Sony 6220512 Mobile Base Unit User Manual

Sony Mobile Communications Inc Mobile Base Unit

Contents

Technical Manual

Product Photo/Illustration GT47/GT48Technical Description
The information contained in this document is the proprietary information of Sony Ericsson Mobile Communications International.The contents are confidential and any disclosure to persons other than the officers, employees, agents or subcontractors of the owner or licensee of this document, without the prior written consent of SonyEricsson Mobile Communications International, is strictly prohibited. Further, no portion of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, without the prior written consent of Sony Ericsson Mobile Communications International, the copyright holder.First edition (June 2003)Sony Ericsson Mobile Communications International publishes this manual without making any warranty as to the content contained herein. Further Sony Ericsson Mobile Communications International reserves the right to make modifications, additions and deletions to this manual due to typographical errors, inaccurate information, or improvements to programs and/or equipment at any time and without notice. Such changes will, nevertheless be incorporated into new editions of this manual.All rights reserved.©Sony Ericsson Mobile Communications International, 2003Publication number: LZT 123 7607 R1BPrinted in UK
 LZT 123 7607 R1BContents1. Introduction .............................................................................................................. 41.1 Description ........................................................................................... 41.2 Highlights ........................................................................................... 41.3 Main Features and Services............................................................................... 51.4 Service and Support ......................................................................................... 91.5 Precautions ........................................................................................... 92. Mechanical Description.......................................................................................... 102.1 Overview ......................................................................................... 102.2 Physical Dimensions...................................................................................... 113. Electrical Description ............................................................................................. 123.1 Power Supply and Extended I/O Connector ................................................... 123.2 RS232 Serial and Extended I/O Interface ....................................................... 163.3 Audio Connector ......................................................................................... 223.4 Antenna Connector........................................................................................ 243.5 SIM Card Reader ......................................................................................... 253.6 Real Time Clock ......................................................................................... 253.7 Software Updates ......................................................................................... 264. Embedded Applications ......................................................................................... 274.1 Features ......................................................................................... 274.2 Implementation ......................................................................................... 275. TCP/IP Stack........................................................................................................... 295.1 Implementation ......................................................................................... 296. Operation................................................................................................................. 306.1 Switching the GT47 On ................................................................................ 306.2 Switching the GT47 Off................................................................................ 306.3 Operating States/LED.................................................................................... 306.4 Power Save ......................................................................................... 316.5 Controller Mode ......................................................................................... 317. Technical Data ........................................................................................................ 328. AT Command Summary......................................................................................... 369. Abbreviations and Definitions............................................................................... 42
1. INTRODUCTION4 LZT 123 7607 R1B1. Introduction1.1 DescriptionThe GT47/GT48 is an intelligent GSM/GPRS control terminal that encapsulates everything you need for wireless M2M capability in one compact unit. In conjunction with Sony Ericsson’s M2mpower package the GT47/48 can host and control your wireless application, minimising the need for extra components. Alternatively, it can be used as a powerful standalone GPRS modem with its intrinsic TCP/IP stack.The GT47/48 is a self contained terminal with its own SIM card reader and standard connector interface, minimising the need for further hardware development.Its wide and useful range of IOs can be reconfigured to add functions and features that make your M2M solution both innovative and cost effective.The GT47/GT48 can be used to provide a communications link for a variety of wireless applications including fleet and asset management, vending, security and alarm monitoring, e-maintenance and other telemetry applications. The ease of application development and hosting on the GT47/48 means M2M solutions in area of personal leisure (e.g.boats and caravans) and around the home can be addressed.With dual band 900/1800 MHz (GT47) and 850/1900 MHz (GT48) versions available, your applications can be used all over the world. The control terminal comes with a library of sample script applications to give developers a head start where needed. The GT47/GT48 incorporates Sony Ericsson's GR47/GR48 GSM/GPRS engine.Note! When the GT47 is referred to in the text the description covers the GT48 as well; unless specifically mentioned. All functions described inside this Technical Description are only possible when the SIM-Card is inserted.1.2 Highlights• Intelligent, versatile GSM/GPRS control terminal• Dual band, EGSM 900/1800 MHz• Customised applications can be embedded and run independently• Self contained terminal with standard connectors• 2 x RS232 interfaces with a useful range of configurable IOs• TCP/IP stack• Data: GPRS, HSCSD, CSD, SMS• Voice: full rate, enhanced full rate, half rate
1. INTRODUCTION5 LZT 123 7607 R1B• SMS: mobile-originated, mobile-terminated, cell broadcast• Fax: Group 3, Classes 1 & 2• 15 way high density connector•5 V - 32 V d.c. input• 4-wire audio connection• Antenna connection (FME male)• R&TTE type approved (GT47)1.3 Main Features and ServicesThe GT47 performs a set of telecom services (TS) according to GSM standard phase 2+, ETSI and ITU-T. The services and functions of the GT47 are implemented by issuing customised applications embedded on the device, or by AT commands issued internally, or over the RS232 serial interface.1.3.1 Types of Mobile StationThe GT47 is a dual band control terminal with the GSM radio characteristics shown in the table below.GT47 E-GSM 900 GSM 1800Frequency Range (MHz) TX: 880-915RX: 925-960 TX: 1710-1785RX: 1805-1880Channel spacing 200 kHz 200 kHzNumber of channels 174 carriers *8 time slotsE-GSM: channels 0 to 124channels 975 to 1023374 carriers *8 time slotsDCS: channels 512 to 885Modulation GMSK GMSKTX phase accuracy < 5º RMS phase error (burst) < 5º RMS phase error (burst)Duplex spacing 45 MHz 95 MHzReceiver sensitivity at antenna connector < –102 dBm < –102 dBmTransmitter output power at antenna connector Class 4 2 W (33 dBm) Class 11 W (30 dBm)Automatic hand-over between EGSM 900 and GSM 1800
1. INTRODUCTION6 LZT 123 7607 R1B1.3.2 Short Message ServiceThe GT47 supports the following SMS services:• Sending; MO (mobile-originated) with both PDU (protocol data unit) and text mode supported.• Receiving; MT (mobile-terminated) with both PDU and text mode supported.• CBM (cell broadcast message); a service in which a message is sent to all subscribers located in one or more specific cells in the GSM network (for example, traffic reports). This feature is network dependent.• SMS STATUS REPORT according to GSM 03.40.• SMS COMMAND according to GSM 03.40.The maximum length of an SMS message is 160 characters when using 7-bit encoding. For 8-bit data, the maximum length is 140 characters. The GT47 supports up to 6 concatenated messages to extend this function.1.3.3 Voice ServicesThe GT47 offers the capability of mobile originated and mobile terminated voice calls, as well as supporting emergency calls. Multi-party, call waiting and call divert features are available. Some of these features are network-operator specific.For the inter-connection of audio, the GT47 offers a balanced 4-wire analogue interface.DTMF (Dual Tone Multi Frequency) is supported.The GT48 also supports the Adaptive Multi Rate (AMR) type of vocoder.GT48 GSM 850 GSM 1900Frequency Range (MHz) TX: 824-849RX: 869-894 TX: 1850-1910RX: 1930-1990Channel spacing 200 kHz 200 kHzNumber of channels 124 carriers *8 time slotsGSM: channels 128 to 251 299 carriers *8 time slotsPCS: channels 512 to 810Modulation GMSK GMSKTX Phase Accuracy < 5º RMS phase error (burst) < 5º RMS phase error (burst)Duplex spacing 45 MHz 80 MHzReceiver sensitivity at antenna connector < –102 dBm < –102 dBmTransmitter output power at antenna connector Class 42W (33 dBm) Class 11 W (30 dBm)Automatic hand-over between GSM 850 and GSM 1900
1. INTRODUCTION7 LZT 123 7607 R1B1.3.4 Data ServicesThe GT47 supports the following data protocols:•*356*HQHUDO3DFNHW5DGLR6HUYLFH GT47 is a Class B terminals, which provide simultaneous activation and attachment of GPRS and GSM services. GT47 is a GPRS class 8 (4+1) enabled devices, which are capable of transmitting in one timeslot per frame (up link), and receiving at a maximum of four timeslots per frame (down link).•&6'&LUFXLW6ZLWFKHG'DWD GT47 is a capable of establishing a CSD communication at 9.6 kbps.•+6&6'+LJK6SHHG&LUFXLW6ZLWFKHG'DWD GT47 supports HSCSD class 2 (2+1) communication, with one timeslot per frame capacity in the up link and two timeslots per frame capacity in the down link.1.3.5 Fax ServicesThe GT47 allows fax transmissions to be sent and received by commercial fax software installed on the application computer. Group 3 fax Classes 1 and 2 are supported.1.3.6 Supplementary Services• Call forwarding• Call hold, waiting and multiparty• Calling/called number identification• Advice of charge•USSD• Alternate line service• Customer service profile• Preferred networks• Operator selection• Network registration• Call barring• Call transfer1.3.7 Serial CommunicationThe GT47 enables an end-to-end communication path to be established between the telemetry/telematics application, either hosted internal or connected externally, and a remote terminal or host, via the GSM network.
1. INTRODUCTION8 LZT 123 7607 R1BOnce a path has been set up, voice or data communication can take place. An RS232 9-signal serial interface is available via the GT47’s 15-way high density data connector.This primary serial interface can be used to:1. Control the GT47 via an external PC or micro-controller using AT commands;2. Send and receive data. The GT47 supports the full set of AT commands according to GSM 07.05 and GSM 07.07. It also supports an extended set of Ericsson proprietary AT commands to add extra functionality.AT commands are used to operate the GT47 with a broad range of functions including:• configuring general parameters of the GT47• setting up and controlling communications to and from the GSM network• obtaining GSM network status informationAdditionally the GT47 provides a second RS232 serial interface, operating as a 4-signal and GND interface, with hardware flow control (Rx, Tx, CTS and RTS). This 4-signal serial interface is controllable via embedded applications and may be used to control external accessories e.g. a GPS receiver.For more detail on the AT commands supported by the GT47 see “AT Command Summary”, page 36.1.3.8 Extended I/O InterfaceThe control terminal contains several general purpose, configurable, input and output signals. Signals may be reconfigured by AT command or by intrinsic function when using embedded applications.• 1 analogue input• 3 digital inputs• 5 digital outputs• + 4.8V DC outputIn addition, 6 of the control signals on the primary RS232 interface can be reconfigured for use as digital inputs or outputs if required.The drivers controlling certain outputs have been designed to carry higher currents than normal logic IOs. They can be used to activate or power external devices, for example a switch or a relay.A+4.8V output is available, if required, to power external devices.
1. INTRODUCTION9 LZT 123 7607 R1B1.3.9 Interfacing with the GT47The GT47 uses the following industry standard connectors;• 15 pin high density socket (RS232 serial port and extended I/O interface)• RJ12 (plug-in power supply and extended I/O connector)• RJ9 (handset audio connector)• Integral SIM card reader• FME male (antenna connector)1.4 Service and SupportTo contact customer support please use the details below:Customer Support Sony Ericsson Mobile Communications Maplewood Building Chineham Business Park Basingstoke RG24 8YBE-mail: modules.support@sonyericsson.com or modules.info@sonyericsson.comInformation about Sony Ericsson and its products is available on the following web site:http://www.SonyEricsson.com/M2M1.5 PrecautionsThe GT47 as a standalone item is designed for indoor use only. To use outdoors it must be integrated into a weatherproof enclosure. Do not exceed the environmental and electrical limits as specified in “Technical Data”, page 32.
2. MECHANICAL DESCRIPTION10 LZT 123 7607 R1B2. Mechanical Description2.1 OverviewThe pictures below show the mechanical design of the module along with the positions of the different connectors and mounting holes. The module case is made of durable PC/ABS plastic. Figure 2.1 Module viewed from the left sideFigure 2.2 Module viewed from the right sideAntennaconnectorRS232 serial and extended I/O connectorLEDAccess to SIM cardMounting hole (x2)Audio connectorPower supply andextended I/O connector
2. MECHANICAL DESCRIPTION11 LZT 123 7607 R1B2.2 Physical DimensionsMeasurements are given in millimetres. See also “Technical Data”, page 32.71.566.477.426.211.055.345.310.611.09.051.0(x2)3.5
3. ELECTRICAL DESCRIPTION12 LZT 123 7607 R1B3. Electrical DescriptionAll electrical connections to the module are protected in compliance with the standard air (8 kV) and contact (4 kV) Electrostatic Discharge (ESD) tests, of EN 61000-4-2.The module uses the following industry standard connectors:• High density 15 pin (RS232 serial and extended I/O interface)• RJ12 6-way (power supply and extended I/O connector)• RJ9 4-way (handset connector)• SIM card reader• FME male coaxial jack (antenna connector)3.1 Power Supply and Extended I/O ConnectorAn RJ12 6-way connector, as shown and described below, serves as a means of supplying and controlling d.c. power to the modem. Additionally there are several extended input/output signals available that can be used to control or interface external systems and devices.General signal description: 1 VIN2 OUT-2 3 IN-1 4 TO_IN 5 OUT-1 6 GND
3. ELECTRICAL DESCRIPTION13 LZT 123 7607 R1BThe power connector electrical characteristics are listed below:Note! Signal OUT-2 on the RJ12 connector is switched in parallel to signal OUT-4 on the 15-pin high density socket. The individual output signals are generated by two different low side switches inside the module driven from a common control signal.3.1.1 Power Supply InterfaceThe supply voltage VIN, required by the GT47, is in the range 5V - 32V d.c. VIN and GND are reverse polarity and over voltage protected.The GT47 switches on automatically once the 5V-32V dc supply voltage is applied. Note! The GT47 will not switch on if TO_IN is shorted to ground when the dc supply is applied.Note! For more information on switching the GT47 on and off please see section “6. Operation”, page 30.Note! Please be aware that the total current carried via either the VIN or GND pins will be the sum of the intrinsic power consumption of the GT47 and any drive current supplied via OUT-1 or OUT-2 (or other IOs). The current on either of the VIN or GND pins must not exceed 1.5A.Caution! It is recommended that the system integrator provides appropriate fusing otherwise the GT47 may be damaged.Pin Signal Dir Limits Description1 VIN I5 - 32 V Positive power input2OUT-2 O32V, 0.25A Low side switch, short circuit protected3IN-1 I–0.5 - 32 V Digital Input VIH > 3V, VIL < 2.8 V Internal Pull Down of 40KΩ4TO_IN I–0.5 - 32 V Active low control line used to switch the GT47 off/on. VIH > 5 V, VIL < 2 V Power off/on: t > 0.2 s Internal Pull Up to VIN of 20KΩ5OUT-1 O VIN, 0.4A High side switch, short circuit protected6GND I - Negative power (ground) input and return path for TO_IN and the extended inputs and outputs
3. ELECTRICAL DESCRIPTION14 LZT 123 7607 R1BCurrent Consumption at Standard OperationNotes! Power Down Mode: DC power is applied but the GT47 is switched OFF. Standby Mode: The module is switched ON and camped on to the network. No call in progress. Talk Mode: The module is switched ON and a voice/data call is in progress. The power consumption during transmission in Talk Mode is measured at maximum transmitted power. The power consumption in Standby Mode is measured at the maximum paging rate (Paging Rate 2).Current Consumption with external +4.8V Supply ActiveFor the following calculations it was assumed that the external +4.8V load is 70mA.Note! These tables do not include the power consumption associated with any drive current supplied via further GT47 outputs, e.g. OUT-1 or OUT-2.Supply Voltage 5V 12V 32VPower Down Mode:AV Max AV Max AV Max515 515 20 50 mAStandby Mode (typical):Frequency AV Max AV Max AV Max850/900 MHz 26 110 943 620 mA1900/1800 MHz 26 120 945 619 mATalk Mode (typical):Frequency AV Max AV Max AV Max850/900 MHz 220 1230 90 520 40 200 mA1900/1800 MHz 170 960 70 350 30 140 mASupply Voltage 5V 12V 32VPower Down Mode:AV Max AV Max AV Max515 515 20 50 mAStandby Mode (typical):Frequency AV Max AV Max AV Max850/900 MHz 112 196 45 79 19 33 mA1900/1800 MHz 112 206 45 81 19 32 mATalk Mode (typical):Frequency AV Max AV Max AV Max850/900 MHz 306 1316 126 556 53 213 mA1900/1800 MHz 256 1046 106 386 43 153 mA
3. ELECTRICAL DESCRIPTION15 LZT 123 7607 R1B([WHQGHG,26LJQDOVDigital InputsThe digital input IN-1 is available on pin 3 of the RJ12 connector. Its state is detected by IO5 of the embedded GR47 engine, see GT47-GR47 signal cross reference table, page 21.The distinction between low level and high level signals is at the voltage level of 3 V. Voltages above 3 V are detected as high level voltages and voltages below 2.8 V are detected as low level.Digital OutputsThe RJ12 power supply connector has two different output drivers:• OUT-1 is driven by a high side switch that applies VIN to pin 5 of the RJ12 connector. IO1 of the embedded GR47 engine is used to activate the OUT-1 signal, see GT47-GR47 signal cross reference table, page 21.• OUT-2 is driven by a low side switch that shorts pin 2 of the RJ12 connector to ground when activated. IO3 of the embedded GR47 engine is used to activate OUT-2, see GT47-GR47 signal cross reference table, page 21.VIN MonitoringThe voltage, VIN, can be monitored internally by the GT47, for example if the control terminal is supplied from an external battery. ADC1 on the GR47 is used for this purpose, see GT47-GR47 signal cross reference table, and is calibrated to operate in the voltage range 0 – 31.875 V. The resolution of the 8 bit converter, ADC1, provides a measurement accuracy of approximately 3%.
3. ELECTRICAL DESCRIPTION16 LZT 123 7607 R1B3.2 RS232 Serial and Extended I/O InterfaceThe GT47 supports a standard 9 signal RS232 serial interface (EIA/TIA 574) on the 15 pin high density connector together with a range of configurabe I/Os including a second 4-wire RS232 interface. Signals that support an alternative configuration can be reconfigured using the appropriate AT command (e.g. AT+E2IO) or via an intrinsic function if using an embedded application.Note! When reconfiguring a GT47 signal, via AT command or intrinsic function, the corresponding GR47 signal name must be used, see GT47-GR47 signal cross reference table, page 21.The electrical characteristics of the serial port signals are shown below:1 DCD2 RD3 TD4 IN-35 OUT-36 DSR7 RTS8 CTS9 4.8V12367813 141010 RI11 IN-212 OUT-413 DTR14 GND15 ANA_IN45911 12 15Pin GT47 SignalDir Max. Voltage limitsDescription1DCD O±13.2V RS232 signal Data carrier detect V ≥ ±5V2RD O±13.2V RS232 signal:Received data V ≥ ±5V3TD I± 25V RS232 signal:Transmitted data V < 0.6V, V > 2.4V4IN-3 I-0.5 - 32V Digital input V > 3V, V < 2.8VPullDown with 40KΩ5OUT-3 O32V, 0.25A low side switch, short circuit protected6DSR O±13.2V RS232 signal:Data set ready V ≥ ±5V7RTS I±25V RS232 signal:Request to send V < 0.6V, V > 2.4V8CTS O±13.2V RS232 signal:Clear to send V ≥ ±5V
3. ELECTRICAL DESCRIPTION17 LZT 123 7607 R1B3.2.1 Standard RS232 Serial interface and SignalsThe module supports a standard RS232 serial interface (EIA/TIA 574) via its 15 pin high density connector, shown above. 3.2.2 Serial DataThe GT47 supports the standard data character format of 1 start bit, 8 bit data, no parity plus 1 stop bit, in total 10 bits per character. In line with serial communication terminology the module is the data circuit-terminating equipment (DCE) and the external application or computer is the data terminating equipment (DTE).3.2.3 Serial Data Signals - RD, TDThe default baud rate is 9.6 kbps, however higher bit rates up to 230.4 kbps are supported and can be set by AT commands. At start-up the module transmits and receives data at the default rate of 9.6 kbps in either standard AT mode or binary mode (the first received data - AT or binary format - determines the operating mode).6HULDO'DWD)URP*75' 3LQRD is an output signal that the GT47 uses to send data to the external application.6HULDO'DWD7R*77' 3LQTD is an input signal, used by the external application to send data to the GT47.94.8V O0 - +4.8V, 75mA Voltage supply for external devicesSupply voltage +4.8V, max. current 75mA10 RI O±13.2V RS232 signal:Ring indicator V ≥ ±5V11 IN-2 I-0.5 - 32V Digital input V > 3V, V < 2.8VPullDown with 40KΩ12 OUT-4 O32V, 0.25A low side switch, short circuit protected13 DTR I±25V RS232 signal:Data Terminal Ready V < 0.6V, V > 2.4V14 GND I - Ground connection and return path for the extended inputs/outputs15 ANA_IN I-0.5 - 32V Analog input measurement range: 0 - 12.75VPin GT47 SignalDir Max. Voltage limitsDescription
3. ELECTRICAL DESCRIPTION18 LZT 123 7607 R1B3.2.4 Control Signals - RTS, CTS, DTR, DSR, DCD, RIRTS and CTS are capable of transmitting at 1/10 th of the data transmission speed for data rates up to 230.4kbps (byte-oriented flow control mechanism).5HTXHVWWR6HQG576 3LQUsed to condition the GT47 for data transmission. The default level is inactive by internal pull down.The exact behaviour of RTS is defined by an AT command. Software or hardware control can be selected. Hardware flow is the default control.The application must pull RTS high to enable transmission from the GT47. &OHDU7R6HQG&76 3LQCTS indicates that the GT47 is ready to transmit data. The default level is high. You can define the exact behaviour of CTS through an AT command, and can select software or hardware flow control.'DWD7HUPLQDO5HDG\'75 3LQDTR indicates that the DTE is ready to send and receive data. It also acts as a hardware ‘hang-up’, terminating calls when switched low. The signal is active high. You can define the exact behaviour of DTR with an AT command.'DWD6HW5HDG\'65 3LQAn active DSR signal is sent from the GT47 to the application (DTE) to confirm that a communications path has been established. DSR has two modes of operation, use the AT command AT&S to set the mode.'DWD&DUULHU'HWHFW'&' 3LQDCD indicates that the GT47 is receiving a valid carrier (data signal) when high. You can define the exact behaviour of DCD with an AT command.5LQJ,QGLFDWRU5, 3LQRI indicates that a ringing signal is being received by the GT47 when high. You can define the exact behaviour or RI with an AT command.
3. ELECTRICAL DESCRIPTION19 LZT 123 7607 R1BAlternative ConfigurationIt is possible to reconfigure one or more of the signals in this section (RTS, CTS, DTR, DSR DCD and RI) to be used as digital inputs or outputs if the full RS232 serial interface is not required. Configuration is achieved using AT command (AT+E2IO) or via embedded application intrinsic functions, please refer to GT47-GR47 signal cross reference table, page 21. To be reconfigured as a digital IO, each signal must retain the direction and the logic voltage levels attributed to it when used as an RS232 signal. For example DSR can only be reconfigured as a digital output with V ≥ ±5V.3.2.5 Extended I/O SignalsPlease refer to GT47-GR47 signal cross reference table, page 21, for more information on the relationship between signal names and pin numbers of the GT47 and the embedded GR47 engine.'LJLWDO,QSXWV 3LQDigital inputs IN-2 and IN-3 are available on the HD15 connector via pins 11 and 4 respectively. The inputs are detected via signals IO4 and IO7 of the embedded GR47 engine.Note! As an alternative configuration signals IN-2 and IN-3 can be used to support a second RS232 serial interface as RTS-2 and TD-2. Further information is given below.$QDORJ,QSXW 3LQThe signal ANA_IN can be used for measuring analog input values in the range 0 -12.75V. ADC2 of the embedded GR47 is used to detect ANA_IN.The resolution of the converter is 8 bit with an measurement accuracy of about 3%.The input impedance of the ANA_IN pin is 50 KΩ.'LJLWDO2XWSXWV 3LQDigital outputs OUT-3 and OUT-4 are available on the HD15 connector via pins 5 and 12 respectively. The outputs are controlled via signals IO8 and IO3 of the embedded GR47 engine.Signal OUT-4 on the HD15 connector is switched in parallel to signal OUT-2 on the RJ12 connector. The individual output signals are generated by two different low side switches inside the terminal driven from the common control signal, IO3. All GT47 output signals driven by
3. ELECTRICAL DESCRIPTION20 LZT 123 7607 R1Blow side switches return to open circuit when deactivated. This allows the external application hardware to determine the desired logic voltage levels with the appropriate pull-up.The output drivers are low side switches which short the pin to GND if they are activated.Note! As an alternative configuration signals OUT-3 and OUT-4 can be used to support a second RS232 serial interface as CTS-2 and RD-2. Further information is given below.92XWSXW6XSSO\ 3LQThere is a voltage regulator implemented inside the module that is capable of supplying an external voltage source of +4.8V with a maximum current of 75 mA.The voltage source can be switched on/off with the DAC signal of the internal GR47 GSM engine.By default the voltage source is switched on. A high level of 2.75V at the DAC output of the GR47 GSM engine will switch the voltage source off.Note! The +4.8V source may be switched on/off via an embedded or external application and so may be used as an optional digital output with levels of +4.8V and open circuit.3.2.6 Second RS232 Serial InterfaceIN-3 and OUT-3 can be automatically reconfigured as signals TD-2 and RD-2, of a second serial interface, by enabling UART3 of the internal GR47. UART 3 may be enabled using AT command or intrinsic function.In addition, IN-2 and OUT-4 can be automatically reconfigured as signals CTS-2 and RTS-2 of the second serial interface by enabling hardware flow control for UART3 on the internal GR47. Hardware flow control can be enabled using intrinsic function only.Note! The signal level thresholds for each of the digital inputs of the second serial interface are: 3V<V <32V and V < 2.8V.An external RS232 transceiver component may be used to convert the serial interface to standard RS232 electrical levels. The GT47’s +4.8 V output can be used to provide power for the transceiver. 3.2.7 Relationship between GT47 and GR47 signalsWhen reconfiguring a GT47 signal, via AT command or intrinsic function, the corresponding GR47 signal name must be used, see the GT47-GR47 signal cross reference tables overleaf.
3. ELECTRICAL DESCRIPTION21 LZT 123 7607 R1BGT47 - GR47 Signal Cross-reference Table A† IO3 on the embedded GR47 provides the common control signal for both GT47 signals OUT-2 and OUT-4.GT47 / GT48 Relationship to the GR47/GR48 engineGT47 PinGT47 Primary Signal Dir. GR47 PinCorresponding GR47 SignalHD15 Connector1DCD O38 DCD2RD I42 RD3TD O41 TD4IN-3 I43 IO75OUT-3 O44 IO86DSR O32 DSR7RTS I39 RTS8CTS O40 CTS9+4.8V O20 DAC10 RI O36 RI11 IN-2 I24 IO412 OUT-4 O23 IO3†13 DTR I37 DTR14 GND15 ANA_IN I27 ADC2RJ12 Connector1 VIN2OUT-2 O23 IO3†3IN-1 I13 I054TO_IN5OUT-1 O21 IO16GNDGT47 Internal FunctionVIN Monitoring I26 ADC1Power Save Mode O22 IO2
3. ELECTRICAL DESCRIPTION22 LZT 123 7607 R1BGT47-GR47 Signal Cross-reference Table B3.3 Audio ConnectorA 4-way RJ9 connector, as shown below, allows a telephone handset to be plugged into the GT47, giving access to the microphone and earpiece signals. The connector may also be used to drive other analogue audio sub-systems or devices.The module is configured to work with a range of handsets. If necessary, changes can be made to the characteristics of the audio interface by sending the GT47 appropriate AT commands.GT47 / GT48 Relationship to GR47/GR48 engineGT47 PinGT Alternative signal Dir. Pin Corresponding GR47 SignalHD15 Connector1OUT-6 O38 O12 I 423 O 414TD-2 I43 TD35RD-2 O44 RD36OUT-7 O32 O37IN-4 I39 IO98OUT-8 O40 O49OUT-5 O20 DAC10 OUT-9 O36 O211 RTS-2 I24 IO412 CTS-2 O23 IO313 IN-5 I37 IN11415
3. ELECTRICAL DESCRIPTION23 LZT 123 7607 R1BAudio signal descriptions are listed below:MICP and MICN are balanced differential microphone input signals. These inputs are compatible with an electret microphone.BEARP and BEARN are the speaker output signals. These are differential-mode outputs. The electrical characteristics are given in the table below.The following table shows the ear piece impedances that can be connected to BEARP and BEARN.Pin Signal Dir Description1MICN IMicrophone negative input2BEARN OEarpiece negative output3BEARP OEarpiece positive output4MICP IMicrophone positive inputParameter LimitOutput level (differential) ≥ 4.0 VOutput level (dynamic load = 32 Ω)≥ 2.8 VDistortion at 1 kHz and maximum output level ≤ 5 %Offset, BEARP to BEARN ± 30 mVEar piece mute switch attenuation ≥ 40 dBEar piece model Impedance ToleranceDynamic ear piece [32 Ω + 800 µH] // 100 pF ± 20 %Dynamic ear piece [150 Ω + 800 µH] // 100 pF ± 20 %Piezo ear piece 1 kΩ + 60 nF ± 20 %
3. ELECTRICAL DESCRIPTION24 LZT 123 7607 R1B3.4 Antenna ConnectorThe antenna connector allows transmission of radio frequency (RF) signals between the GT47 and an external customer-supplied antenna. The module is fitted with a 50 Ω, FME male coaxial jack as shown below.The table below shows the antenna electrical characteristics:Parameter Limit DescriptionNominal impedance 50 Ω (SWR better than 2.5:1)Output Power 2 Watt peak (Class 4) EGSM 850/ 9001 Watt peak (Class 1) GSM 1800/1900Static Sensitivity Better than –102 dBm EGSM 850/ 900Better than –102 dBm GSM 1800/1900RF SignalGND
3. ELECTRICAL DESCRIPTION25 LZT 123 7607 R1B3.5 SIM Card ReaderThe module is fitted with a SIM card reader designed for 3 V and 5 V SIM cards. It is the flip-up type which is lockable in the horizontal position and is accessed through a removable panel as shown below.The SIM card reader incorporates a SIM presence switch which detects whether a SIM card is inserted. The full operation of the GT47 relies on a SIM card being inserted.Caution! Some GT47 functionality may be lost if you try to operate the control terminal without a SIM card.The SIM presence switch also ensures that when a SIM card is inserted or removed the unit is reset, as long as the GT47 is switched ON.3.6 Real Time ClockThe module contains a real time clock (RTC) to maintain accurate timekeeping and to enable “timestamping” of messages.The RTC is powered all the time that the GT47 is turned on. When the GT47 is powered off, a storage energy device within the module provides back-up power to maintain the RTC for several hours - please contact Sony Ericsson Customer Support for more information.
3. ELECTRICAL DESCRIPTION26 LZT 123 7607 R1B3.7 Software UpdatesIt is possible, and sometimes necessary, to update the module software. Updates must be carried out by a Sony Ericsson approved technician. Please contact your supplier for details (see “Service and Support”, page 9).
4. EMBEDDED APPLICATIONS27 LZT 123 7607 R1B4. Embedded ApplicationsThe module has the capability to store and run customer written code in the form of a script during the processors idle time, through the use of an on board interpreter.4.1 FeaturesMain features of embedded applications are as follows.• C based scripting language (Sony Ericsson specific)• Over the air upgrade of scripts (NOT GSM software)• Library of intrinsic functions• Multiple on radio device script support4.2 ImplementationThe module has up to 44kbytes of space available for storage of two scripts in the scripting language and 25kbytes of operating RAM. Structures included in this language are:• If - then - else statements• While loops• For loopsAll hardware interfaces that are normally available to the module through the AT commands are available to the embedded application. Further drivers have been written such as M bus and I2C for use by the embedded application (EA) through the use of the I/O pins.4.2.1 LimitationsSince the module is processing the script using its own memory, limitations are placed onto the scripts that are run.• A direct comparison cannot be made to a fully compiled C program in terms of size but a gauge of script size is that if each line were 128 characters long in the script then the script could be 350 lines long. • Processing power is something that needs to be considered as the script is run as a low priority process within the software. However, controller mode stops GSM operation and provides all the processing power for the script to be run. See the Application Guide for more details.• Code cannot be ported directly from an existing application and loaded directly onto the radio device. It must be re written in the Sony Ericsson Mobile script language so that the radio device interpreter can function correctly.
4. EMBEDDED APPLICATIONS28 LZT 123 7607 R1B4.2.2 M2mpower IDE (Integrated Developers Environment)The IDE is a windows based package which allows the user to write, simulate, debug and download the application into a radio device with the embedded application (EA) software. The standard version is designed to run on Windows XP and 2000, other versions are available for 98 if required.A guide is available for implementing applications using the developers kit and the embedded application (EA) functionality.This is a required package to be able to implement an embedded application (EA).For further information please contact SEM customer support.
5. TCP/IP STACK29 LZT 123 7607 R1B5. TCP/IP StackAn on board IP/TCP/UDP stack has been integrated into the software negating the need for the customer to implement one in their own code base.For early software releases this is only accessible through the embedded applications (see previous section) using intrinsic functions.5.1 ImplementationThe following types of commands allow various functions:• Open/closing IP connection - Negotiates/closes a dynamic IP address with the web server.• Send/Receive TCP packets - Performs all TCP operations to send and receive packets.• Send/Receive UDP packets - Performs all UDP operations to send and receive packets.• Resolve URL to an IP address - Similar to nslookup command in DOSWhen the unit is set up and controlled using the embedded applications either the embedded applications or an external application can generate data to be sent and pass it to the radio device for transmission.This effectively provides a transparent communication link to an internet server from the application over GPRS.
6. OPERATION30 LZT 123 7607 R1B6. Operation6.1 Switching the GT47 OnThe GT47 is turned ON automatically once DC power is applied. If the GT47 is turned OFF, using one of the methods described in 6.2, the control terminal can be turned ON again through one of two methods:• pull signal TO_IN to ground for t >0.2s, then release. • activate the main RS232 control line DTR, low to high for >0.2s The GT47 is fully operational after 4 seconds. Logging onto a network may take longer than this and is outside the control of the GT47.Note! The GT47 will not switch on if TO_IN is shorted to ground when the dc supply is applied.6.2 Switching the GT47 OffThere are two ways to switch off the GT47 as described below.• Use the appropriate AT command (AT+CFUN);• pull signal TO_IN to ground for t >0.2s, then release.6.3 Operating States/LEDThe GT47 has a green LED, as depicted below, which is used to indicate various operating states. These states are described in following table.Operating state LEDAfter switching on the GT47 On after 4 sGT47 switched off or power removed from the module OffStandby or talk FlashingNo network, network search, no SIM card, no PIN entered OnLED
6. OPERATION31 LZT 123 7607 R1B6.4 Power Save The GT47 can power down the main RS232 IC when not needed in order to minimise power consumption. The IC is powered up automatically at start-up but can be powered down by setting the output of IO2 on the embedded GR47 (pin22) to low via AT command or embedded application. Once powered down, the IC can be woken up by setting the output of IO2 high on the GR47 via AT Command. Even when powered down the IC is able to pass a DTR signal received on the serial interface. Therefore an embedded application that monitors DTR, while the IC is powered down, can be made to wake up the IC, if a signal is received, by setting IO2 on the GR47 high.6.5 Controller ModeThe GT47, when powered up, will normally start up its GSM signalling software and look to register on the GSM network. Any embedded application script runs as a background process as and when the GSM software is idle. As a feature available via embedded applications the GT47 can be placed in ‘controller mode’ whereby the GT47 powers up with a minimal subset of radio functionality. The GSM signalling software is halted and the embedded applications script has full control of the processor.Controller mode allows an application to run with more predictable response times.
7. TECHNICAL DATA32 LZT 123 7607 R1B7. Technical Data'DWD)HDWXUHV6KRUW0HVVDJH6HUYLFH)HDWXUHV9RLFH)HDWXUHV)D[)HDWXUHVCSD Up to 9.6 kbps, transparent and non-transparentHSCSD (2+1) Up to 28.8 kbps GPRS Class B (4+1) - P channels - Coding schemes CS1 - CS485.6 kbps (subject to network support and terminal location)GSM 07.10 multiplexing protocolSMSText and PDUPoint to point (MT/MO)Cell broadcastconcatenation of up to 6 SMSFull Rate, Enhanced Full Rate and Half Rate (FR/EFR/HR)Echo Cancellation and Noise ReductionDual Tone Multi Frequency (DTMF)Group 3Class 1 and 2
7. TECHNICAL DATA33 LZT 123 7607 R1B'DWD6WRUDJH3RZHU6XSSO\5DGLR6SHFLILFDWLRQV$XGLR6SHFLILFDWLRQVSMS storage capacity 40 in the module In addition, the unit can handle as many SMS as the SIM can storePhone book capacity 100Supply voltage range 5 - 32 V d.c.Frequency range GT47: EGSM 900 MHz and 1800 MHz (dual band)Maximum RF output power 2 W (900 MHz) and 1 W (1800 MHz)Antenna impedance 50 Ω Static sensitivity Better than –102 dBmParameter LimitOutput level (differential) ≥ 4.0 VOutput level (dynamic load = 32 Ω)≥ 2.8 VDistortion at 1 kHz and maximum output level ≤ 5 %Offset, BEARP to BEARN ± 30 mVEar-piece mute-switch attenuation ≥ 40 dBEar piece model Impedance ToleranceDynamic ear piece [32 Ω + 800 µH] // 100 pF ± 20 %Dynamic ear piece [150 Ω + 800 µH] // 100 pF ± 20 %Piezo ear piece 1 kΩ + 60 nF ± 20 %
7. TECHNICAL DATA34 LZT 123 7607 R1B6,0&DUG5HDGHU(OHFWULFDO&RQQHFWRUVDQG/('0HFKDQLFDO6SHFLILFDWLRQVoltage type Support for 3 V and 5 V SIM cardsPlug-in power supply connector and extended I/O RJ12 6-wayHandset audio connector RJ9 4-wayAntenna connector FME maleRS232 port high density socket, 15 pinLED GreenLength 77.4 mmWidth 66.4 mmHeight 26.2 mmWeight < 110 g
7. TECHNICAL DATA35 LZT 123 7607 R1B(QYLURQPHQWDOVSHFLILFDWLRQV&HUWLILFDWLRQOperating temperature range –30 °C to +75 °CStorage temperature range –40 °C to +85 °CRelative humidity 5 - 95 %, non-condensingStationary vibration, sinusoidal Displacement: 7.5 mmAcceleration amplitude: 20 m/s² and 40 m/s²Frequency range: 2-8 Hz, 8-200 Hz, 200-500 HzStationary vibration, random Acceleration spectral density (m²/s²): 0.96, 2.88, 0.96Frequency range: 5-10 Hz, 10-200 Hz, 200-500 Hz, 60 min/axisNon-stationary vibration, including shock Shock response spectrum I, peak acceleration: 3 shocks in each axis and direction; 300 m/s², 11 msShock response spectrum II, peak acceleration: 3 shocks in each axis and direction; 1000 m/s², 6 msBump Acceleration: 250 m/s²Free fall transportation 1.2 mRolling pitching transportation Angle: ±35 degrees; period: 8 sStatic load 10 kPaLow air pressure/high air pressure 70 kPa/106 kPaDirective 1999/5/ECEMC: EN 301 489-1EMC: EN 301 489-7Safety: EN 60950-1GSM 3GPP TS 51.010-1Tested according to GCF-CC
8. AT COMMAND SUMMARY36 LZT 123 7607 R1B8. AT Command SummaryThe AT standard is a line-oriented command language. AT is an abbreviation of ATtention and it is always used to start sending a command line from the terminal equipment (TE) to the terminal adaptor (TA).The command line consists of a string of alphanumeric characters. It is sent to the GT47 to instruct it to perform the commands specified by the characters.As the list of AT commands supported occasionally changes, it is wise to check the latest listing with Sony Ericsson before starting any software development (see “Service and Support”, page 9).The AT commands listed below are supported by the GR47/48 (italic) within the GT47. Be aware that not all AT commands will perform valid operations in the GT47 owing to its modified range of IOs.AT Command DescriptionAT Attention CommandAT&C Circuit 109 (DCD) ControlAT&D Circuit 108 (DTR) ResponseAT&F Set to Factory Defined ConfigurationAT&S Circuit 107 (DSR) responseAT&W Store User ProfileAT* List all Supported AT CommandsAT*E2APC Application Program ControlAT*E2APD Application Program DownloadAT*E2APR M2M Audio Profile ManipulationAT*E2CD Ericsson M2M Cell DescriptionAT*E2EAMS Ericsson M2M Audio Profile ModificationAT*E2EMM Ericsson M2M Engineering Monitoring ModeAT*E2ESC M2M Escape Sequence Guard TimeAT*E2FAX Ericsson M2M Fax Comm. Baud Rate ModificationAT*E2IO Ericsson M2M Input/Output Read/WriteAT*E2OTR Operational Temperature ReportingAT*E2NBTS Ericsson M2M Neighbour BTSAT*E2NMPR Ericsson M2M Set NMEA (GPS) Port RateAT*E2PBCS Ericsson M2M Phonebook Check SumAT*E2PHFB Portable Handsfree Button Sense Enable
8. AT COMMAND SUMMARY37 LZT 123 7607 R1BAT*E2SMSRI Ring Indicator for SMSAT*E2SPI Serial Peripheral InterfaceAT*E2SPN M2M Service Provider IndicationAT*E2SSD M2M Supplementary Service DispatchAT*E2SSI M2M Supplementary Service IndicationsAT*E2SSN Ericsson M2M SIM Serial NumberAT*E2STKC M2M STK Set Up CallAT*E2STKD M2M STK Display TextAT*E2STKG M2M STK Get InkeyAT*E2STKI M2M STK Get InputAT*E2STKL M2M STK Select ItemAT*E2STKM M2M STK Set Up MenuAT*E2STKN M2M STK Envelope (Menu Selection)AT*E2STKS SIM Application Toolkit SettingsAT*E2STKTO SIM Application Toolkit SettingsAT*EALR Ericsson Audio Line RequestAT*EALS Ericsson Request ALS StatusAT*EAMS Ericsson Audio Mode SelectionAT*EARS Ericsson Audio Ring SignalAT*ECAM Ericsson Call MonitoringAT*ECPI Ciphering IndicatorAT*ECSP Ericsson Customer Service ProfileAT*EDIF Ericsson Divert FunctionAT*EDST Ericsson Daylight Saving TimeAT*EENMEA NMEA (GPS) Mode on UART2AT*EGIR Ericsson Group Item ReadAT*EIPS Identity Presentation SetAT*ELAM Ericsson Local Audio ModeAT*ELIN Ericsson Line SetAT*EMAR Ericsson Master ResetAT*EMIC Ericsson Microphone ModeAT*EMIR Ericsson Music Mute Indication RequestAT*EPEE Ericsson Pin EventAT Command Description
8. AT COMMAND SUMMARY38 LZT 123 7607 R1BAT*EPNR Ericsson Read SIM Preferred NetworkAT*EPNW Ericsson Write SIM Preferred NetworkAT*ESAG Ericsson Add to GroupAT*ESCG Ericsson Create GroupAT*ESCN Ericsson Set Credit Card NumberAT*ESDG Ericsson Delete GroupAT*ESDI Ericsson Delete Group ItemAT*ESGR Ericsson Group ReadAT*ESIL Ericsson Silence CommandAT*ESLN Ericsson Set Line NameAT*ESMA Ericsson Set Message Alert SoundAT*ESMM Ericsson Settings Minute MinderAT*ESNU Ericsson Settings NumberAT+CACM Accumulated Call MeterAT+CALA Set AlarmAT+CALD Alarm DeleteAT+CAMM Accumulated Call Meter MaximumAT+CAOC Advice of ChargeAT+CBST Select Bearer Service TypeAT+CCFC Call Forwarding Number and ConditionsAT+CCLK Set Clock and DateAT+CCWA Call WaitingAT+CEER Extended Error ReportAT+CFUN Set ME FunctionalityAT+CGACT PDP Context Activate or DeactivateAT+CGATT GPRS Attach or DetachAT+CGDATA Enter Data StateAT+CGDCONT Define PDP ContextAT+CGEREP GPRS Event ReportingAT+CGMI Read MS Manufacturer IdentificationAT+CGMM Read MS Model IdentificationAT+CGMR Read MS Revision IdentificationAT+CGPADDR Show PDP AddressAT Command Description
8. AT COMMAND SUMMARY39 LZT 123 7607 R1BAT+CGQMIN Quality of Service Profile (Minimum Acceptable)AT+CGQREQ Quality of Service Profile (Requested)AT+CGREG GPRS Network Registration StatusAT+CGSMS Select Service for MO SMS MessagesAT+CGSN Read MS Product Serial Number IdentificationAT+CHLD Call Hold and MultipartyAT+CHSC HSCSD Current Call ParametersAT+CHSD HSCSD Device ParametersAT+CHSN HSCSD Non Transparent Call ConfigurationAT+CHSR HSCSD Parameters ReportAT+CHSU HSCSD Automatic User Initiated UpgradingAT+CHUP Hang Up CallAT+CIMI Subscriber IdentificationAT+CIND Indicator ControlAT+CLAC List All Available AT CommandsAT+CLCK Facility LockAT+CLIP Calling Line IdentificationAT+CLIR Calling Line Identification RestrictionAT+CMEE Mobile Equipment ErrorAT+CMER Mobile Equipment Event ReportingAT+CMGC Send CommandAT+CMGD Delete MessageAT+CMGF Message FormatAT+CMGL List MessageAT+CMGR Read MessageAT+CMGS Send MessageAT+CMGW Write Message to MemoryAT+CMOD Call ModeAT+CMSS Send From StorageAT+CMUX Switch to 07.10 Multiplex ProtocolAT+CNMI New Message Indications to TEAT+CNUM Subscriber NumberAT+COLP Connected Line Identification on PresentationAT Command Description
8. AT COMMAND SUMMARY40 LZT 123 7607 R1BAT+COPS Operator SelectionAT+CPAS ME Activity StatusAT+CPBF Phonebook FindAT+CPBR Phonebook ReadAT+CPBS ME StorageAT+CPBW Phonebook WriteAT+CPIN PIN ControlAT+CPMS Preferred Message StorageAT+CPUC Price Per Unit and Currency TableAT+CPWD Change PasswordAT+CR Service Reporting ControlAT+CRC Cellular Result CodeAT+CREG Network RegistrationAT+CRES Restore SMS SettingsAT+CRLP Radio Link ProtocolAT+CSAS Save SettingsAT+CSCA Service Centre AddressAT+CSCB Select Cell Broadcast Message TypeAT+CSCS Select Character SetAT+CSDH Show Text Mode ParametersAT+CSMP Set Text Mode ParametersAT+CSMS Select Message ServiceAT+CSQ Signal StrengthAT+CSSN Supplementary Service NotificationAT+CTZU Automatic Time Zone UpdateAT+CUSD Unstructured Supplementary Service DataAT+CVHU Voice Hang-UpAT+F___ Low Level Fax CommandsAT+GMI Read Manufacturer IdentificationAT+GMM Read Model IdentificationAT+GMR Read Revision IdentificationAT+ICF Cable Interface Character FormatAT+IFC DTE-DCE Local Flow ControlAT Command Description
8. AT COMMAND SUMMARY41 LZT 123 7607 R1BAT+ILRR Cable Interface Local Rate ReportingAT+IPR Cable Interface Port CommandAT+VTS DTMF and Tone GenerationAT+WS46 Mode SelectionATA AnswerATD DialATE Command EchoATH Hang upATI Identification InformationATL Monitor Speaker LoudnessATM Monitor Speaker ControlATO Return to Online Data ModeATP Select Pulse DiallingATQ Result Code SuppressionATS0 Automatic Answer ControlATS2 Escape Sequence CharacterATS3 Command Line Termination CharacterATS4 Response Formatting CharacterATS5 Command Line Editing Character (BACKSPACE)ATS6 Blind Dial Delay ControlATS7 Connection Completion TimeoutATS8 Comma Dial Modifier Delay ControlATS10 Automatic Disconnect Delay ControlATT Select Tone DiallingATV DCE Response FormatATX Call Progress Monitoring ControlATZ Reset to Default ConfigurationAT Command Description
9. ABBREVIATIONS AND DEFINITIONS42 LZT 123 7607 R1B9. Abbreviations and DefinitionsAbbreviation ExplanationsCBM Cell Broadcast MessageCBS Cell Broadcast ServiceCSD Circuit Switched DataDCE Data Circuit Terminating EquipmentDTE Data Terminal EquipmentDTMF Dual Tone Multi FrequencyEFR Enhanced Full Rate EMC Electro-Magnetic CompatibilityETSI European Telecommunication Standards InstituteFR Full Rate GPRS General Packet Radio ServiceGSM Global System for Mobile CommunicationHigh Side Switch Pin is driven high, to Vin, in the active stateHR Half RateHSCSD High Speed Circuit Switched DataITU-T International Telecommunication Union - Telecommunications Standardisation SectorLow Side Switch Pin is driven low in the active state. High state requires external pull up,ME Mobile EquipmentMO Mobile OriginatedMS Mobile StationMT Mobile TerminatedPDU Protocol Data UnitRLP Radio Link ProtocolRF Radio FrequencyRTC Real Time ClockSIM Subscriber Identity ModuleSMS Short Message Service
9. ABBREVIATIONS AND DEFINITIONS43 LZT 123 7607 R1BTA Terminal AdapterTE Terminal EquipmentTS Telecommunication ServicesUSSD Unstructured Supplementary Service DataAbbreviation Explanations

Navigation menu