Sony 6220512 Technical Manual

GT47/GT48

Technical Description

Product Photo/Illustration

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, 2003

Publication number: LZT 123 7607 R1B

Printed in UK

Contents

1. Introduction .............................................................................................................. 4

1.1 Description ........................................................................................... 4

1.2 Highlights ........................................................................................... 4

1.3 Main Features and Services............................................................................... 5

1.4 Service and Support ......................................................................................... 9

1.5 Precautions ........................................................................................... 9

2. Mechanical Description.......................................................................................... 10

2.1 Overview ......................................................................................... 10

2.2 Physical Dimensions...................................................................................... 11

3. Electrical Description ............................................................................................. 12

3.1 Power Supply and Extended I/O Connector ................................................... 12

3.2 RS232 Serial and Extended I/O Interface ....................................................... 16

3.3 Audio Connector ......................................................................................... 22

3.4 Antenna Connector........................................................................................ 24

3.5 SIM Card Reader ......................................................................................... 25

3.6 Real Time Clock ......................................................................................... 25

3.7 Software Updates ......................................................................................... 26

4. Embedded Applications ......................................................................................... 27

4.1 Features ......................................................................................... 27

4.2 Implementation ......................................................................................... 27

5. TCP/IP Stack........................................................................................................... 29

5.1 Implementation ......................................................................................... 29

6. Operation................................................................................................................. 30

6.1 Switching the GT47 On ................................................................................ 30

6.2 Switching the GT47 Off................................................................................ 30

6.3 Operating States/LED.................................................................................... 30

6.4 Power Save ......................................................................................... 31

6.5 Controller Mode ......................................................................................... 31

7. Technical Data ........................................................................................................ 32

8. AT Command Summary......................................................................................... 36

9. Abbreviations and Definitions............................................................................... 42

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1. Introduction

1.1 Description

The 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.

1. INTRODUCTION

Note! When the GT47 is referred to in the text the description covers the GT48

1.2 Highlights

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.

as well; unless specifically mentioned.

All functions described inside this Technical Description are only possible
when the SIM-Card is inserted.

• 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

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• Data: GPRS, HSCSD, CSD, SMS

• Voice: full rate, enhanced full rate, half rate

4

1. INTRODUCTION

• 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 Services

The 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 Station

The GT47 is a dual band control terminal with the GSM radio
characteristics shown in the table below.

GT47 E-GSM 900 GSM 1800

Frequency Range (MHz) TX: 880-915

Channel spacing 200 kHz 200 kHz
Number of channels 174 carriers *8 ti me slots

Modulation GMSK GMSK
TX phase accuracy < 5º RMS phase error (burst) < 5º RMS phase error (burst)
Duplex spacing 45 MHz 95 MHz
Receiver sensitivity at

antenna connector
Transmitter output power at

antenna connector
Automatic hand-over bet ween EGS M 900 and GSM 1800

RX: 925-960

E-GSM: channels 0 to 124
channels 975 to 1023

< –102 dBm < –102 dBm

Class 4
2 W (33 dBm)

TX: 1710-1785
RX: 1805-1880

374 carriers * 8 time slots
DCS: channels 512 to 885

Class 1
1 W (30 dBm)

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1. INTRODUCTION

GT48 GSM 850 GSM 1900

Frequency Range (MHz) TX: 824-849

Channel spacing 200 kHz 200 kHz
Number of channels 124 carriers *8 time slots

Modulation GMSK GMSK
TX Phase Accuracy < 5º RMS phase error (burst) < 5º RMS phase error (burst)
Duplex spacing 45 MHz 80 MHz
Receiver sensitivity at

antenna connector
Transmitter output power

at antenna connector
Automatic hand-over bet we en GS M 850 and GS M 1900

1.3.2 Short Me ss age Service

The GT47 supports the following SMS services:

• Sending; MO (mobile-originated) with both PDU (protocol data unit)
and text mode supported.

RX: 869-894

GSM: channels 128 to 251

< –102 dBm < –102 dBm

Class 4
2W (33 dBm)

TX: 1850-1910
RX: 1930-1990

299 carriers * 8 time slots
PCS: channels 512 to 810

Class 1
1 W (30 dBm)

1.3.3 Voice Services

• 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 7­bit encoding. For 8-bit data, the maximum length is 140 characters. The
GT47 supports up to 6 concatenated messages to extend this function.

The 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.

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DTMF (Dual Tone Multi Frequency) is supported.

The GT48 also supports the Adaptive Multi Rate (AMR) type of vocoder.

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1.3.4 Data Ser v ic e s

1.3.5 Fax Ser vi ces

1. INTRODUCTION

The 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.

The 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 Supple mentary Servic e s

• 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 transfer

1.3.7 Serial Com m u n ic a t io n

The 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.

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1. INTRODUCTION

Once 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 information

Additionally 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 Interface

The 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 output

In addition, 6 of the control signals on the primary RS232 interface can be
reconfigured for use as digital inputs or outputs if required.

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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.

8

1.3.9 Interfacing with the GT47

The 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 Support

To contact customer support please use the details below:

Customer Support
Sony Ericsson Mobile Communications
Maplewood Building
Chineham Business Park
Basingstoke

RG24 8YB

1. INTRODUCTION

1.5 Precautions

E-mail: [e-mail]
or

[e-mail]

Information about Sony Ericsson and its products is available on the
following web site:

http://www.SonyEricsson.com/M2M

The 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.

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2. MECHANICAL DESCRIPTION

A

r

2. Mechanical Description

2.1 Overview

The 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.

ntenna

connector

RS232 serial and
extended I/O connector

LED

Access to
SIM card

Figure 2.1 Module viewed from the left side

Mounting hole (x2)

Audio
connector

Figure 2.2 Module viewed from the right side

Power supply and
extended I/O connecto

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2.2 Physical Dimensions

2. MECHANICAL DESCRIPTION

3.5

51.0

11.0

(x2)

55.3

71.5

10.6

45.3

66.4

9.0

26.2

11.0

77.4

Measurements are given in millimetres. See also “Technical Data”, page 32.

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3. ELECTRICAL DESCRIPTION

3. Electrical Description

All electrical connections to the module are protected in compliance with
the standard air (8
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 Connector

An 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.

kV) and contact (4 kV) Electrostatic Discharge (ESD)

General signal description:

1 V

IN

2 OUT-2
3 IN-1
4 TO_IN
5 OUT-1
6 GND

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3. ELECTRICAL DESCRIPTION

The power connector electrical characteristics are listed below:

Pin Signal Dir Limits Description

1 V
2 OUT-2 O 32V, 0.25A Low side switch, short circuit protected

3 IN-1 I –0.5 - 32 V Digital Input

4 TO_IN I –0.5 - 32 V Active low control line used to switch

5 OUT-1 O VIN, 0.4A High side switch, short circuit protected
6 GND I - Negative power (ground) in p ut and

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 Interface

IN

I 5 - 32 V Positive power input

VIH > 3V, VIL < 2.8 V
Internal Pull Down of 40KΩ

the GT47 off/on.
VIH > 5 V, VIL < 2 V

Power off/on: t > 0.2 s
Internal Pull Up to VIN of 20KΩ

return path for TO_IN and the extended
inputs and outputs

The supply voltage VIN, required by the GT47, is in the range 5V - 32V
d.c. V

and GND are reverse polarity and over voltage protected.

IN

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 V

or GND

IN

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.

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