2 - the GM862-PCS wakes up in "alarm mode" if at the alarm time it
was off, otherwise it remains fully operative. In both cases the
GM862-PCS issues an unsolicited code every 3s:
+ALARM: 
Where  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 timeout
occurs. If the device is in "alarm mode" and it does not receive
the #WAKE command within 90s then it shuts down. (default)
3 - the GM862-PCS wakes up in "alarm mode" if at the alarm time it
was off, otherwise it remains fully operative. In both cases the
GM862-PCS starts playing the alarm tone on the selected path for
the 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 the
device is in "alarm mode" and it does not receive the #WAKE
command within 90s then it shuts down.
4 - the GM862-PCS wakes up in "alarm mode" if at the alarm time it
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Tri Band GPRS Data Terminal System
Rev.1
was off, otherwise it remains fully operative. In both cases the
GM862-PCS brings the pin GPIO6 high, provided its 
has been set to alarm output, and keeps it in this state until a
#WAKE or #SHDN command is received or a 90s timeout
occurs. 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 and
type=3.
6 - the GM862-PCS will make both the actions as for type=2 and
type=4.
7 - the GM862-PCS will make both the actions as for type=3 and
type=4.
 = 0 - index of the alarm
The only value supported for  is 0.
 - unsolicited alarm code text string
In the case that  is equal to 2 or 5 or 6, then the unsolicited
text parameter  can be set by this parameter.
Note: The "alarm mode" is indicated by hardware pin CTS to the ON
status and DSR to the OFF status, while the "power saving" status is
indicated by a CTS - OFF and DSR - OFF status. The normal operating
status is indicated by DSR - ON.
During the "alarm mode" the device will not make any network scan
and will not register to any network and therefore is not able to dial or
receive any call or SMS, the only commands that can be issued to the
GM862-PCS in this state are the #WAKE and #SHDN, every other
command must not be issued during this state.
Test command
AT+CALA=?
Example
Reference
SW release
Reports the supported range of values for the parameters ,,
 and  maximum length
AT+CALA="02/09/07,23:30:00+04"
OK
GSM 07.07
Version A
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.5.4.11
Rev.1
+CALM - alert sound mode
+CALM – alert sound mode
Execute command
Read command
Write command
AT+CALM = 
It is used to select the general alert sound mode of the device.
Parameter:
 = 0 - normal mode
 = 1 - silent mode (no sound will be generated by the device)
Note: if silent mode (1) is selected then incoming calls will not produce
alerting sounds but only the message RING or +CRING.
Test command
AT+CALM=?
Returns the supported values for the parameter .
Example
Reference
SW release
GSM 07.07
Version A
2.5.4.12
+CRSL - ringer sound level
+CRSL – ringer sound level
Execute command
Read command
AT+CRSL?
Write command
AT+CRSL = 
Test command
AT+CRSL=?
Example
Reference
SW release
Reports the current  setting of the call ringer in the format:
+CRSL: 
It used to select the incoming call ringer sound level of the device.
Parameter:  - ringer sound level
 = 0 - Off
 = 1 - low
 = 2 - middle
 = 3 - high
 = 4 – progressive
Reports  supported values range in the format:
+CRSL: (0-4)
GSM 07.07
Version A
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Tri Band GPRS Data Terminal System
2.5.4.13
Rev.1
+CLVL - loudspeaker volume level
+CLVL – loudspeaker volume level
Execute command
Read command
AT+CLVL?
Reports the current  setting of the loudspeaker volume in the
format: +CLVL: 
Write command
AT+CLVL = 
It used to select the volume of the internal loudspeaker audio output of
the device.
Parameter:  - loudspeaker volume varies between 0 (min) and
10 (max).
Test command
AT+CLVL=?
Reports  supported values range in the format:
+CLVL: (0-10)
Example
Reference
SW release
GSM 07.07
Version A
2.5.4.14
+CMUT - microphone mute control
+CMUT – microphone mute control
Execute command
Read command
AT+CMUT?
Write command
AT+CMUT = 
Reports the selected microphone (internal/external) mute status in the
format:
+CMUT: 
Enables/disables the muting of the microphone audio line depending
on n parameter value
Parameter:
 = 0 - microphone active
 = 1 - microphone muted
Note: this command mutes/activates both microphone audio paths,
internal mic and external mic.
Test command
AT+CMUT=?
Example
Reports the supported values for  parameter.
Reference
SW release
GSM 07.07
Version A
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Tri Band GPRS Data Terminal System
2.5.4.15
Rev.1
+CACM - accumulated call meter
+CACM – accumulated call meter
Execute command
Read command
AT+CACM?
Write command
AT+CACM = 
Reports the current value of the SIM ACM in the format
+CACM: 
Note: the value  is in units whose price and currency is defined
with command +CPUC
Resets the SIM Accumulated Call Meter (ACM). Internal memory
CCM remains unchanged.
Parameter:  - PIN2 password
Note: to access this command PIN2 password is required
Test command
Example
Reference
GSM 07.07
SW release
Version A
2.5.4.16
+CAMM - accumulated call meter maximum
+CAMM – accumulated call meter maximum
Execute command
Read command
AT+CAMM?
Reports the maximum value of ACM stored in SIM in the format:
+CAMM : 
Write command
Sets the Advice of Charge related Accumulated Call Meter ACM
AT+CAMM =
maximum value in SIM (see also +CACM command). This value
, 
represents the maximum number of home units allowed to be
consumed by the subscriber. When ACM reaches  value
further calls are prohibited. SIM PIN2 is required to set the value.
Parameter:
- maximum number of units allowed to be
consumed
- PIN2 password
Note: The  = 0 value disables the feature.
Test command
Example
Reference
GSM 07.07
SW release
Version A
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Tri Band GPRS Data Terminal System
2.5.4.17
Rev.1
+CPUC - price per unit and currency table
+CPUC – price per unit and currency table
Execute command
Read command
AT+CPUC?
Reports the current values of  and  parameters in the
format: +CACM : ,
Write command
AT+CPUC =
,
,
Sets the values of Advice of Charge related price per unit and
currency table in SIM. The price per Unit currency table
information can be used to convert the home units (as used in
commands +CAOC, +CACM and +CAMM) into currency
units.
Parameters:
 - three-character currency code string (e.g. LIT, USD,
DEM etc..)
 - price per unit string (dot is used as decimal separator) e.g.
1989.27
 - SIM PIN2
Note: SIM PIN2 is required to set the values.
Test command
Example
Reference
SW release
GSM 07.07
Version A
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Tri Band GPRS Data Terminal System
Rev.1
2.5.5 Mobile equipment errors
2.5.5.1 +CMEE - report mobile equipment error
+CMEE – report mobile equipment error
Execute command
Read command
Write command
AT+CMEE = 
Enables/disables the report of result code.
+CME ERROR: 
as an indication of an error relating to the +Cxxx commands issued.
When enabled, device related errors cause the +CME ERROR: 
final result code instead of the default ERROR final result code.
ERROR is anyway returned normally when the error message is
related to syntax, invalid parameters, or DTE functionality.
Parameter:
 - enable flag
 = 0 - disable +CME ERROR: reports, use only ERROR
report.
 = 1 - enable +CME ERROR: reports, with  in numeric
format
 = 2 - disable +CME ERROR:  reports, with  in verbose
format
Test command
Example
Reference
SW release
GSM 07.07
Version A
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Tri Band GPRS Data Terminal System
2.5.5.2 +CME ERROR: - ME error result code
This is NOT a command, it is the error response to +Cxxx GSM 07.07 commands.
Syntax: AT+CME ERROR:
Parameter:  - error code can be either numeric or verbose.
 values:
Numeric Format
Verbose Format
phone failure
no connection to phone
phone-adaptor link reserved
operation not allowed
operation not supported
PH-SIM PIN required
NOT SUPPORTED
NOT SUPPORTED
10
SIM not inserted
11
SIM PIN required
12
SIM PUK required
13
SIM failure
14
SIM busy
15
SIM wrong
16
incorrect password
17
SIM PIN2 required
18
SIM PUK2 required
20
memory full
21
invalid index
22
not found
23
memory failure
24
text string too long
25
invalid characters in text string
26
dial string too long
27
invalid characters in dial string
30
no network service
31
network timeout
32
network not allowed - emergency calls only
40
network persona lization PIN required
41
network personalization PUK required
42
network subset personalization PIN required
43
network subset personalization PUK required
44
service provider personalization PIN required
45
service provider personalization PUK required
46
corporate personalization PIN required
47
corporate personalization PUK required
100
unknown
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.5.6 Voice Control (TIA IS-101)
2.5.6.1 +VTS: - DTMF tones transmission
+VTS – DTMF tones transmission
Execute command
Read command
Write command
AT+VTS = 
Allows the transmission of DTMF tones
Parameter:
 - a single ASCII character in the set 0-9, #,*,A-D
Note: this commands operates in voice mode only
Test command
AT+VTS=?
Returns +VTS(),(),()
Example
Reference
SW release
GSM 07.07 / TIA IS-101
Version A
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.5.7 Commands For GPRS
2.5.7.1 +CGACT - PDP context activate or deactivate
+ CGACT – PDP context activate or deactivate
Execute command
Read command
AT+CGACT?
Returns the current activation states for all the defined PDP contexts.
Write command
AT+CGACT = [,
[, [,…]]]]
The command is used to activate or deactivate the specified PDP
context (s)
Parameters:
 - indicates the state of PDP context activation
0 - deactivated
1 - activated
 - a numeric parameter which specifies a particular PDP context
definition (see +CGDCONT command)
Test command
AT+CGACT=?
Reports information on the supported PDP context activation states
parameters in the format: +CGACT: (0,1)
Example
AT+CGACT?
+CGACT: 1,1
OK
Reference
AT+CGACT=1,1
OK
GSM 07.07
SW release
Version A
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Tri Band GPRS Data Terminal System
Rev.1
2.5.7.2 +CGATT - GPRS attach or detach
+ CGATT – GPRS attach or detach
Execute command
AT+CGATT = 
Read command
AT+CGATT?
Write command
Test command
AT+CGATT=?
Example
The command is used to attach the terminal to, or detach the terminal
from, the GPRS service depending on the parameter .
Parameter:
 - indicates the state of GPRS attachment
0 - detached
1 - attached
Returns the current GPRS service state.
Requests information on the supported GPRS service states.
AT+CGATT?
+CGATT: 0
OK
AT+CGATT=?
+CGATT: (0,1)
OK
AT+CGATT=1
OK
Reference
GSM 07.07
SW release
Version A
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Tri Band GPRS Data Terminal System
Rev.1
2.5.7.3 +CGDATA - Enter data state
+ CGDATA – Enter data state
Execute command
The command causes to perform whatever actions are necessary to
AT+CGDATA = [ establish communication with the network using one or more GPRS
PDP types.
,[ [, [,…]]]]
Parameters:
 - string parameter that indicates the layer 2 protocol to be used
"PPP" - PPP Point-to-point protocol
If the value is omitted, the layer 2 protocol is unspecified
 - numeric parameter which specifies a particular PDP context
definition (see +CGDCONT command).
Read command
Write command
Test command
AT+CGDATA=?
Requests information on the supported layer 2 protocols.
Reports the supported  parameters values
Example
AT+CGDATA=?
+CGDATA: (”PPP”)
OK
AT+CGDATA=”PPP”,1
OK
Reference
SW release
GSM 07.07
Version A
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Tri Band GPRS Data Terminal System
Rev.1
2.5.7.4 +CGDCONT - define PDP context
+ CGDCONT – define PDP context
Execute command
Read command
AT+CGDCONT?
Write command
AT+CGDCONT = [
[,
[,[,,

[,[,
[,…[,pdN]]]]]]]]]
Returns the current settings for each defined context in the format:
+CGDCONT : ,,,,
,, [,…[,pdN]]]]]]]]]
The command specifies PDP context parameter values for a PDP
context identified by the (local) context identification parameter,

Parameters:
 (PDP Context Identifier) : a numeric parameter which specifies
a particular PDP context definition. The range of permitted values
(minimum value = 1) is returned by the test form of the command.
 (Packet Data Protocol type) : a string parameter which
specifies the type of packet data protocol
"IP" - Internet Protocol
"PPP" - Point to Point Protocol
 (Access Point Name) : a string parameter which is a logical
name that is used to select the GGSN or the external packet data
network.
If the value is null or omitted, then the subscription value will be
requested.
: a string parameter that identifies the terminal in
the address space applicable to the PDP. The allocated address may be
read using the +CGPADDR command.
: a numeric parameter that controls PDP data compression
0 - off (default if value is omitted)
1 - on
: a numeric parameter that controls PDP header
compression
0 - off (default if value is omitted)
1 - on
, … : zero to N string parameters whose meanings are
specific to the 
Test command
AT+CGDCONT=?
Example
Returns values supported as a compound value
AT+CGDCONT?
+CGDCONT: 1, ”IP”, ”uni.tim.it”, ”10.10.10.10”,0,0
OK
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Tri Band GPRS Data Terminal System
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AT+CGDCONT=?
+CGDCONT: (1-3),”IP”,,,(0-1),(0-1)
OK
AT+CGDCONT=1, ”IP”, ”uni.tim.it”, ”10.10.10.10”,0,0
OK
Reference
GSM 07.07
SW release
Version A
3.3.7.1 +CGPADDR - show PDP address
+ CGPADDR – show PDP address
Execute command
Read command
Write command
Returns a list of PDP addresses for the specified context identifiers in
AT+CGPADDR = [ the format:
[, [,…]]]
+CGPADDR: ,
[+CGPADDR: ,]
Parameters:
 - a numeric parameter which specifies a particular PDP
context definition (see +CGDCONT command). If no  is
specified, the addresses for all defined contexts are returned.
 - a string that identifies the terminal in the
address space applicable to the PDP. The address may be static or
dynamic. For a static address, it will be the one set by the +CGDCONT
command when the context was defined. For a dynamic address it will
be the one assigned during the last PDP context activation that used the
context definition referred to by , is omitted if
none is available
Test command
AT+CGPADDR=?
Returns a list of defined s.
Example
AT+CGPADDR=1,2
+CGPADDR = 1,”10.10.15.15”
+CGPADDR = 2,”10.10.20.10”
OK
AT+CGPADDR=?
+CGPADDR: (1-3)
OK
Reference
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SW release
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Tri Band GPRS Data Terminal System
Rev.1
2.5.7.5 +CGREG - GPRS network registration status
+ CGREG – GPRS network registration status
Execute command
Read command
AT+CGREG?
Write command
AT+CGREG = 
Test command
AT+CGREG=?
Example
Reference
SW release
Returns the status of result code presentation mode  and the integer
 which shows whether the network has currently indicated the
registration of the terminal in the format: +CGREG:,.
The command controls the presentation of an unsolicited result code
+CGREG: 
when =1 and there is a change in the terminal GPRS network
registration status, or an unsolicited code
+CGREG: [,,]
when =2 and there is a change of the network cell.
Parameter:
 - result code presentation mode
0 - disable network registration unsolicited result code
1 - enable network registration unsolicited result code
+CGREG: 
2 - enable network registration and location information unsolicited
result code +CGREG:[,,]
where:
 - location area code in hexadecimal format
(e.g. "00C3" equals 195 in decimal)
 - cell ID in hexadecimal format
 - 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, roaming
Returns supported values for parameter 
GSM 07.07
Future Software Release
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Tri Band GPRS Data Terminal System
Rev.1
3.3.7.2 +CGQMIN - quality of service profile (minimum acceptable)
+ CGQMIN – quality of service profile (minimum acceptable)
Execute command
Read command
Returns the current settings for each defined context in the format:
+CGQMIN: ,,,,,
AT+CGQMIN?
Example
Write command
AT+CGQMIN = [
[,
[, [,
[, [,]]]]]]
This command allows to specify a minimum acceptable profile which
is checked by the terminal against the negotiated profile returned in the
Activate PDP Context Accept message
Parameters:
 - PDP context identification (see +CGDCONT command).
The following parameters are defined according to GSM 03.60:
 - precedence class
 - delay class
 - reliability class
 - peak throughput class
 - mean throughput class
Test command
AT+CGQMIN=?
Example
If a value is omitted for a particular class then this class is not checked.
Returns values supported as a compound value.
AT+CGQMIN=1,0,0,3,0,0
OK
AT+CGQMIN?
+CGQMIN: 1,0,0,5,0,0
OK
AT+CGQMIN=?
+CGQMIN: (0-3),(0-3),(0-5),(0-9),(0-19,31)
OK
Reference
SW release
GSM 07.07
Version A
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3.3.7.3 +CGQREQ - quality of service profile (requested)
+ CGQREQ – quality of service profile (requested)
Execute command
Read command
AT+CGQREQ?
Write command
AT+CGQREQ = [
[,
[, [,
[, [,]]]]]]
Returns the current settings for each defined context in the format:
+CGQREQ: ,,,,,
The command allows to specify a Quality of Service Profile that is
used when the terminal sends an Activate PDP Context Request
message to the network. It specifies a profile for the context identified
by the (local) context identification parameter, .
Parameters:
 - PDP context identification (see +CGDCONT command).
The following parameters are defined according to GSM 03.60:
 - precedence class
 - delay class
 - reliability class
 - peak throughput class
 - mean throughput class
Test command
AT+CGQREQ=?
Example
If a value is omitted for a particular class then this class is not checked.
Returns parameter values supported as a compound value.
AT+CGQREQ?
+CGQREQ: 1,0,0,3,0,0
OK
AT+CGQREQ=1,0,0,3,0,0
OK
AT+CGQREQ=?
+CGQREQ: (0-3),(0-3),(0-5),(0-9),(0-19,31)
OK
Reference
GSM 07.07
SW release
Version A
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Rev.1
2.5.8 Commands For Battery Charger
2.5.8.1 +CBC - Battery Charge
+ CBC – Battery Charge
Execute command
Read command
AT+CBC
Returns the current Battery Charge status in the format:
+CBC: ,
Parameter:
 - battery status
0 - Me is powered by the battery
 - 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 command
Test command
AT+CGACT=?
Example
Reports information on the supported PDP context activation states
parameters in the format: +CGACT: (0,1)
AT+CBC
+CBC: 0,75
OK
NOTE
The ME does not make differences between being powered by a
battery or by a power supply on the VBATT pins, so it is not possible
to distinguish between these two cases.
Reference
SW release
GSM 07.07
Version A
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Rev.1
2.6 ETSI GSM 07.05 AT Commands for SMS and
CB services
2.6.1 General configuration
2.6.1.1 +CSMS - select message service
+CSMS – select message service
Execute command
Read command
AT+CSMS?
Write command
AT+CSMS = 
Test command
AT+CSMS=?
Example
Reference
SW release
Reports the value of the current parameters in the format:
+CSMS: ,,,
where:
 - message syntax
0 - SMS syntax as defined in GSM-03.40 and GSM-03.41. AT
commands are compatible with GSM 07.05 Phase 2.
1 - SMS syntax as defined in GSM-03.40 and GSM-03.41. AT
commands are compatible with GSM 07.05 Phase 2+
 - Mobile Terminated Messages
 - Mobile Originated Messages
 - Cell Broadcast Messages
0 - not supported
1 - supported
Selects the SMS & CB services command syntax.
Parameter:
 = 0 - SMS syntax as defined in GSM-03.40 and GSM03.41. AT commands are compatible with GSM 07.05 Phase 2.
 = 1 - SMS syntax as defined in GSM-03.40 and GSM-03.41.
AT commands are compatible with GSM 07.05 Phase 2+
Reports the supported value of the parameter  = 0.
GSM 07.05
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2.6.1.2 +CPMS - preferred message storage
+CPMS – preferred message storage
Execute command
Read command
AT+CPMS?
Reports the message storage status in the format:
+CPMS:,,,,,,,,
where  ,  and  are the selected storage
memories for reading, writing and storing respectively.
Write command
Selects memory storages ,  and  to be used
AT+CPMS =
,,
 - memory storage for read and delete SMS commands
"SM" - SIM SMS memory storage
"ME" - Mobile Equipment internal storage (read only, no delete)
 - memory storage for write and send SMS commands
"SM" - SIM SMS memory storage
 - memory storage for received SMS storing
"SM" - SIM SMS memory storage
The command returns the memory storage status in the format:
+CPMS:,,,,,
 - number of SMS stored into 
 - max number of SMS that  can contain
 - number of SMS stored into 
 max number of SMS that  can contain
 - number of SMS stored into 
 max number of SMS that  can contain
Note: The only memory storage for writing and sending supported is
the SIM internal memory "SM", so  =  = "SM".
Note: the received class 0 SMS are stored in the "ME" memory
regardless the  setting and they are automatically deleted at
power off.
Test command
AT+CPMS=?
Reports the supported values of the SMS storage memories in the
format: +CPMS: ("ME","SM"), ("SM")
Example
AT+CPMS?
Reference
+CPMS: "SM",5,10,"SM",5,10,"SM",5,10
OK (you have 5 SMS SIM positions occupied of 10)
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2.6.1.3 +CMGF - message format
+CMGF –message format
Execute command
Read command
AT+CMGF?
Write command
AT+CMGF = 
Reports the current value of the parameter  = 0.
Selects the SMS format to be used in reading and writing messages.
Parameter:
 = 0 - PDU as defined in GSM 3.40 and GSM 3.41
 = 1 - text
Test command
AT+CMGF=?
Reports the supported value of  parameter.
Example
Reference
SW release
GSM 07.05
Version A
2.6.1.4 +CSMP – Set parameters in text mode
+CSMP –set parameters in text mode
Execute command
Read command
AT+CSMP?
Write command
AT+CSMP =
,,,

Test command
AT+CSMP=?
Example
Reference
SW release
Reports the current setting in the format:
+CSMP: < fo>,,,
Set the additional parameters for storing and sending SMS when the
text mode is used (+CMGF=1)
Parameter:
: message format, like defined for the first octet of message
according to GSM 3.40
: Message validity period - numerical if in relative format or
string if in absolute format according to GMS 3.40
: Protocol Identifier – defined by GSM 3.40 – in numerical
format
: Data coding Scheme - defined by GSM 3.40 – in numerical
format
Reports the supported range of values for
,,, parameters.
Set the parameters for an outgoing message with 24 hours of validity
period and default properties:
AT+CSMP=17,167,0,0
OK
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2.6.1.5 +CSDH – Show parameters in text mode
+CSDH –show parameters in text mode
Execute command
Read command
AT+CSDH?
Report the current setting in the format:
+CSDH: 
Write command
AT+CSDH= 
Show the additional parameters of received or stored SMS when the
text mode is used (+CMFG=1).
Parameter:
 = 0 - no additional parameters are shown
 = 1 - parameters set by the +CSCA and + CSMP commands
are shown and the length, sender/addressee address of SMS when
+CMT, +CMGL, +CMGR commands are utilised
Test command
AT+CSDH=?
Reports the supported range of values for the parameter

Example
Reference
SW release
GSM 07.05
Version A
2.6.1.6 +CSAS – Save setting text mode
+CSAS –set saving text mode
Execute command
Read command
Write command
AT+CSAS=
Save setting which have been made by the +CSCA and +CSMP
commands in local volatile memory (or in the SIM if it has a dedicated
storage for this purpose).
Parameter:
: 0…3 - number of profile in which to save the setting.
The number 0 corresponds to the non volatile memory, the others
correspond to the SIM storage (if available).
Test command
AT+CSAS=?
Example
Return the possible range of values for the parameter .
Reference
SW release
GSM 07.05
Version A
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2.6.1.7 +CRES – Restore text mode settings
+CRES –restore text mode settings
Execute command
Read command
Write command
AT+CRES = 
Test command
AT+CRES=?
Example
Reference
SW release
Restore any setting saved by +CSAS command for +CSCA and
+CSMP commands in local non volatile memory (or in the SIM if it
has a dedicated store for this purpose).
Parameter:
: 0…3 – number of profile from which to recall the setting.
The number 0 corresponds to the non volatile memory, the others
correspond to the SIM storage (if available).
Return the possible range of values for the parameter .
GSM 07.05
Version A
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2.6.1.8 +CSCB – Select Cell Broadcast Message types
+CSCB –select Cell Broadcast Message types
Execute command
Read command
AT+CSCB?
Reports the current value of the parameters , and
 in the format:
+CSCB: ,,
Write command
AT+CSCB=
Selects the Cell Broadcast message types to be received by the device.
[,[, Parameter:
]]

0 - the message types defined by  and  are accepted
1 - the message types defined by  and  are rejected
 : all the possible combinations of the CBM identifiers
 : all the possible combinations of CBM data coding schemes.
Test command
AT+CSCB=?
Example
Reference
SW release
Return the possible range of values for the parameter .
AT+CSCB?
+CSCB: 1,"","" (all CBMs are accepted, none is rejected)
OK
AT+CSCB=0,"0,1,300-315,450","0-3"
OK
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2.6.1.9 +CMS ERROR - message service failure result code
This is NOT a command, it is the error response to +Cxxx GSM 07.05 commands
Syntax: AT+CMS ERROR:
Parameter:  - error code can be either numeric or verbose.
 values:
Numeric Format
Verbose Format
0...127
GSM 04.11 Annex E-2 values
128...255
GSM 03.40 sub clause 9.2.3.22 values
300
ME failure
301
SMS service of ME reserved
302
operation not allowed
303
operation not supported
304
invalid PDU mode parameter
305
invalid text mode parameter
310
SIM not inserted
311
SIM PIN required
312
PH-SIM PIN required
313
SIM failure
314
SIM busy
315
SIM wrong
316
SIM PUK required
317
SIM PIN2 required
318
SIM PUK2 required
320
memory failure
321
invalid memory index
322
memory full
330
SMSC address unknown
331
no network service
332
network timeout
340
no +CNMA acknowledgement expected
500
unknown error
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2.6.2 Message configuration
2.6.2.1 +CSCA - service center address
+CSCA –service center address
Execute command
Read command
AT+CSCA?
Write command
AT+CSCA=,

Reports the current value of the default SCA in the format:
+CSCA: ,
Note: if SCA is not present the device reports an error message.
Sets the Service center Address to be used for mobile originated SMS
transmissions.
Parameter:
 - SC phone number in the format defined by 
 - the type of number
 = 145 - international numbering scheme (contains the character
"+")
 = 129 - national numbering scheme
Note: to use the SMS service, is mandatory to set a Service Center
Address at which service requests will be directed. SCA depends on
the operator, hence contact your operator to set the right SCA. When
this address is input, it is stored on the SIM if possible, else will be
stored on the device internal memory so, once set, the input of this
parameter is not anymore needed.
In PDU mode, this setting is used, but only when the length of the
SMSC address coded into the  parameter equals zero; else SCA
defined in the PDU will be used instead.
Test command
Example
Reference
SW release
GSM 07.05
Version A
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2.6.3 Message receiving and reading
2.6.3.1 +CNMI - new message indications to Terminal Equipment
+CNMI – new message indications to terminal equipment
Read command
AT+CNMI?
Returns the current parameter settings for +CNMI command in the
form:
AT+CNMI:,,,,
Write command
AT+CNMI=[, Selects the behavior of the device on how the receiving of new
messages from the network is indicated to the DTE.
[,[,[,]]]]
Parameter:
- unsolicited result codes buffering option
0 - buffer unsolicited result codes in the TA in case the DTE is
busy, e.g. a data call is active meanwhile.
1- 1 Discard indication and reject new received message
unsolicited result codes when TA-TE link is reserved, otherwise
forward them to the TE.
2 - buffer unsolicited result codes in the TA in case the DTE is
busy and flush them to the TE after reservation. Otherwise report
them immediately.
 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 using
unsolicited result code:
+CMTI: ,
where
 - memory storage where the new message is stored
("SM" or "ME")
 - location on the memory where SMS is stored
 - broadcast reporting option
0 - Cell Broadcast Messages are not sent to the DTE
2 - New Cell Broadcast Messages are sent to the DTE with the
unsolicited result code:
+CBM:  ( in PDU mode)
or
+CBM:,,,, (in text
mode)
where:
 - PDU length
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+CNMI – new message indications to terminal equipment
 - message PDU
 - message serial number
 - message ID
 - Data Coding Scheme
 - page number
 - total number of pages of the message
 - message text
 - 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 result
code:
+CDS:  (PDU mode)
or
+CDS: ,,,,,, (text mode)
2 - if a status report is stored, then unsolicited result code is sent:
+CDSI: ,
where
 - memory storage where the new message is stored
("SM")
 - location on the memory where SMS is stored
 - PDU length
 - message PDU
 - first octet of the message PDU
 - message reference number
 - arrival time of the message to the SC
 - sending time of the message
 - message status as coded in the PDU
 - buffered result codes handling method (NOT
SUPPORTED)
0 - buffer flushed. (NOT SUPPORTED)
Note: DTR signal is ignored, hence the indication is sent even if the
DTE is inactive ( DTR signal is Low). In this case the unsolicited
result code may be lost so if GM862-PCS remains active while DTE
is not, at DTE startup is suggested to check whether new messages
have reached the device meanwhile with command AT+CMGL=0
that lists the new messages received.
Test command
AT+CNMI=?
Reports the supported range of values for the +CNMI command
parameters.
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+CNMI – new message indications to terminal equipment
Reference
SW release
GSM 07.05
Version A
2.6.3.2 +CMGL - list messages
+CMGL – list messages
Execute command
Read command
Write command
AT+CMGL = 
Reports the list of all the messages stored into  (see
command +CPMS ) memory storage having the status equal to 
parameter.
Parameter (PDU Mode):

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: ,,
where
 - message position in the memory storage list.
 - status of the message
 - length of the PDU in bytes
 - message in PDU format according to GSM 3.40
Note: OK message is sent only at the end of the listing.
Parameter (Text Mode):

"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:
,,[,,,,]
where
 - message position in the storage
 - message status
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+CMGL – list messages
 - originator/destination number
< tooa/toda > - type of number 
145 - number in international format (contains the "+")
129 - number in national format
 - text length
 - message text
For each message delivery confirm a result code is reported in the
format:
+CMGL: ,,,,,,,
,
Where
 - message position in the storage
 - message status
 - first octet of the message PDU
 - message reference number
 - arrival time of the message to the SC
 - sending time of the message
 - message status as coded in the PDU
Test command
Example
Reference
SW release
GSM 07.05
Version A
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2.6.3.3 +CMGR - read message
+CMGR – read message
Execute command
AT+CMGR = 
Reports the message with location value  from preferred
message storage  (see +CPMS) in the format:
(PDU Mode)
+CMGR: ,
where
 - status of the message
0 - new message
1 - read message
2 - stored message not yet sent
3 - store message already sent
 - length of the PDU in bytes.
 - message in PDU format according to GSM 3.40.
(Text Mode)
For the sent messages:
+CMGR: ,,, [,,,,,,
,]
For the received messages:
+CMGR: ,[,,,,,,,
,,]
For the message delivery confirm:
+CMGR: ,,,,,,
,
Where:
 - 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
 - first octet of the message PDU
 - message reference number
 - arrival time of the message to the SC
 - sending time of the message
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 - message status as coded in the PDU
 - Protocol Identifier
 - Data Coding Scheme
 - Originator address number
 - Destination address number
 - Service Centre number
< tooa>,, - type of number ,,
145 - number in international format (contains the "+")
129 - number in national format
 - text length
 - message text
The status of the message and entire message data unit  is
returned. If status of the message is 'received unread', status in the
storage changes to 'received read'.
Parameter: 
Note: if record number  on message storage memory is
empty, then an error message will be returned.
Read command
Write command
Test command
Example
Reference
SW release
GSM 07.05
Version A
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2.6.4 Message sending and writing
2.6.4.1 +CMGS - send message
+CMGS – send message
Execute command
(PDU Mode)
AT+CMGS = 
(Text Mode)
AT+CMGS=
(PDU Mode)
Sends to the network a SMS message input as a PDU.
Parameter:
 = 8…176 - represents the length of the PDU to be sent in
bytes.
The device responds to the command with the prompt '>' and awaits
for the number of bytes of PDU specified.
To complete the operation send Ctrl-Z char (0x1A hexadecimal) , to
exit without sending the message send ESC char (0x1B
hexadecimal ).
If message is successfully sent to the network, then the result is sent
in the format:
+CMGS: 
where  is the message reference number.
If message sending fails for some reason, an error code is reported.
(Text Mode)
Sends to the network a SMS message input as a text message.
Parameter:
 = destination address number
The device responds to the command with the prompt '>' and awaits
for message text (max 160 characters).
To complete the operation send Ctrl-Z char (0x1A hexadecimal) , to
exit without sending the message send ESC char (0x1B
hexadecimal).
If message is successfully sent to the network, then the result is sent
in the format:
+CMGS: 
where  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 command
execution, which might take several seconds, no other SIM
interacting commands are issued.
To avoid malfunctions is suggested to wait for the
+CMGS: or +CMS ERROR: response
before issuing further commands.
Read command
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+CMGS – send message
Write command
Test command
Example
Reference
SW release
GSM 07.05
Version A
2.6.4.2 +CMSS - send message from storage
+CMSS – send message from storage
Execute command
AT+CMSS = 
Sends to the network, the message which is already stored in the
 storage (see +CPMS) at the location .
Parameter: 
If message is successfully sent to the network, Sends to the network,
then the result is sent in the format:
+CMSS: 
where  is the message reference number.
If message sending fails for some reason, an error code is reported:
+CMS ERROR:
Note: to store a message in the  storage see command
+CMGW.
Care must be taken to ensure that during the command execution,
which might take several seconds, no other SIM interacting
commands are issued.
To avoid malfunctions is suggested to wait for the +CMGS: or
+CMS ERROR: response before issuing further commands.
Read command
Write command
Test command
Example
Reference
GSM 07.05
SW release
Version A
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2.6.4.3 +CMGW - write message to memory
+CMGW – write message to memory
Execute command
(PDU Mode)
AT+CMGW = 
(Text Mode)
AT+CMGW = []
(PDU Mode)
Writes in the  memory storage a new SMS message input as
a PDU.
Parameter:
 - represents the length of the PDU to be written in bytes.
The device responds to the command with the prompt '>' and awaits
for the number of bytes of PDU specified.
To complete the operation send Ctrl-Z char (0x1A hexadecimal) , to
exit without writing the message send ESC char (0x1B hexadecimal).
If message is successfully written in the memory, then the result is
sent in the format:
+CMGW: 
where  is the message location index in the memory
("SM").
If message storing fails for some reason, an error code is reported
(Text Mode)
Writes in the  memory storage a new SMS message input as
Text.
Parameter:
 - destination address number
The device responds to the command with the prompt '>' and awaits
for the message text ( max 160 characters).
To complete the operation send Ctrl-Z char (0x1A hexadecimal) , to
exit without writing the message send ESC char (0x1B hexadecimal).
If message is successfully written in the memory, then the result is
sent in the format:
+CMGW: 
where  is the message location index in the memory
("SM").
If message storing fails for some reason, an error code is reported
Note: Care must be taken to ensure that during the command
execution, no other SIM interacting commands are issued.
To avoid malfunctions is suggested to wait for the +CMGS: or
+CMS ERROR: response before issuing further commands.
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+CMGW – write message to memory
Read command
Write command
Test command
Example
Reference
GSM 07.05
SW release
Version A
2.6.4.4 +CMGD - delete message
+CMGD – delete message
Execute command
AT+CMGD =
[,]
Deletes from memory the message/messages
Note: if the location to be deleted is empty, an error message is
reported.
Parameter:
 - message position index in the selected storage 
 - delete mode selection flag
0 (or not present) - delete message at position 
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 command
Write command
Test command
Example
Reference
GSM 07.05
SW release
Version A
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2.7 Custom AT Commands
2.7.1 General configuration
2.7.1.1 #CAP - Change Audio Path
#CAP – change audio path
Execute command
AT#CAP = 
Switches the active audio path depending on parameter 
Parameter:
 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 path
Note: The audio path are mutually exclusive, enabling one disables the
other.
When changing the audio path, the volume level is set at the previously
stored value for that audio path. (see AT+CLVL).
Read command
AT#CAP?
Write command
Test command
AT#CAP=?
Example
Reference
SW release
Reports the active audio path in the format: #CAP: .
Reports the supported values for the parameter .
Telit GM862-PCS AT Command Specification
Version A
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2.7.1.2 #SRS - Select ringer sound
#SRS – select ringer sound
Execute command
AT#SRS =
[,]
Set the ringer sound. The parameters are:
 - ringing tone
0 - current ringing tone
1 .. 12 - ringing tone number
 ringing tone playing timeout in seconds.
0 - no ringing tone playing, only tone setting
1 .. 60 -  tone playing for  seconds and successive
tone setting.
Note: When the command is issued with  >0, the 
ringing tone is played for  seconds and then stored as current
tone.
If command is issued with  = 0, the playing of the ringing is
stopped (if present) and  ringing tone is set as default.
If command is issued with  = 0 and  >0 then the default
ringing tone is played.
If both  and  are 0 then currently playing tone is set as
default and ringing is stopped.
Read command
AT#SRS?
Reports current selected ringing and its status in the form:
#SRS: ,
where:
 ringing tone number
1 .. 12
 ringing status
0 - selected but not playing
1 - currently playing
Write command
Test command
AT#SRS=?
Reports the supported values for the parameters  and 
Example
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.7.1.3 #SRP –Select Ringer Path
#SRP – select ringer path
Execute command
AT#SRP=
Selects the audio path towards whom sending ringer sounds and all
signaling tones.
Parameter:
 - Ringer path number
0 - sound output towards current selected audio path (see
command #CAP)
1 - sound output towards handsfree
2 - sound output towards headset
3 - sound output towards Buzzer Output pin GPIO7
Note: In order to use the Buzzer Output an external circuitry must be
added to drive it properly from the GPIO7 pin, furthermore the
GPIO7 pin direction must be set to Buzzer output (Alternate function)
see command #GPIO.
Read command
AT#SRP?
Reports the current ringer path setting in the format: #SRP:.
Write command
Test command
AT#SRP=?
Reports the supported values for the parameter .
Example
AT#SRP=?
#SRP=(0-3)
OK
AT#SRP=3
OK
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.7.1.4 #STM - Signalling Tones Mode
#STM – signalling tones mode
Execute command
Read command
AT#STM?
Write command
AT#STM = 
Test command
AT#STM=?
Example
Reference
SW release
Reports the current signaling tones status in the format:#STM: 
Enables/disables the signaling tones output on the audio path selected
with #SRP command
Parameter :
 - signaling tones status
 = 0 - signaling tones disabled
 = 1 - signaling tones enabled
Reports supported range of values for  parameter.
Telit GM862-PCS AT Command Specification
Version B
2.7.1.5 #PCT – display PIN Counter
#PCT – display PIN counter
Execute command
Read command
AT#PCT?
Reports the PIN/PUK or PIN2/PUK2 input remaining attempts,
depending on +CPIN requested password in the format:
#PCT:
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 for
other three time then #PCT:0 and SIM remains blocked.
Write command
Test command
Example
Reference
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Tri Band GPRS Data Terminal System
Rev.1
2.7.1.6 #SHDN – Software Shut Down
#SHDN – software shutdown
Execute command
AT#SHDN
After the issuing of this command device detaches from the network
and shuts down. Before definitive shut down an OK response is
returned.
Note: after the issuing of this command any previous activity is
terminated and the device will not respond to any further command.
To turn it on again Hardware pin ON/OFF must be tied low.
Read command
Write command
Test command
Example
Reference
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.7.1.7 #WAKE – Wake from Alarm mode
#WAKE – Wake from Alarm Mode
Execute command
AT#WAKE=0
Read command
AT#WAKE?
After the issuing of this command device exits the "Alarm mode" and
enters the normal operating mode. After entering in normal operating
mode an OK response is returned.
With the execution of is command all Alarm activity (for example
alarm tone playing ) is immediately terminated.
If the command is issued during the normal operating mode then the
only action is to stop Alarm activity, if present, and return OK
response.
This command returns the operating mode status of the device in the
format:
#WAKE: 
where:
 - operating mode
0 - normal operating mode
1 - alarm mode
Note: The "alarm mode" is indicated by hardware pin CTS to the ON
status and DSR to the OFF status, while the "power saving" status is
indicated by a CTS - OFF and DSR - OFF status. The normal
operating status is indicated by DSR - ON.
During the "alarm mode" the device will not make any network scan
and will not register to any network and therefore is not able to dial
or receive any call or SMS, the only commands that can be issued to
the GM862-PCS in this state are the #WAKE and #SHDN, every
other command must not be issued during this state.
Write command
Test command
Example
Reference
Telit GM862-PCS AT Command Specification
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.7.1.8 #QTEMP –Query Temperature overflow
#QTEMP – query temperature overflow
Execute command
Read command
AT#QTEMP?
Write command
AT#QTEMP = 
Queries the internal temperature sensor of the device for over
temperature. The result is reported in the format:
#QTEMP:
where
 - over temperature indicator
 = 0 - device temperature is in the working range
 = 1- device temperature is out of the working range, may be
too high or too low.
Note: The device should not be operated out of its working temperature
range; if temperature is out of range proper functioning of the device is
not ensured.
Sets the type of indication.
Parameter:
 - type of indication
0 - result reported only when querying with #QTEMP?
1 - reserved for future use
2 – reserved for future use
Test command
#QTEMP=?
Reports supported range of values for  parameter.
Example
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.7.1.9 #SGPO –Set General Purpose Output
#SGPO – set general purpose output
Execute command
Read command
AT#SGPO?
Write command
AT#SGPO = 
Test command
AT#SGPO=?
Reports the #SGPO command setting, hence the opposite status of the
open collector pin in the format: #SGPO: .
Sets the value of the general purpose output pin GPIO2 according to
 parameter
Parameter:

0 - output pin cleared to 0 (LOW)
1 - output pin set to 1 (HIGH)
Note: The GPIO2 is an OPEN COLLECTOR output, the command
sets the transistor base level, hence the open collector output is
negated:
AT#SGPO= 0 sets the open collector output HIGH
AT#SGPO= 1 sets the open collector output LOW
A pull up resistor is required on pin GPIO2.
Reports the supported range of values of the command parameter
.
Example
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.7.1.10
Rev.1
#GGPI – Read General Purpose Input
#GGPI – read general purpose input
Execute command
Read command
AT#GGPI?
Write command
AT#GGPI = 
Reports the read value for the input pin GPIO1in the format:
#GGPI: ,
where
 direction setting (see #GGPI= )
 - logic value read from pin GPIO1
Note: Since the reading is done after the insulating transistor, the
reported value is the opposite of the logic status of the GPIO1 input
pin.
Set the General purpose input pin behavior depending on parameter
.
Parameter:  - auxiliary input GPIO1 setting
 = 0 - the read command reports the logic input level read from
GPIO1 pin.
 = 1…255 - reserved for future use
Note: The device has an insulated input pin ( the input goes the base of
an internal decoupling transistor) which can be used as a logic general
purpose input. This command sets the read behaviour for this pin, since
only direct read report is supported, the issue of this command is not
needed.
In future uses the behavior of the read input may be more complex.
Test command
Example
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.7.1.11
Rev.1
#GPIO –General Purpose Input/Output pin control
#GPIO –General Purpose Input/Output pin control
Execute command
Read command
AT#GPIO=,2
Write command
AT#GPIO =,
,
Reports the read value for the pin GPIO in the format:
#GPIO: ,
where
 - current direction setting for the GPIO
 - logic value read from pin GPIO in the case the pin
 is set to input;
- logic value present in output of the pin GPIO in the case
the pin  is currently set to output;
- no meaning value for the pin GPIO in the case
the pin  is set to alternate function;
Note for GPIO1: Since the reading is done after the insulating
transistor, the reported value is the opposite of the logic status of the
GPIO1 input pin.
Sets the value of the general purpose output pin GPIO according
to  and  parameter.
Not all configuration for the three parameters are valid.
Parameter:
 - GPIO pin number
supported range is from 1 to 7, but GPIO1 is input only and GPIO2
is output only.
 - GPIO pin direction
0 - pin direction in INPUT
1 - pin direction is OUTPUT
2 - pin direction is ALTERNATE FUNCTION *see Note
 - its meaning depends on  setting:
0 - no meaning if  = 0 - INPUT
- output pin cleared to 0 (LOW) if  = 1 - OUTPUT
- no meaning if  = 2 - ALTERNATE FUNCTION
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Tri Band GPRS Data Terminal System
Rev.1
1 - no meaning if  = 0 - INPUT
- output pin set to 1 (HIGH) if  = 1 - OUTPUT
- no meaning if  = 2 - ALTERNATE FUNCTION
2 - Reports the read value from the input pin (see Read command) if
 = 0 - INPUT
- Reports the read value from the input pin (see Read command) if
 = 1 - OUTPUT
- Reports a no meaning value (see Read command) if  = 2 ALTERNATE FUNCTION
Note: "ALTERNATE FUNCTION" value is valid only for pins
GPIO6 - 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/write
access to that pin is not accessible and shall be avoided.
Note: The GPIO2 is an OPEN COLLECTOR output, the command
sets the transistor base level, hence the open collector output is negated
Test command
AT#GPIO=?
Example
Reports the supported range of values of the command parameters
,,.
AT#GPIO=3,0,1
OK
AT#GPIO=3,2
#GPIO: 1,0
OK
AT#GPIO=4,1,1
OK
AT#GPIO=5,0,0
OK
AT#GPIO=6,2
#GPIO: 0,1
OK
AT#GPIO=7,0,0
OK
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.7.1.12
Rev.1
#MONI – Monitor Cells
#MONI – monitor cell
Execute command
AT#MONI
Reports the available data for cell and dedicated channel (if exists) in
the format:
#MONI:  BSIC: RxQual: LAC:
Id: ARFCN: PWR: dBm
or in the case the network name is not known:
#MONI: Cc: Nc: BSIC: RxQual: LAC:
Id: ARFCN: PWR: dBm
or in the case in which the data of the adjacent cell are under
observation (number>0):
#MONI: Adj Cell [LAC: Id:] ARFCN:
PWR: dBm
where:
netname = name of network operator
cc = country code
nc = network operator code
n = progressive number of adjacent cell
bsic = base station identification code
qual = quality of reception (0-7)
lac = localization area code
id = cell identifier
arfcn = assigned radio channel
dBm = received signal strength in dBm
Read command
Write command
AT#MONI =
Test command
AT#MONI=?
(Version B)
Set the neighbor cell to extract data of the cell number 
Parameter: 
Reports the available neighbour cells and current cell preset in the
format: #MONI: 
where:
 - neighbour cells number
 - cell preset = 0, …, n where 0 is the serving cell
Example
Note
Reference
The refresh time of the measures is preset to 3 sec
Telit GM862-PCS AT Command Specification
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Tri Band GPRS Data Terminal System
2.7.1.13
Rev.1
#QSS – Query SIM Status
#QSS – query SIM status
Execute command
Read command
AT#QSS?
Reports the query SIM status in the format:
#QSS: ,
where
: type of enabled notification
 = 0 - query only
 = 1 - send unsolicited indication (#USS) every change of state
: current SIM status
 = 0 - SIM NOT INSERTED
 =1 - SIM INSERTED
Write command
AT#QSS = 
Set the type of notification.
If enabled (mode = 1) at any status change is send:
#USS: 
Parameter: 
Test command
AT#QSS=?
Returns the supported range of values of the parameter .
Example
Reference
Telit GM862-PCS AT Command Specification
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.7.1.14
Rev.1
#ACAL – Set Automatic Call
#ACAL – set automatic call
Execute command
Read command
AT#ACAL?
Write command
AT#ACAL = 
Returns the current status in the format:
#ACAL: 
Enable the automatic call.
Parameter:
 = 0 – disable
 = 1 – enable
If enabled, the transition OFF/ON of DTR causes an automatic data
call to the number stored in position number 1 of the phone book.
The &D command must be set to 2.
Test command
AT#ACAL=?
Example
Returns the supported range of values of the parameter .
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.7.1.15
Rev.1
#SMOV – SMS Overflow
#SMOV – SMS overflow
Execute command
Read command
AT#SMOV?
Write command
AT#SMOV= 
Return the current status in the format: #SMOV: .
Enable the signalling of SMS overflow
Parameter:
 = 0 - disable
 = 1 - enable
If enable, when the maximum storage capacity has came, the
#USMO: network initiated notification is send.
Test command
AT#SMOV=?
Returns the supported range of values of the parameter .
Example
Reference
Telit GM862-PCS AT Command Specification
SW release
Version A
2.7.1.16
#SHFEC – Set Handsfree echo canceller
#SHFEC – set handsfree echo canceller
Execute command
Read command
AT#SHFEC?
Write command
AT#SHFEC= 
Test command
AT#SHFEC=?
Example
Reference
SW release
Return the current status in the format: #SHFEC: .
Set echo canceller on audio handsfree output.
Parameter :
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.
Returns the supported range of values of the parameter .
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Tri Band GPRS Data Terminal System
2.7.1.17
#HFMICG – Handsfree Microphone Gain
#HFMICG – handsfree microphone gain
Execute command
Read command
AT#HFMICG?
Write command
AT#HFMICG = 
Test command
AT#HFMICG=?
Example
Reference
SW release
2.7.1.18
Return the current status of handsfree input gain in the format:
#HFMICG: 
Set the microphone input gain
Parameter:
: handsfree microphone input gain
0 - 7 handsfree microphone gain (+6dB/step)
8…255 reserved
Returns the supported range of values of the parameter .
Telit GM862-PCS AT Command Specification
Version A
#HSMICG – Handset Microphone Gain
#HSMICG – handset microphone gain
Execute command
Read command
AT#HSMICG?
Write command
AT#HSMICG = 
Return the current status of handset input gain in the format:
#HSMICG: 
Set the microphone input gain
Parameter:
: handset microphone input gain
0 - 7 handset microphone gain (+6dB/step)
8…255 reserved
Test command
AT#HSMICG=?
Example
Returns the supported range of values of the parameter .
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.7.1.19
Rev.1
#SHFSD – Set Handsfree side tone
#SHFSD – set handsfree side tone
Execute command
Read command
AT#SHFSD?
Return the current status in the format:
#SHFSD: 
Write command
AT#SHFSD = 
Set the sidetone on handsfree audio output.
Parameter
:
0 - disabled - headset mode (default)
1 - enabled - handsfree mode
2…255 reserved
Note: This setting returns to default after power off.
Test command
AT#SHFSD=?
Returns the supported range of values of the parameter .
Example
Reference
SW release
2.7.1.20
Telit GM862-PCS AT Command Specification
Version A
#/ – Repeat last command
#/ – Repeat last command
Execute command
It is used to execute again the last received command.
AT#/
Note: This command replaces the A/ command
Read command
Write command
Test command
Example
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.7.1.21
#BND – Select Band (DCS 1800 or PCS 1900)
#BND – Select Band (DCS1800 or PCS1900)
Execute command
Read command
AT#BND?
Write command
AT#BND = 
Return the current band selected in the format:
#BND: 
Set the band parameter to the Band value.
Parameter
:
0 - DCS 1800MHz
1 - PCS 1900MHz
Note: This setting is maintained even after power off.
Test command
AT#BND=?
Example
Returns the supported range of values of the parameter .
Reference
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.8 FAX Class 1 Commands
2.8.1 General configuration
2.8.1.1 +FCLASS - select active service class
+FCLASS - select active service class
Execute command
Read command
AT+FCLASS?
Write command
AT+FCLASS= 
Returns the current configuration value of the parameter .
Set the GM862-PCS in specified connection mode (data, fax, voice), hence
all the calls done after, will be data or voice.
Parameter:
: 0 = data
: 1 = fax class 1
: 8 = voice
Test command
AT+FCLASS=?
Returns all supported values of the parameters .
Example
Reference
ITU T.31 and TIA/EIA-578-A specifications / GSM 07.07
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Tri Band GPRS Data Terminal System
2.8.1.2 +FMI – Report manufacturer ID
+FMI – Report manufacturer ID
Execute command
Read command
AT+FMI?
Reports the manufacturer ID
Write command
Test command
Example
AT+FMI?
Telit Mobile Terminals
OK
Reference
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ITU T.31 and TIA/EIA-578-A specifications
Version A
2.8.1.3 +FMM? – Report model ID
+FMM – Report model ID
Execute command
Read command
AT+FMM?
Write command
Test command
Example
Reference
SW release
Reports the model ID
AT+FMM?
GM862-PCS - GSM900/1800 voice/data/fax module
OK
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Tri Band GPRS Data Terminal System
Rev.1
2.8.1.4 +FMR – Report revision ID
+FMR – Report revision ID
Execute command
Read command
AT+FMR?
Reports the software revision ID
Write command
Test command
Example
AT+FMR?
1.01.000 CS988
OK
Reference
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ITU T.31 and TIA/EIA-578-A specifications
Version A
2.8.2 Transmission/Reception control
2.8.2.1 +FTS – Stop Transmission and pause
+FTS – Stop transmission and pause
Execute command
Read command
Write command
AT+FTS=
This command causes the modem to terminate a transmission and wait
for  10 ms intervals before responding with the OK result code.
Parameter 
0-255 : length of time in 10ms intervals of the pause
Test command
AT+FTS=?
Example
Returns all supported values of the parameters .
Reference
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Version A
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.8.2.2 +FRS – Wait for receive silence
+FRS – Wait for receive silence
Execute command
Read command
Write command
AT+FRS=
this command causes the modem to listen and report an OK result code
when silence has been detected for the specified period of time.
This command when the required silence period is detected or when
the DTE sends another character other than XON or XOFF.
Parameter 
0-255 : length of time in 10ms intervals of the pause
Test command
AT+FTS=?
Example
Returns all supported values of the parameters .
Reference
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ITU T.31 and TIA/EIA-578-A specifications
Version A
2.8.2.3 +FTM – Transmit data modulation
+FTM – Transmit data
Execute command
Read command
Write command
AT+FTM=
Test command
AT+FTM=?
Example
Reference
SW release
this command causes the module to transmit facsimile data using the
modulation defined by the parameter .
parameter  : carrier modulation
24 - V27ter/2400 bps
48 - V27ter/4800 bps
72 - V29/7200 bps
96 - V29/9600 bps
Returns all supported values of the parameters .
ITU T.31 and TIA/EIA-578-A specifications
Version A
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Tri Band GPRS Data Terminal System
Rev.1
2.8.2.4 +FRM – Receive data modulation
+FRM – Receive data modulation
Execute command
Read command
Write command
AT+FRM=
this command causes the module to receive facsimile data using the
modulation defined by the parameter .
parameter  : carrier modulation
24 - V27ter/2400 bps
48 - V27ter/4800 bps
72 - V29/7200 bps
96 - V29/9600 bps
Test command
AT+FRM=?
Returns all supported values of the parameters .
Example
Reference
ITU T.31 and TIA/EIA-578-A specifications
SW release
Version A
2.8.2.5 +FTH – Transmit data with HDLC framing
+FTH – Transmit data with HDLC framing
Execute command
Read command
Write command
AT+FTH=
this command causes the module to transmit facsimile data using
HDLC protocol and the modulation defined by the parameter .
parameter  : carrier modulation
3 - V21/300 bps
Test command
AT+FTH=?
Example
Returns all supported values of the parameters .
Reference
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Version A
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.8.2.6 +FRH – Receive data with HDLC framing
+FRH – Receive data data with HDLC framing
Execute command
Read command
Write command
AT+FRH=
this command causes the module to receive facsimile data using HDLC
protocol and the modulation defined by the parameter .
parameter  : carrier modulation
3 - V21/300 bps
Test command
AT+FRH=?
Example
Returns all supported values of the parameters .
Reference
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ITU T.31 and TIA/EIA-578-A specifications
Version A
2.8.3 Serial port control
2.8.3.1 +FLO – Select flow control specified by type
+FLO – Select flow control specified by type
Execute command
Read command
Write command
AT+FLO=
Selects the flow control behavior of the serial port in both directions:
from DTE to DTA and from DTA to DTE
Parameter:
 - 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 command
AT+FLO=?
Returns all supported values of the parameters .
Example
Reference
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Tri Band GPRS Data Terminal System
Rev.1
2.8.3.2 +FPR – Select serial port rate
+FPR – Select serial port rate
Execute command
Read command
Write command
AT+FPR=
Test command
AT+FPR=?
Example
Reference
SW release
Selects the the serial port speed in both directions: from DTE to DTA
and from DTA to DTE. When autobauding is selected, then the speed
is detected automatically.
Parameter:
 - serial port speed selection
0 - autobauding
Returns all supported values of the parameters .
ITU T.31 and TIA/EIA-578-A specifications
Version A
2.8.3.3 +FDD – Double escape character replacement control
+FDD – Double escape character replacement control
Execute command
Read command
Write command
AT+FDD=
This command sets the double escape character replacement behavior
of the module depending on the parameter .
Parameter
= 0
DCE decode of _{:  or discard
DCE encode of <1/0><1/0>: 
Test command
AT+FDD=?
Example
Returns all supported values of the parameters .
Reference
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.9 Easy GPRS Extension
2.9.1 Overview
The Easy GPRS feature applies only to the Telit GM862-PCS and allows a Telit GM862-PCS user
to contact a device in internet and establish with it a raw data flow over the GPRS and Internet
networks.
This feature can be seen as a way to obtain a "virtual" serial connection between the Application
Software 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:
Controller
Device
Telit
GM862-GPRS
Local
Application
Remote
Device
(Internet)
networks
Remote
Application
<<<---------------------------------- Virtual Serial link ---------------------------------->>>
TCP/UDP
EASY
GPRS
EASY
GPRS
TCP/UDP
IP
Serial
Line
Driver
Data
on
Board
V.24
V.24
Terminal
Equipment
IP
IP
IP
L2
L2
L1
L1
network interworking
Mobile Terminal
GPRS Network and Internet
Remote
Device
(Internet)
This particular implementation allows to the devices interfacing to the Telit GM862-PCS module
the use of the GPRS and Internet packet service without the need to have an internal TCP/IP stack
since this function is embedded inside the module.
2.9.2 Easy GPRS definition
The Easy GPRS feature provides a way to replace the need of an Internet TCP/IP stack at the
terminal equipment side. The steps that will be required to obtain a virtual serial connection (that is
actually a socket) to the Internet peer are:
a)
b)
c)
d)
e)
f)
configuring the GPRS Access
configuring the embedded TCP/IP stack behaviour
defining the Internet Peer to be contacted
request the GPRS and socket connections to be opened (host is connected)
exchange raw data
close the socket and GPRS context
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Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
All these steps are achieved through AT commands.
As for common modem interface, two logical status are involved: command mode and data traffic
mode.
- In Command Mode (CM), some AT commands are provided to configure the Data Module
Internet stack and to start up the data traffic.
- In data traffic mode (Socket Mode, SKTM), the client can send/receive a raw data stream which
will be encapsulated in the previously configured TCP / IP packets which will be sent to the
other side of the network and viceversa. Control plane of ongoing socket connection is
deployed internally to the module.
2.9.2.1 Configuring the GPRS access
The 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 stack
The 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 contacted
As 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 is
given to the set command, then the module stores it as a host nick name. It is care of the module
user 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 the
AT#SKTOP command, the module will autonomously activate a GPRS connection and query its
DNS to obtain the IP address relative to the host nick name provided. This process of context
activation and DNS query may require a bit more time and requires that the GPRS network
coverage is good enough to permit data transfers.
2.9.2.4 Open the connection with the internet host
With 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 170 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
GM862-PCS establishes a TCP/UDP (depending on the parameter request) connection with the
given internet host
Once the connection is up the module reports the code: CONNECT
From this moment the data incoming in the serial port is packet and sent to the Internet host, while
the data received from the host is serialised and flushed to the Terminal Equipment.
2.9.2.5 Close the Socket and deactivate the context
The connection can be closed because of:
- remote host TCP connection close
- socket inactivity timeout
- Terminal Equipment by issuing the escape sequence "+++"
- Network deactivation
Note: if in the raw data to be sent there's an escape sequence, then the TE must work it out and sent
it 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 the
GPRS context returning to command mode and issuing the NO CARRIER code.
2.9.3 Known limitations
The 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.24
implementation: RTS, CTS and, highly recommended, DCD lines; this because software flow
control is not applicable to the feature;
Only Mobile initiated connections can be made, it is not possible to receive incoming TCP
connection requests;
Due to the particularity of this feature, the flow control of both the directions uplink and
downlink is interlocked
Page 171 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.9.4 Easy GPRS custom AT command Definition
2.9.4.1 #USERID – Authentication User ID control
#USERID – Authentication User ID control
Execute command
Read command
AT#USERID?
Write command
AT#USERID=""
Test command
AT#USERID=?
Example
Reports the current value of the parameter .
This command sets the user identification string to be used during the
authentication step to be the string .
Parameter:
 - authentication User ID
- any string value up to max length reported in the Test command.
Reference
Returns the maximum allowed length of the string parameter .
AT#USERID = "myName"
OK
AT#USERID?
#USERID: "myName"
OK
Telit specifications
SW release
Version C
Page 172 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.9.4.2 #PASSW – Authentication Password control
#PASSW – Authentication Password control
Execute command
Read command
AT#PASSW=?
Write command
AT#PASSW=""
Reports the maximum password length.
This command sets the user password string to be used during the
authentication step to be the string .
Parameter:
 - authentication password
- any string value up to max length reported in the Test command.
Test command
Example
No test command allowed, for password security
AT#PASSW = "myPassword"
OK
Reference
Telit specifications
SW release
Version C
Page 173 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.9.4.3 #PKTSZ –Packet Size control
#PKTSZ –Packet Size control
Execute command
Read command
AT#PKTSZ?
Write command
AT#PKTSZ=
Test command
AT#PKTSZ=?
Example
Reference
SW release
Reports the current value of the parameter .
This command sets the default packet size to be used by the
TCP/UDP/IP stack for data sending.
Parameter:
 - packet size in bytes
0 - automatically chosen by the device
1…512 - packet size in bytes
Returns the allowed values for the parameter .
AT#PKTSZ = 100
OK
AT#PKTSZ?
#PKTSZ: 100
OK
Telit specifications
Version C
Page 174 of 187
Rev.1
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.9.4.4 #DSTO – Data Sending Timeout control
#DSTO –Data Sending Timeout control
Execute command
Read command
AT#DSTO?
Write command
AT#DSTO=
Test command
AT#DSTO=?
Example
NOTE
Reports the current value of the parameter .
This timeout applies when the data to be sent is less that one full packet
size and whose sending would have been delayed for a undefined time
until new data to be sent is received and the full packet size is reached.
This command sets the maximum time that the module awaits before
sending anyway a packet whose size is less than the default one.
Parameter:
 - packet sending timeout in 100ms units
0 - no timeout, wait forever for packets to be completed before send.
1…255 hundreds of ms
Returns the allowed values for the parameter .
AT#DSTO = 10
( 1 sec. Timeout )
OK
AT#DSTO?
#DSTO: 10
OK
Reference
In order to avoid possible low performances issues, it is suggested to
set the  parameter to a value greater than 5
Telit specifications
SW release
Version C
Page 175 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.9.4.5 #SKTTO – Socket inactivity timeout control
#SKTTO – Socket inactivity timeout control
Execute command
Read command
AT#SKTTO?
Write command
AT#SKTTO=
Test command
AT#SKTTO=?
Example
Reference
SW release
Reports the current value of the parameter .
This timeout applies when the no data is exchanged in the socket for a
long time and therefore the socket connection is automatically closed
and the GPRS context deactivated.
This command sets the maximum time that the module awaits without
data exchange on the socket before closing the socket and deactivating
the GPRS context.
Parameter:
 - socket inactivity timeout in seconds units
0 - no timeout.
1…65535 s
Returns the allowed values for the parameter .
AT#SKTTO = 30
OK
AT#SKTTO?
#SKTTO: 30
OK
Telit specifications
Version C
( 30 sec. Timeout )
Page 176 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.9.4.6 #SKTSET – Socket definition control
#SKTSET – Socket definition control
Execute command
Read command
AT#SKTSET?
Write command
AT#SKTSET=, ,
""
Reports the current value of the parameters
,, .
This command sets the socket parameters values.
Parameter:
 - socket protocol type
0 - TCP
1 - UDP
 - remote host port to be opened
0…65535 - port number
 - address of the remote host
this parameter can be either:
- any valid IP address in the format: xxx.xxx.xxx.xxx
Test command
AT#SKTSET=?
Example
any host name to be solved with a DNS query in the format: 
Returns the allowed values for the parameters.
AT#SKTSET = 0,1024,"123.124.020.007"
OK
Or
AT#SKTSET=0,1024,"www.telit.net"
OK
NOTE
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 connection
Reference
SW release
Telit specifications
Version C
Page 177 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.9.4.7 #SKTOP – Socket Open command
#SKTOP – Socket Open Command
Execute command
AT#SKTOP
Activates the context number 1, proceeds with the authentication with
the user ID and password previously set with #USERID #PASSW
commands, and opens a socket connection with the host specified in
the #SKTSET command. Eventually before opening the socket
connection it issues automatically a DNS query to solve the IP address
of the host name.
If the connection succeeds a CONNECT indication is sent, otherwise a
NO CARRIER indication is sent.
Read command
Write command
Test command
Example
Reference
SW release
AT#SKTOP
… GPRS context activation, authentication and socket open…
CONNECT
Telit specifications
Version C
2.9.4.8 #QDNS – Query DNS
#QDNS – Query DNS
Execute command
AT#QDNS=""
This command activates a context, authenticates and proceeds to
execute 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 in
the result code:
#QDNS:"",< IP address>
the  is in the format: xxx.xxx.xxx.xxx
else
#QDNS:"", NOT SOLVED
Read command
Write command
Test command
NOTE
Reference
SW release
This command requires that the first context parameters, the
authentication par. are correctly set and that the GPRS network is
present.
Telit specifications
Version C
Page 178 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
2.9.4.9 #SKTSAV – Socket Parameters Save Command
#SKTSAV – Socket Parameters Save Command
Execute command
AT#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 address
Read command
Write command
Test command
Example
AT#SKTSAV
OK
…socket parameters have been saved in NVM
Note
Reference
If some parameters have not been previously specified then a default
value will be taken.
Telit specifications
SW release
Version C
Page 179 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.9.4.10
Rev.1
#SKTRST – Socket Parameters Reset Command
#SKTRST – Socket Parameters Reset Command
Execute command
AT#SKTRST
Resets the actual Parameters of the Socket in the NVM of the device to
the 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 command
Write command
Test command
Example
Reference
SW release
AT#SKTRST
OK
…socket parameters have been reset
Telit specifications
Version C
Page 180 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.10
Easy Camera custom commands
2.10.1.1
#CAMON – Camera ON
#CAMON – Camera ON Command
Execute command
Turns ON the Camera.
AT#CAMON
Read command
Write command
Test command
Example
AT#CAMON
OK
… camera is now powered up.
Reference
SW release
Telit specifications
Version D
2.10.1.2
#CAMOFF – Camera OFF
#CAMOFF – Camera off Command
Execute command
Turns OFF the Camera.
AT#CAMOFF
Read command
Write command
Test command
Example
Reference
SW release
AT#CAMOFF
OK
… camera is now powered down.
Telit specifications
Version D
Page 181 of 187
Rev.1
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.10.1.3
Rev.1
#TPHOTO – Camera Take Photo
#TPHOTO – Camera Take Photo Command
Execute command
AT#TPHOTO
Commands the CAMERA to take the photo and stores it in the GM862
memory.
Read command
Write command
Test command
NOTE
The photo is kept in the GM862-PCS RAM memory, therefore after a
power off it is lost.
There's only 1 position for the photo, every photo will overwrite the
previous.
Reference
The photo is taken during IDLE time, if the mobile is busy on network
operations, (e.g. during a call) the photo cannot be taken.
AT#TPHOTO
OK
… the camera has taken the photo and it is now stored on the GM862
memory.
Telit specifications
SW release
Version D
Example
2.10.1.4
#RPHOTO – Camera Read Photo
#RPHOTO – Camera Read Photo Command
Execute command
AT#RPHOTO
After this command the GM862 starts to flush the photo in its memory
to the serial line, ending it with the Ok code..
Read command
Write command
Test command
NOTE
Example
Reference
SW release
The photo is flushed as hexadecimal characters in the format selected.
AT#RPHOTO
xxxxxxxxxxxx (binary digits of the JPEG image)
OK
… the photo has been flushed to the serial line.
Telit specifications
Version D
Page 182 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.10.1.5
Rev.1
#CSQUAL – Camera Select Quality of Photo
#CSQUAL - Camera Select Quality of Photo
Execute command
Read command
AT#CSQUAL?
Write command
AT#CSQUAL=
Test command
AT#CSQUAL=?
NOTE
Example
Reference
SW release
Reports the current value of the parameter 
This command sets the quality of the photo stored on the memory of
the GM862-PCS
Parameter:
 - 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) - default
Returns the allowed values for the parameters.
Increasing the photo quality increases its size.
AT#CSQUAL=2
OK
Telit specifications
Version D
Page 183 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
2.10.1.6
Rev.1
#CSMODE – Camera Select Operating MODE
#CSMODE - Camera Select Operating MODE
Execute command
Read command
AT#CSMODE?
Write command
AT#CSMODE=
Test command
AT#CSMODE=?
Example
Reports the current value of the parameter

This command sets the operating mode of the GM862-PCS camera
Parameter:
 - camera operating mode
0 - daylight (short exposure) - default
1 - nightlight (long exposure)
Reference
Returns the allowed values for the parameters.
AT#CSMODE=0
OK
Telit specifications
SW release
Version D
Page 184 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Rev.1
3 Conformity Assessment
The Telit GM862-PCS module is assessed to be conform to the R&TTE Directive as stand-alone
product, 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 EMC
¨
In order to satisfy the essential requisite of the R&TTE 99/5/EC directive, the GM862PCS module is
compliant 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 301 489-7
In this document and the Hardware User Guide, Software User Guide all the information you may
need for developing a product meeting the R&TTE Directive is included.
Furthermore the Telit GM862-PCS module is FCC Approved as module to be installed
in other devices. This device is to be used only for fixed and mobile applications. If
the final product after integration is intended for portable use, a new application and
FCC 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 15
To 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 20
cm from all the persons and must not be co-located or operating in conjunction with any other antenna
or transmitter.
The antenna(s) used for this module must not exceed 7 dBi for mobile and fixed or mobile operating
configurations.
- Users and installers must be provided with antenna installation instructions and transmitter operating
conditions for satisfying RF exposure compliance.
Manufacturers of mobile, fixed or portable devices incorporating this module are advised to clarify any
regulatory questions and to have their complete product tested and approved for FCC compliance.
Page 185 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
List of acronyms
ACM
Accumulated Call Meter
ASCII
AT
American Standard Code for Information Interchange
Attention commands
CB
CBS
CCM
Cell Broadcast
Cell Broadcasting Service
Call Control Meter
CLIP
CLIR
Calling Line Identification Presentation
Calling Line Identification Restriction
CMOS
CR
CSD
Complementary Metal-Oxide Semiconductor
Carriage Return
Circuit Switched Data
CTS
DAI
Clear To Send
Digital Audio Interface
DCD
DCE
DRX
Data Carrier Detected
Data Communications Equipment
Data Receive
DSR
DTA
Data Set Ready
Data Terminal Adaptor
DTE
DTMF
DTR
Data Terminal Equipment
Dual Tone Multi Frequency
Data Terminal Ready
EMC
ETSI
FTA
Electromagnetic Compatibility
European Telecommunications Equipment Institute
Full Type Approval (ETSI)
GPRS
GSM
General Radio Packet Service
Global System for Mobile communication
HF
IMEI
IMSI
Hands Free
International Mobile Equipment Identity
International Mobile Subscriber Identity
IRA
ITU
Internationale Reference Alphabet
International Telecommunications Union
IWF
LCD
Inter-Working Function
Liquid Crystal Display
Page 186 of 187
Rev.1
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
LED
Light Emitting Diode
LF
ME
Linefeed
Mobile Equipment
MMI
MO
MS
Man Machine Interface
Mobile Originated
Mobile Station
MT
OEM
Mobile Terminated
Other Equipment Manufacturer
PB
PDU
PH
Phone Book
Protocol Data Unit
Packet Handler
PIN
PLMN
Personal Identity Number
Public Land Mobile Network
PUCT
PUK
RACH
Price per Unit Currency Table
PIN Unblocking Code
Random Access Channel
RLP
RMS
Radio Link Protocol
Root Mean Square
RTS
RI
SCA
Ready To Send
Ring Indicator
Service Center Address
SIM
SMD
Subscriber Identity Module
Surface Mounted Device
SMS
SMSC
SS
Short Message Service
Short Message Service Center
Supplementary Service
TIA
UDUB
Telecommunications Industry Association
User Determined User Busy
USSD
Unstructured Supplementary Service Data
Page 187 of 187
Rev.1}

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Telit Communications S p A GM862P GSM Module User Manual o

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