Multitech MTSGSM, MultiMobile MTSGSM User Manual

SoftGSM Kit

Model MTSGSM

SoftGSM Kit

User Guide

User Guide

88310800 Revision A

MultiMobile (Model MTSGSM)

This publication may not be reproduced, in whole or in part, without prior expressed written
permission from Multi-Tech Systems, Inc. All rights reserved.

Copyright © 1999, by Multi-Tech Systems, Inc.

Multi-Tech Systems, Inc. makes no representations or warranties with respect to the contents hereof
and specifically disclaims any implied warranties of merchantability or fitness for any particular
purpose. Furthermore, Multi-Tech Systems, Inc. reserves the right to revise this publication and to
make changes from time to time in the content hereof without obligation of Multi-Tech Systems, Inc.
to notify any person or organization of such revisions or changes.

Record of Revisions

Revision Description

A Manual released. All pages at revision A.
(2/12/99)

Trademarks

MultiMobile, Multi-Tech, and the Multi-Tech logo are trademarks of Multi-Tech Systems, Inc.
SoftGSM is a trademark of Micro Systemation AB.
Windows NT, Windows 95, and Windows 98 are a registred trademarks of Microsoft Corporation. Other product names

used in this publication are for identification purposes only and may be trademarks of their respective companies.
Microsoft, Windows, Windows 95, Windows 98, and Windows NT are either registered trademarks or trademarks of

Microsoft Corporation in the United States and/or other countries.

Multi-Tech Systems, Inc.

2205 Woodale Drive

Mounds View , Minnesota 55112

[phone] or [phone]

Fax [phone]

Tech Support [phone]

BBS [phone] or [phone]

Internet Address: http://www.multitech.com

Fax-Back [phone]

EMC and Safety Compliance

The CE mark is affixed to the enclosed MultiTech product to confirm compliance with the following
European Community Directives:

• Council Directive 89/336/EEC of 3 May 1989 on the approximation of the laws of Member
States relating to electromagnetic compatibility; and

• Council Directive 73/23/EEC of 19 February 1973 on the harmonization of the laws of
Member States relating to electrical equipment designed for use within certain voltage limits;

both amended by Council Directive 93/68/EEC of 22 July 1993 on the harmonization of CE marking
requirements.

Contents

Chapter 1 - Introduction and Description

Introduction .......................................................................................................................................................6

Preview of this Guide ........................................................................................................................................6

Related Documentation.....................................................................................................................................7

T echnical Specifications....................................................................................................................................8

Data Transmission Support ........................................................................................................................8

Short Message Service (SMS) Support...................................................................................................... 8

Commands Supported ................................................................................................................................8

GSM Handsets supported .......................................................................................................................... 8

Cables provided..........................................................................................................................................8

Operating systems supported..................................................................................................................... 8

User Interface .............................................................................................................................................9

Computers supported .................................................................................................................................9

Chapter 2 - Getting Started

Unpacking .......................................................................................................................................................12

Requirements.................................................................................................................................................. 12

Setup...............................................................................................................................................................13

Connecting the Phone to the Computer....................................................................................................13

Chapter 3 - Software Installation

Installing the Software .....................................................................................................................................16

Loading your Driver Software..........................................................................................................................16

Utility Software ............................................................................................................... .................................19

Phonebook Manager.................................................................................................................................19

SMS Manager...........................................................................................................................................19

Settings.....................................................................................................................................................20

Getting Help..............................................................................................................................................20

Chapter 4 - SMS and Phonebook Applications

Introduction .....................................................................................................................................................22

Short Message Service Utility .........................................................................................................................22

Receiving SMS Messages........................................................................................................................22

Sending SMS Messages .......................................................................................................................... 23

Phonebook Utility ............................................................................................................................................ 23

New Phonebook .......................................................................................................................................24

New Record ..............................................................................................................................................24

Delete ....................................................................................................................................................... 24

Read Phonebook ......................................................................................................................................25

Write Phonebook ...................................................................................................................................... 25

Settings ...........................................................................................................................................................26

Chapter 5 - SoftGSM AT Commands, S-Registers and Error Codes

Introduction .....................................................................................................................................................30

Standard A T Commands ........................................................................................................................... 30

Fax A T Commands ...................................................................................................................................34

Extended A T Commands ..........................................................................................................................35

S-Registers ...............................................................................................................................................42

Error Codes .............................................................................................................................................. 45

iii

Chapter 6 - Troubleshooting

Introduction .....................................................................................................................................................48

Frequently Asked Questions (FAQs)............................................................................................................... 48

General FAQs........................................................................................................................................... 48

Windows 95/98 FAQs ............................................................................................................................... 51

Windows NT FAQs ...................................................................................................................................51

Troubleshooting Procedures ........................................................................................................................... 52

Chapter 7 - Warranty, Service, and Technical Support

Introduction .....................................................................................................................................................54

Software User License Agreement.................................................................................................................. 54

Limited Warranty .............................................................................................................................................55

On-line Warranty Registration...................................................................................................................55

Tech Support ................................................................................................................................................... 55

Recording MultiMobile SoftGSM Information ............................................................................................55

Contacting Tech Support via E-mail..........................................................................................................56

Service ............................................................................................................................................................56

The Multi-Tech BBS ........................................................................................................................................56

To log on to the Multi-Tech BBS................................................................................................................ 56

To Download a file..................................................................................................................................... 57

About the Internet............................................................................................................................................ 57

About the Multi-Tech Fax-Back Service ..........................................................................................................58

Appendices

Appendix A - Understanding GSM...................................................................................................................60

Introduction ...............................................................................................................................................60

About GSM Data.......................................................................................................................................60

For More Information ................................................................................................................................65

Glossary

GSM Acronyms.........................................................................................................................................71

Index

iv

SoftGSM Kit

Chapter 1 - Introduction and Description

MultiMobile SoftGSM User Guide

Introduction

Welcome to Multi-Tech’s MultiMobile SoftGSM, model MTSGSM, consisting of a cable and software
(driver and utility applications) which enables digital, cellular, radio communications. The special
Multi-Tech cable provides the connection between a GSM-compatible PC and a GSM-supported
handset. The driver software loads the device drivers providing access to Global System for Mobile
Communications (GSM) services. The utility software provides access to additional services such as
Phonebook Manager and Short Message Service (SMS) Manager.

GSM is a digital cellular radio network used throughout most of the industrial world. It provides
wireless customers with the most advanced digital technology available in the marketplace today .
GSM simplifies data transmission to allow laptop and palmtop computers to be connected to GSM
phones. It provides integrated voice mail, high-speed data, fax, paging and short message services
(SMS) capabilities. With GSM, customers get the advantage of the most secure communications,
unparalleled call privacy , and fraud prevention. In addition, GSM of fers the best voice quality of any
digital wireless standard. Independent laboratory and field test reports validate near wireline parity .

Figure 1-1. MultiMobile SoftGSM

MultiMobile SoftGSM is licensed for users of any Multi-Tech mobile product. Multi-Tech’s MultiMobile
SoftGSM kit supports Ericsson, Nokia, and Siemens phones using GSM only (not the Personal
Communications Service that AT&T, Sprint, and others use).

Preview of this Guide

This guide describes the MultiMobile SoftGSM and explains how to install the driver software. The
information contained in each chapter is as follows:

Chapter 1 - Introduction and Description

This chapter describes the MultiMobile SoftGSM, identifies related documentation, and lists the
technical specifications.

Chapter 2 - Getting Started

This chapter provides information on unpacking the contents of your MultiMobile SoftGSM Kit,
defines the computer and software requirements, and describes how to set up (i.e., connect the GSM
phone to your laptop).

Chapter 3 - Software Loading and Configuration

This chapter details the installation of the device drivers.

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MTSGSM

Chapter 1 - Introduction and Description

Chapter 4 - SMS and Phonebook Application

This chapter describes the SMS (Short Message Service) and Phonebook applications and how you
can use them to send and receive messages.

Chapter 5 - AT Commands, S-Registers and Error Codes

This chapter describes the commands used to control the operation of your MultiMobile modem.

Chapter 6 - Troubleshooting

This chapter presents a series of FAQs (Frequently Asked Questions) which helps ensure proper
operation of your modem.

Chapter 7 - Service, Warranty and Tech Support

This chapter provides instructions on getting service for your MultiMobile SoftGSM, a statement of
limited warranty , information about our Internet presence, and space for recording information about
your MultiMobile SoftGSM prior to calling Multi-Tech’s Technical Support.

Appendix A - Understanding GSM

Appendix A provides background information on the evolution of GSM.

Glossary

Related Documentation

The complete documentation package for the MultiMobile SoftGSM Kit includes this User Guide and
a printed Quick Start Guide. The Quick Start Guide, shipped with the unit, provides the necessary
information for a qualified person to unpack, cable, and install the software to ensure proper
operation. The following guide is provided on the Manuals diskette that ships with each MultiMobile
SoftGSM Kit, and you can always find the latest version at Multi-Tech’s Web site.

At the Multi-Tech Home Page (http://www.multitech.com), Click Support, then Manuals, then
MultiMobile SoftGSM Kit and you will find the following guide listed by title:

• MultiMobile SoftGSM Kit User Guide

MTSGSM

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MultiMobile SoftGSM User Guide

Technical Specifications

Data Transmission Support

• Non-transparent data mode, uses Radio Link protocol (GSM 04.22)

• Transparent data mode (GSM 04.21)

• Transmission speed: 300-9600 bps (limited by the GSM Network)

• Support for UDI (Unrestricted Digital Information; used for ISDN connections)

• Support for V.42

bis

Data Compression under RLP* (Radio Link Protocol)

Short Message Service (SMS) Support

• Mobile T erminated (MT)

• Mobile Originated (MO)

• PDU (Protocol Data Unit) mode

• CONCA T (Concatenated) mode - more than 160 characters in a single message

Commands Supported

• A T command set for GSM Mobile Equipment - GSM 07.07

• Interface for SMS - GSM 07.05

GSM Handsets supported

• Nokia 51 10, 5190, 6110, 6150, 6190

• Ericsson 318, 388, 628, 688, 768, 788, 788e, 868, 888

• Siemens S10

Note: Additional handset support will be added when available.

Cables provided

Multi-Tech provides one of 4 different cables (depending on your handset).

• MTSGSM-N6100 (for Nokia 5110, 5190, 6110, 6150, and 6190 handsets)

• MTSGSM-E388 (for Ericsson 318 and 388 handsets)

• MTSGSM-E688 (for Ericsson 628, 688, 768, 788, 788e, 868, and 888 handsets)

• MTSGSM-S10 (for Siemens S10 handset)

Operating systems supported

• Windows 95

• Windows 98

• Windows NT

*Not all carriers support V.42
information.

8

bis

under RLP. Check with your subscriber service for support

MTSGSM

User Interface

The MultiMobile SoftGSM Kit disk provides the following software applications (Refer to Chapter 4)

• SMS send/receive application

• Phone Book management application

Computers supported

• SoftGSM is "Toshiba Approved" (Toshiba has tested and approved SoftGSM).

• All major brands of laptop GSM-compatibles that meet MultiMobile SoftGSM requirements

Chapter 1 - Introduction and Description

MTSGSM

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MultiMobile SoftGSM User Guide

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MTSGSM

SoftGSM Kit

Chapter 2 - Getting Started

MultiMobile SoftGSM User Guide

Unpacking

The MultiMobile SoftGSM Kit includes two disks (i.e., the software setup disk and the manuals disk
with the MultiMobile SoftGSM Kit User Guide), the appropriate PC-to-phone cable, and a printed
Quick Start Guide.

Four USB V.90 Modems

Quick Start Guide

Requirements

A host-based GSM node requires the following:

• PC with minimum 486 processor

• At least 8 Mbs RAM

• At least 3 Mbs of free hard disk space

• Windows 95, Windows 98, or Windows NT
Note: Windows NT users must have Administrator privileges (super user rights) to install

MultiMobile SoftGSM under Windows NT.

IMPORTANT: Cellular phone subscriptions MUST include corresponding services (data, fax and
SMS); otherwise, MultiMobile SoftGSM will not work. Check with your network operator.

MADE IN U.S.A

MADE IN U.S.A

Figure 2-1. MultiMobile SoftGSM Kit Contents

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Setup

This section describes how to make your MultiMobile SoftGSM operational. For additional
information, refer to the Help files.

Connecting the Phone to the Computer

Making the connection between the phone and the computer is easy with the MultiTech-supplied
cable.

1. Connect the serial cable’s 9-pin connector to the COM port on the laptop.

Chapter 2 - Getting Started

9-pin Connector

Figure 2-2. Connection to the Computer

2. Plug the serial cable’s phone connector into the phone.

Figure 2-3. Connection to the Phone

Phone Connector

MTSGSM

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MultiMobile SoftGSM User Guide

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MTSGSM

SoftGSM Kit

Chapter 3 - Software Installation

MultiMobile SoftGSM User Guide

Installing the Software

MultiMobile SoftGSM software installation consists of installing the applicable device drivers and the
utility software. The procedure which follows does not provide every screen or option.

Loading your Driver Software

1. Ensure that your phone is cabled to the computer (Refer to Chapter 2).

2. Insert the Setup disk into your computer’s disk drive.

3. Click the Windows 95/98 or Windows NT

4. Select the RUN command.

5. In the Run dialog box, click the down arrow and select:

Click OK or press

6. The Welcome dialog box is displayed.

ENTER

on the keyboard.

START

button.

A:\SETUP.

Click Next >.

7. The SoftGSM License Agreement dialog box is displayed. Read it carefully!
If you don’t agree, click No to stop the installation. Click Yes to continue.

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Chapter 3 - Software Loading and Configuration

8. The User Information dialog box is displayed.

Enter your name and name of company , then click Next >.

9. The Choose Destination Location dialog box is displayed.

Use the default installation destination, or use the browse button to select another destination.
Once you have selected the destination, click Next >.

10. The Select Components dialog box is displayed.

Select the components you want to install and Click Next >.
Note: Users who: (1) do not have messaging services, should not enable the “SMS &

Phonebook Program” option; (2) do not have SMS messaging services can enable the “SMS &
Phonebook Program” to use the “Phonebook” portion only . SMS will not work without the correct
services from your GSM provider.

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MultiMobile SoftGSM User Guide

1 1. The drivers automatically detect where the phone is installed and display the following screen:

Click Yes.

CAUTION: If the drivers cannot detect where the phone is installed, the install procedure will
display the Select Com Port dialog box at this time. Highlight the appropriate port and click
Next >, and continue with the installation. Once finished, reboot and verify that you can use the
program. If you can’t, refer to the Troubleshooting section (Chapter 6).

12. The Select Program Folder dialog box is displayed.
Select where you want to install the program icons. Click Next >.

13. The Setup Complete dialog box is displayed. Before you can use the program, you must first
reboot the computer.

Remove the disk, check the preferred restart option, and click Finish to complete setup.

Note: Don’t forget to register your MultiMobile SoftGSM at
receive upcoming information and upgrades.

http://www.multitech.com/register

to

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Utility Software

The MultiMobile SoftGSM utility provides SoftGSM Short Message Service (SMS), Phonebook
management, Settings options, and online Help.

Click Start | Programs | SoftGSM | SMS & Phonebook to display the SoftGSM SMS &

Phonebook management dialog box.

Phonebook Manager

The Phonebook tab gives you quick and simple control over all the phone numbers and names in
your personal and cellular phone databases. You can add, change, or move phone numbers and
names more easily using Phonebook Manager than by using the handset controls and LCD display .
In addition, you can build multiple phonebooks.

Note: MultiTech Systems recommends that you always use international phone numbers. That way
you do not have to bother with different country codes when you travel.

Chapter 3 - Software Loading and Configuration

Figure 3-1. SoftGSM SMS & Phonebook management (Phonebook)

SMS Manager

The SMS tab allows you to determine the phone number of your local SMS Center and to configure
the application with this number. Remember, before you can send any SMS messages, you need to
know the phone number of your local SMS Center and configure the application with this number. If
you do not have the SMS number, check with your network operator.

This number should be entered as an international number.

Figure 3-2. SoftGSM SMS & Phonebook management (SMS)

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MultiMobile SoftGSM User Guide

Settings

The Settings tab allows you to select your Service Center and identifies the path to your
phonebook.dat file. In addition, it allows you to select the type of outgoing SMS and check whether or
not you want the modem conversation logged.

Figure 3-3. SoftGSM SMS & Phonebook management (Settings)

Getting Help

If you have a problem with the product that is not covered in this guide or the Help files, or if at any
time you need more help, view the online Help on the Internet at
Dealer or Local Distributor.

www.multitech.com

or contact your

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SoftGSM Kit

Chapter 4 - SMS and Phonebook Applications

MultiMobile SoftGSM User Guide

Introduction

With the Short Message Service (SMS) and Phonebook applications you can:

• Send and receive SMS messages up to 160 characters long

• Administer the phonebook (i.e., edit, add, delete, and download records) from your own

phone

• Create and store multiple phonebooks on your PC and download to your phone the one

currently needed.

Short Message Service Utility

The Short Message Service (SMS) utility allows you to send and receive SMS messages. SMS is an
integrated paging service that allows GSM cellular suscribers to receive and send data right on their
cellular phone’s LED display (up to 160 characters). When connected to your laptop, you can receive
urgent e-mail, fax notifications, news and stock quotes, etc, without dialing the phone. You can
receive messages even as you are making a phone call.

Receiving SMS Messages

Receiving an SMS message is very simple. The application detects incoming SMS messages
whenever you are not sending SMS messages or whenever you are reading or writing to the
phonebook.

When an SMS message is received, it is displayed in the New Message dialog box. From there, you
can copy the message and paste it wherever you want. The date and time that the new SMS
message was received is also shown in the dialog box (See Figure 4-1).

Note: SMS uses the European date and time formats. For date, the first two digits represent the year,
the second two digits represent the month, and the last two digits represent the day . For time, the first
two digits represent the hour (military format), the second two digits represent the minutes, and the
last two digits represent the seconds.

Figure 4-1. Receiving an SMS Message

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Sending SMS Messages

To send an SMS message, click the SMS tab on the SoftGSM SMS & Phonebook management
dialog box and enter the message, the recipient’s number , and then press the Send SMS button. If
the recipient’s number is an international number , then omit any leading zeros. For example, the
Swedish number 0701234567 should be entered as 46701234567 if it is to be interpreted as an
international number.

Chapter 4 - SMS and Phonebook Application

On the Settings tab, you can select the type of coding to be used when sending an SMS message.
The 7-bit coding scheme should work for most transmissions.

Phonebook Utility

Phone numbers can be stored in either the memory of the phone or the SIM (Subscriber Information
Module) card in your GSM phone. To simplify the handling of all the numbers, you can use the
phonebook functionality of MultiMobile SoftGSM. You can work with multiple phonebooks, editing,
adding and deleting records and then upload the updated phonebooks to the preferred storage in the
phone (memory or SIM). You can also download your current phonebook from the phone and store
or edit it on your PC.

Each phonebook record contains:

• Name: used to store a descriptive text for the record

• Phonenumber: contains the phone number

• International: used to indicate if the phone number is an international number
(i.e., it contains a country code) or is a national number

To edit the properties of a phonebook or a record, click on its name in the tree presentation, then edit
its properties to the right.

The Phonebook functions include:

Figure 4-2. Sending an SMS Message

• New record

• New phonebook

• Read phonebook (from phone)

• Write phonebook (to phone)

• Delete (record or phonebook)

MTSGSM

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MultiMobile SoftGSM User Guide

New Phonebook

From the SoftGSM SMS & Phonebook management dialog box, Phonebook tab, click New
phonebook to create a new, empty phonebook. You can set the name of the phonebook in the

‘Name’ field on the upper right (See Figure 4-3).

Figure 4-3. Creating a New Phone Book

New Record

From the SoftGSM SMS & Phonebook management dialog box, Phonebook tab, click New
record to create a new entry in the phonebook. You are automatically positioned at this record so

you can edit its properties. The record is created in the phonebook that currently has the focus. You
set focus to a phonebook by clicking on the phonebook or on a record contained in the phonebook
(See Figure 4-4).

Figure 4-4. Creating a New Record

Delete

From the SoftGSM SMS & Phonebook management dialog box, Phonebook tab, highlight the tree
item you want to delete (either a record or a phonebook), then click Delete. If you are trying to delete
a phonebook, you will be asked to confirm the deletion. The deleted item is only deleted from the
computer and not from the phone. To delete something from the phone, use the ‘Write phonebook’
function to write the updated phonebook (with records deleted) to the phone (See Figure 4-4).

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MTSGSM

Read Phonebook

From the SoftGSM SMS & Phonebook management dialog box, Phonebook tab, click Read
phonebook to display the Read phonebook dialog box for reading a phonebook from the phone.

Chapter 4 - SMS and Phonebook Application

Figure 4-5. Read Phonebook Screen

1. Click the down arrow and select the phonebook to be read. The default choice (named ‘New
phonebook’) stores the result as a new phonebook labeled ‘New phonebook’.

2. Select the storage location from which you wish to read. The available choices are the Phone
memory or the SIM-card.

3. If you selected an existing phonebook to store the result, then select how you wish to store it. You
can either choose to Overwrite (which overwrites all records currently in your phonebook) or to
Append the result to the end of your phonebook.

Write Phonebook

From the SoftGSM SMS & Phonebook management dialog box, Phonebook tab, click Write
phonebook to display the dialog box for writing a phonebook to the phone.

1. Click the down arrow and select which phonebook you want to store in the phone.

2. Select which storage method you would like the phonebook to be stored. The available choices
are Phone memory or SIM-card.

Note: The number of available slots varies from phone model to phone model and from SIM card to
SIM card. If your phonebook contains more records than the number of available slots, then some
records will not be written to the phone.

MTSGSM

Figure 4-6. Write Phonebook Screen

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MultiMobile SoftGSM User Guide

Settings

The Settings tab on the SoftGSM SMS & Phonebook management dialog box displays your
Service Center, paths to your Phonebook files, type of outgoing SMS, and Log mode conversation
information.

Figure 4-7. SoftGSM Settings Screen

Service Center

From the SoftGSM SMS & Phonebook management dialog box, Settings tab, click the Service
Center button (to the right of the Service Center and International fields) to see a list of GSM

operators with their Service Centers and phone numbers. Select the Service Center that matches
your GSM subscription (See Figure 4-8 for examples).

Figure 4-8. Service Center Screen

If your operator is not listed or the number listed is incorrect, select the existing number and replace it
by typing the number of your Service Center as an international number in the Service Center
window.

Note: The number that you have stored in your GSM phone is not used by the MultiMobile SoftGSM
modem. If you are unsure which number to use, contact your GSM operator.

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MTSGSM

Chapter 4 - SMS and Phonebook Application

Phonebook File

The phonebook file on your computer contains all the data for your phonebooks and phone numbers.
From the SoftGSM SMS & Phonebook management dialog box, Settings tab, click the button to
the right of the Phonebook file window to display the Phonebook file dialog box. Select the file you
would like to use.

Figure 4-9. Sample Phonebook File

The default file is called ‘phonebook.dat’ and resides in the same directory as the MultiMobile
SoftGSM application file.

Type of Outgoing SMS

From the SoftGSM SMS & Phonebook management dialog box, Settings tab, select the “Type of
outgoing SMS.” This sets the type of coding scheme to be used for outgoing SMS messages. The 7­bit standard option should work with most GSM phones.

Com Port Attached to the Phone

From the SoftGSM SMS & Phonebook management dialog box, Settings tab , click the button to
the right of the COM2 field to display the Select COM port dialog box. Click the down arrow to until
you find the appropriate COM port and then click OK.

Note: COM port 1 is the default.

MTSGSM

Figure 4-10. Select COM Port

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MultiMobile SoftGSM User Guide

Log Modemconversation

From the SoftGSM SMS & Phonebook management dialog box, Settings tab, if the”Log
Modemconversation” option is enabled, all communication between the application and the
MultiMobile SoftGSM modem will be logged to a file called ‘

The

log.txt

file contents can be used to help pinpoint any operational problems that may occur.

log.txt.

’

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MTSGSM

SoftGSM Kit

Chapter 5 - SoftGSM AT Commands,

S-Registers and Error Codes

MultiMobile SoftGSM User Guide

Introduction

This chapter describes all of the AT commands, S-Registers and Result Codes supported by
MultiMobile SoftGSM. This information is also available at the MultiMobile SoftGSM website at

www.softgsm.com.

International Modem Restrictions

Some dialing and answering defaults and restrictions may vary for international modems. Changing
settings may cause a modem to become non-compliant with national telecom requirements in
specific countries. Also note that some software packages may have features or lack restrictions that
may cause the modem to become non-compliant.

Standard A T Commands

AT Attention

Syntax AT
Description Used to see if modem is responding. Just returns OK.

A Answer incoming call
Syntax ATA
Description The ATA command is used to make the modem answer an incoming call. If there is

no incoming call, the command will return OK and do nothing.

http://

D Dial number
Syntax A TDn where n is the number to be dialed.
Description The ATD command is used to make an outgoing call. The number specified is dialed

and the modem tries to establish a connection. For a GSM-call the area code must
always be included in the number to be dialed.

DTn Dial number (tone dialing)
Syntax A TDTn where n is the number to be tone dialed.
Description The ATDT command is used to make an outgoing call. The number specified is tone

dialed and the modem tries to establish a connection. For a GSM-call, the area code
must always be included in the number to be dialed.

DPn Dial number (pulse dialing)
Syntax A TDPn where n is the number to be tone dialed.

Description The ATDP command is used to make an outgoing call. The number specified is pulse

dialed and the modem tries to establish a connection. For a GSM-call, the area code
must always be included in the number to be dialed.

H Hang up
Syntax A TH
Description The ATH command hangs up an ongoing call.

ATI Identify Modem
Syntax A TIn where n is as follows
Description The ATI command is used to show information about the modem

A TI0 Displays modem Manufacturer, Product name
A TI2 Displays coderevision of modem software

A TI3 Displays coderevision of modem software
A TI9 Displays modem Manufacturer, Product name

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Chapter 5 - AT Commands, S-Registers, and Error Codes

ATS Access an S-register

Syntax A TSn=s where n is the S-register to be accessed and s is the value to be set or a ?

to read the register value.

Description The ATS command is used to read and write the values of the S-registers.

A TSn=sWrite the value s to S-register number n.
A TSn=?Read and display the number stored in S-register number n.

ATZ Reset modem
Syntax A TZ
Description The ATZ command resets the modem. The default settings are restored. The Z

command is equivalent of restarting the modem.

A/ Execute previous command again
Syntax A/
Description Execute previous command again. This command reexecutes the last command that

was executed by the modem. This command shall not be followed by a carriage
return.

&F Load factory settings
Syntax A T&F
Description The AT&F command restores the factory (default) settings of the modem. This

includes restoring all the S-registers to their default settings.

&J Telephone jack selection
Syntax A T&J
Description The AT&J command has no meaning and is implemented only for compatibility

reasons.

&K Select flow control
Syntax A T&K
Description The AT&K command has no meaning and is implemented only for compatibility

reasons.

\N Select error control
Syntax A T\Nn where n is as follows
Description The AT\N command is used to select the mode of error control.

A T\N0 Transparent mode, no error correction
A T\N1 Transparent mode, no error correction
A T\N2 Non-transparent mode ie RLP (Radio Link Protocol)
A T\N3 Non-transparent mode ie RLP (Radio Link Protocol)
A T\N4 Non-transparent mode ie RLP (Radio Link Protocol)
A T\N5 Non-transparent mode ie RLP (Radio Link Protocol)

E Command echo
Syntax A TEn where n is as follows.
Description The ATE command enables or disables the echo of characters to the DTE. This

value is stored in S-register 14 bit 1.
A TE0 Disable command echo
A TE1 Enable command echo. This is the default.

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MultiMobile SoftGSM User Guide

V Result code format

Syntax A TVn where n is as follows.
Description The ATV command selects in which format the result codes from the modem are

displayed. This value is stored in S-register 14 bit 3.
A TV0 Result codes are displayed in short form (numeric).
A TV1 Result codes are displayed in long form (text). This is the default.

Q Result code responses
Syntax A TQn where n is as follows.
Description The ATQ command enables or disables the sending of result codes to the DTE.

This value is stored in S-register 14 bit 2.
A TQ0 Result codes are returned to the DTE. This is the default

A TQ1 Result codes are not returned to the DTE.

W Error correction and speed reporting
Syntax A TWn where n is as follows.
Description The ATW command controls which speed and error correction messages are

returned by the modem CONNECT message. The setting of S95 overrides this
command. This value is stored in S-register 31 bit 2 and 3.

A TW0 The CONNECT message shows the DTE speed.
A TW1 The CONNECT message shows line speed, error correction protocol and

DTE speed in that order.
A TW2 The CONNECT message shows the line speed.

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X Extended result codes

Syntax A TXn where n is as follows. Valid values of n is 0,1,2,3 and 4.
Description The ATX command controls the result codes from the modem. In the table below an *

indicates that the normal response is used and a number indicates what response
will be used instead of the normal response. This value is stored in S-register 22 bit 4
to 6.

Result Code X0 X1 X2 X3 X4

0OK *****
1 CONNECT *****
2 RING *****
3 NO CARRIER *****
4 ERROR *****
5 CONNECT 1200 1. ****
6 NO DIAL TONE 3. 3. * 3. *
7 BUSY 3. 3. 3. * *
8 NO ANSWER 1. ****
9 CONNECT 600 1. ****
10 CONNECT 2400 1. ****
11 CONNECT 4800 1. ****
12 CONNECT 9600 1. ****
13 CONNECT 7200 1. ****
14 CONNECT 12000 1. ****
15 CONNECT 14400 1. ****
16 CONNECT 19200 1. ****
17 CONNECT 38400 1. ****
18 CONNECT 57600 1. ****
22 CONNECT 1200TX/75RX 1. ****
23 CONNECT 75TX/1200RX 1. ****
24 DELAYED 4444*
32 BLACKLISTED 4444*
33 FAX *
34 +FCERROR *
35 DATA *
40 CARRIER 300 *
44 CARRIER 1200/75 *
45 CARRIER 75/1200
46 CARRIER 1200 *
47 CARRIER 2400 *
48 CARRIER 4800 *
49 CARRIER 7200 *
50 CARRIER 9600 *
51 CARRIER 12000 *
52 CARRIER 14400 *
66 COMPRESSION: CLASS 5 *
67 COMPRESSION: V.24
69 COMPRESSION: NONE *
76 PROTOCOL:NONE *
77 PROTOCOL:LAPM *
80 PROTOCOL:AL T *
81 PROTOCOL:AL T-CELLULAR *

bis

*

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&R RTS/CTS options

Syntax A T&Rn where n is as follows.
Description The AT&R command controls how the modem will handle CTS in synchronous mode.

This value is stored in S-register 21 bit 2.
A T&R0 CTS follows RTS when the modem is in data mode.
A T&R1 RTS is ignored. CTS is on. This is the default.

&C Data carrier detect (DCD) options
Syntax A T&Cn where n is as follows.
Description The AT&C command specifies carrier detect (DCD) handling. This value is stored in

S-register 21 bit 5.
AT&C0 DCD is always on.

A T&C1 DCD follows the state of carrier (default).

&S DSR options
Syntax A T&Sn where n is as follows.
Description The AT&S command specifies carrier detect (DCD) handling. This value is stored in

S-register 21 bit 6.
A T&S0 DSR is always on. This is the default.
A T&S1 DSR will become active at start of handshaking. DSR will become inactive

when carrier has been lost.

&D DTR options
Syntax A T&Dn where n is as follows.
Description The AT&D command specifies the response to the DTR from the DTE.

A T&D0 Modem ignores DTR.
A T&D2 Modem disconnects and returns OK on loss of DTR (default).

Fax AT Commands

AT+F Fax commands

MultiMobile SoftGSM supports all Class 1 Fax commands.

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Extended AT Commands

+CBC Battery charge

Syntax A T+CBC for battery charge

The response is +CBC: <bcs>,<bcl>
A T+CBC=? for a list of supported values.
The response is +CBC: (list of supported <bcs>),( list of supported <bcl>)
Error codes is returned as +CME ERROR: <err>:

Description The AT+CBC command returns the battery connection status and the battery charge

level.

Defined values Meaning
<bcs>
0 Phone is powered by the battery
1 Phone has a battery connected, but is not powered by it
2 Phone does not have battery connected
3 Recognized power fault, calls inhibited
<bcl>
0 Battery is exhausted or phone does not have a battery connected

1.100 Battery has 1-100 percent of capacity remaining

Chapter 5 - AT Commands, S-Registers, and Error Codes

+CGMI Request manufacturer identification

Syntax A T+CGMI used to get phone manufacturer.

The response is +CGMI: <manufacturer>
Error codes is returned as +CME ERROR: <err>:

Description The AT+CGMI command returns one ore more lines of information text determined

by the phone manufacturer.

Defined values Meaning
<manufacturer>Information text determined by the phone manufacturer

+CBST Select bearer service type
Syntax A T+CBST=[<speed>[,<name>[,<ce>]]] used to set bearer service.

A T+CBST? returns selected bearer service
The response is +CBST: <speed>[,<name>,<ce>]

A T+CBST=? for a list of supported bearer service types.
The response is +CBST: (list of supported <speed>), (list of supported<name>),

(list of supported <ce>)
Error codes is returned as +CME ERROR: <err>:

Description The AT+CBST command sets the bearer service <name> with data rate <speed>

and the connection element <ce> to be used when data calls are originated.

Defined values Meaning
<speed>
7 9600 bps (V.32)
71 9600 bps (V.110)
<name>
0 Asynchronous modem
<ce>
0 Transparent
1 Non-transparent (RLP)

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+CMGF Message format

Syntax A T+CMGF=<mode> used to set the message format.

A T+CMGF? returns selected message format. The response is +CMGF: <mode> .
A T+CMGF=? for a list of supported <mode>. The response is +CMGF: (list of

supported <mode>) .
Description The AT+CMGF command selects the message format to use.
Defined values Meaning
<mode>
0 PDU mode

+CGMM Request model identification
Syntax A T+CGMM used to get phone model info.

The response is +CGMM: <model>

Error codes is returned as +CME ERROR: <err>:
Description The AT+CGMM command returns one ore more lines of information text determined

by the phone manufacturer intended to identify the specific model of the phone..
Defined values Meaning
<model> Information text determined by the phone manufacturer

+CMGD Delete message
Syntax A T+CMGD=<index> used to set the message format

Error codes is returned as +CMS ERROR: <err>:
Description The AT+CMGD command deletes message with location <index> from preferred

message storage.
Defined values Meaning
<index> Location of message to be deleted.

+CMEE Report mobile equipment error
Syntax A T+CMEE=<n> used to set use of result codes.

AT+CMEE? Returns <n>. The response is +CMEE: <n> .

Enter AT+CMEE=? for a list of supported modes. The response is +CMEE: (list of

supported <n>)
Description The AT+CMEE command disables or enables the use of the result code

+CME ERROR: <err> as an indication of an error relating to the functionality of the

phone. When enabled, phone related errors cause the +CME ERROR:<err> final

result code instead of the regular ERROR final result code. ERROR is returned

normally when the error is related to syntax, invalid parameters, or TA functionality.

Test command returns values supported by the TA as a compound value.
Defined values Meaning

<n>
0 Disables +CME ERROR: <err> and use ERROR instead
1 Enables +CME ERROR: <err> and use numeric <err> values as defined in

+CME ERROR <err>

+CGMR Read message
Syntax A T+CMGR=<index> used to read a message

The response is +CMGR: <stat>,<length><CR><LF><pdu>

Error codes is returned as +CMS ERROR: <err>:
Description The AT+CMGR command reads a message with location value <index> from

preferred message storage <mem1> to the TE. Status of the message and the entire

message data unit <pdu> is returned.

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Defined values Meaning
<index> Location value of message to be read

+CMGL List messages
Syntax A T+CMGL[=<stat>| used to list messages

The response is +CMGL: <index>,<stat>,<length>,<CR><LF><pdu>
A T+CMGL=? for a list of supported <stat>.
The response is +CMGL: (list of supported <stat>)
Error codes is returned as +CMS ERROR: <err>:

Description The AT+CMGL command list messages from the preferred message storage. Entire

data units (PDU) is returned.
Defined values Meaning
<stat>
4 All messages

+CGSN Request product serial number identification
Syntax A T+CGSN used to get phone serial number info. The response is +CGSN: <sn> .

Error codes is returned as +CME ERROR: <err>:
Description The AT+CGSN command returns one ore more lines of information text determined

by the phone manufacturer intended to identify the individual phone..
Defined values Meaning
<sn> Information text determined by the phone manufacturer.

+CHUP Hangup call
Syntax A T+CHUP used hangup GSM call
Description The AT+CHUP command causes hangup of the current GSM call.

+CMGR Read message
Syntax A T+CMGR=<index> used to read a message

The response is +CMGR: <stat>,<length><CR><LF><pdu>

Error codes is returned as +CMS ERROR: <err>:
Description The AT+CMGR command reads a message with location value <index> from

preferred message storage <mem1> to the TE. Status of the message and the entire

message data unit <pdu> is returned.
Defined values Meaning
<index> Location value of message to be read

+CMGS Send message
Syntax A T+CMGS=

<length><CR>PDU is given<ctrl-z>/ESC>

used to send messages

Error codes is returned as +CMS ERROR: <err>:
Description The AT+CMGS command sends a message to the network (SMS-SUBMIT).

Message reference value <mr> is returned to the TE on successful message

delivery . The TA shall send a four character sequence <

<space

> (in hex

0xd 0xa 0x3e 0x20

) after the command line is terminated with

CR><LF><greater_than>

<CR>; after that PDU can be given. <ctrl-z> (in hex 0x1a) must be used to indicate

the ending of PDU
Defined values Meaning
<length> Must indicate the number of octets coded in the TP layer data unit to be given.

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+CNMI New message indications to modem

Syntax A T+CNMI=[<mode>[,<mt>[,<bm>[,<ds>[,<bfr>]]]]] set the new message indications.

A T+CNMI? Returns the new message indications settings.
The response is +CNMI: <mode>,<mt>,<bm>,<ds>,<bfr> .
Use AT+CNMI=? for a list of supported settings
The response is +CNMI: (list of supported <mode>), ( list of supported<mt>), ( list of

supported <bm>), ( list of supported <ds>), ( list of supported<bfr>). Error codes are
returned as +CMS ERROR: <err>:

Description The AT+CNMI command sets how receiving of new messages from the network is

indicated to modem when the modem is active.
Defined values Meaning
<mode>
1 Discard indication and reject new received message unsolicited result codes, when

the TA-TE link is reserved.
2 Buffer unsolicited result codes in the TA when TA-TE link is reserved and flush them

to the TE after reservation, otherwise forward them directly to the TE.
<mt>
0 No SMS-DELIVER indications are routed to the TE.
1 Indication of SMS-DELIVER is routed to the TE using an unsolicited result code:

+CMTI: <mem>,<index> <bm>
0 No CBM indications are routed to the TE.
1 Indication of CBM is routed to the TE using an unsolicited result code: +CBMI:

<mem>,<index>
<ds>
0 No SMS-STATUS-REPORTs are routed to the TE.
<bfr>
0 T A buffer of an unsolicited result codes defined within this command is flushed to the

TE when <mode> 1,2 isentered. T A buffer is not implemented.

+CPAS hone activity status
Syntax AT+CPAS for status.

A T+CPAS=? for a list of supported values.
Description The AT+CPAS command returns the activity status of the phone. It can be used to

check the phone before requesting action from the phone.
Possbile responses Meaning
+CP AS: 0 Ready (phone allows commands from modem)
+CPAS: 1 Unavailable (phone does not allows commands from modem)
+CPAS: 2 Unknown
+CPAS: 3 Ringing
+CPAS: 4 Call in progress
+CPAS: 5 Asleep

+CPBR Read phonebook entries
Syntax A T+CPBR=<index1>,<index2>

The response is +CPBR: <index>,<number>,<type>,<text>

A T+CPBR=? for a list of supported <index>.

The response is +CPBR: (list of supported <index>), <nlength>,<tlength>

Error codes is returned as +CME ERROR: <err>:
Description The AT+CPBR command reads phonebook entries in location number range

<index1>…<index2> from the current phonebook memory storage selected with

AT+CPBS . If <index2> is left out only one location <index1> is returned.

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Defined values Meaning
<indexn> Index number, location in storage
<number> Phone number of type <type>
<type> Type of address
<text> String of maximum length <tlength>
<nlength> Maximum length of <number>
<tlength> Maximum length of <text>

+CPBW Write phonebook entry
Syntax A T+CPBW=<index>,<number>,<type>,<text>

A T+CPBW=? for a list of supported <index>.
The response is +CPBW: (list of supported <index>), <nlength>,(list of supported

<type>), <tlength>
Error codes is returned as +CME ERROR: <err>:

Description The AT+CPBW command writes a phonebook entry in the current phonebook

memory storage selected with AT+CPBS Entry fields written are phone number
<number> and text <text> associated with the number. If those fields areomitted.

The phonebook entry is deleted.
Defined values Meaning
<index> Index number , location in storage
<number> Phone number of type <type>
<type> Type of address, default 145 when dialing string includes international access code

character ‘+’, otherwise 129.
<text> String of maximum length <tlength>
<nlength> Maximum length of <number>
<tlength> Maximum length of <text>

+CPBS Phonebook memory storage
Syntax A T+CPBS=<storage> to set phonebook memory storage. AT+CPBS? returns

selected storage.

The response is +CPBS: <storage>. Enter AT+CPBS=? for a list of supported

<storage>.

The response is +CPBS: (list of supported <storage>)

Error code is returned as +CME ERROR: <err>:
Description The AT+CPBS command selects or test which storage is used for phonebook

commands.
Defined values Meaning
<storage>

“ME” Phone memory
“SE” SIM memory

+CPMS Preferred message storage
Syntax A T+CPMS=<mem1> [, <mem2>] . The response is +CPMS: <used1>,<total1>,

<used2>,<total2>

A T+CPMS? returns selected message storage

The response is +CPMS: <mem1>,<used1>,<total1>,<mem2>,<used2>,<total2>

A T+CPMS=? for a list of supported <mem>.

The response is +CPMS: (list of supported <mem1>), ( list of supported <mem2>)

Error code is returned as +CMS ERROR: <err>:
Description The AT+CPMS command selects the memory storages <mem1> and <mem2> to be

used for reading, writing etc.

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Defined values Meaning
<mem1>
<mem2>
“SM” SIM message storage
“ME” Phone message storage
<used1> Total number of messages currently in <mem1>
<used2> Total number of messages currently in <mem2>
<total1> T otal number of message locations in <mem1>
<total2> T otal number of message locations in <mem2>

+CSCA Service centre address
Syntax AT+CSCA=<sca> [,<tosca>] .

A T+CSCA? returns selected service centre address. The response is +CSCA:
<sca>,<tosca> .

Error codes is returned as +CMS ERROR: <err>:

Description The AT+CSCA command selects the service centre address through which

messages are transmitted.
Defined values Meaning
<sca> Service Centre Address in string format
<tosca> Type of Service Centre Address octet in integer format

+CR Service reporting control
Syntax A T+CR=<mode> used to set reporting.

A T+CR? Returns <mode>

The response is +CR: <mode>

A T+CR=? for a list of supported modes

The response is +CR: (list of supported <mode>)

Error codes is returned as +CME ERROR: <err>:
Description The AT+CR command controls whether or not intermediate result code +CR:<serv>

is returned from the modem to the computer. If enabled, the intermediate result code

is transmitted at the point during the connect negotiation during which the modem

has determined the speed and quality of service to be used, before any error control

or data compression reports are transmitted, and before any final result code (e.g.,

CONNECT) is transmitted.
Defined values Meaning
<mode>
0 Disables reporting
1 Enables reporting

+CRC Cellular result codes
Syntax A T+CRC=<mode> used to set cellular result codes.

A T+CRC? Returns <mode>. The response is +CRC: <mode>.

Enter AT+CRC=? for a list of supported modes. The response is +CRC: (list of

supported <mode>).

Error codes is returned as +CME ERROR: <err>:
Description The AT+CR command controls whether or not the extended format incoming call

indication is used. When enabled, an incoming call is indicated to the TE with the

unsolicited result code +CRING: <type> instead of the normal RING.

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Defined values Meaning
<mode>
0 Disables extended format
1 Enables extended format

+CRLP Radio link protocol
Syntax A T+CRLP=[<iws>[,mws>[,<T1>[,<N2>]]]] used to set radio link protocol parameters.

A T+CRLP? returns radio link protocol parameters. The response is +CRLP:
<iws>,<mws>,<T1>,<N2>.

A T+CRLP=? for a list of supported radio link protocol parameters The response is
+CRLP: (list of supported <iws>), (list of supported <mws>), (list of supported <T1>),
(list of supported <N2>)

Error codes is returned as +CME ERROR: <err>:
Description The AT+CRLP command sets the radio link protocol parameters.
Defined values Meaning
<iws>
61 IWF to MS window size
<mws>
61 MS to IWF window size
<T1>

1.100 Acknowledgment timer
<N2>
0-10 Retransmisson attempts

+CSMS Select message service
Syntax AT+CSMS=<service> to select messaging service. The response is +CSMS:

<mt>,<mo>,<bm>

A T+CSMS? returns the selected messaging service. The response is +CSMS:

<service>,<mt>,<mo>,<bm>

A T+CSMS=? for a list of supported <service>. The response is +CSMS: (list of

supported <service>)

Error code is returned as +CMS ERROR: <err>:
Description The AT+CSMS command selects the messaging service:

A T+CSMS=<mt> for mobile terminated

A T+CSMS=<mo> for mobile originated

A T+CSMS=<bm> for broadcast type messages.
Defined values Meaning
<service>
0 GSM 03.40 and 03.41
1-127 Reserved
128 Manufacturer specific
<mt> <mo> <bm>
0 Type not supported
1 Type supported

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+CSQ Signal quality

Syntax A T+CSQ for signal strength

The response is +CSQ: <rssi>,<ber>
A T+CSQ=? for a list of supported values.
The response is +CSQ: (list of supported <rssi>),( list of supported <ber>)

Error codes is returned as +CME ERROR: <err>:
Description The AT+CSQ command returns the signal strength and bit error rate.
Defined values Meaning
<rssi>
0 -1 13 dBm or less
1 -1 11 dBm

2.30 -109 to –53 dBm
31 -51 dBm or greater
99 Not known or not detectable
<ber>
0-7 As RXQUAL………….
99 Not known or not detectable

S-Registers

S0 Auto answer ring count

Description Defines the number of rings on an incoming call before the modem tries to answer

the call.
Values Meaning
0 The modem is not answering any incoming calls. This is the default value

1.255 The modem is in autoanswer mode and answer the call of the specified number of
rings.

S1 Ring counter

Description Returns the current ring count. This register counts the incoming ring signals.

S2 Escape character

Description Defines what ASCII character is used for the escape sequence (‘+++’).
Value Meaning
0-255 The ASCII value used for the escape sequence. The default value is 43 which

corresponds to an ASCII ‘+’.

S3 Carriage return character

Description Defines what ASCII character is used for carriage return (end-of-line).
Value Meaning
0-255 The ASCII value used for the carriage return character. The default value is 13 which

corresponds to an ASCII <CR>.

S4 Line feed character

Description Defines what ASCII character is used for linefeed.
Value Meaning
0-255 The ASCII value used for the linefeed character. The default value is 10 which

corresponds to an ASCII <LF>.

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S5 Backspace character

Description Defines what ASCII character is used for backspace.
Value Meaning
0-255 The ASCII value used for the backspace character. The default value is 8 which

corresponds to an ASCII <BS>.

S7 No Carrier timeout

Description S7 specifies the time to wait for carrier before hanging up and return NO CARRIER.
Value Meaning
0-255 The time to wait for carrier in seconds. The default value is 60. A value of 0 disables

checking for carrier.

S10 Lost carrier disconnect time

Description S10 specifies the time in tenths of a second before the modem hangs up in the case

of lost carrier.
Value Meaning
0-255 The time to wait before a loss of carrier causes the modem to hang ups. The default

value is 10 (1 second).

A value of 0 disables the checking for lost carrier.

S12 Escape sequence guard time

Description S12 specifies the maximum time in fiftieths of a second that can elapse between the

individual characters in the escape sequence to consider it valid.
Value Meaning
0-255 Maximum time between escape characters. The default value is 50 (1 second).

A value of 0 disables the guard time detection.

S14 Configuration bitmap

Description S14 is a bitmapped register that controls a wide range of modem properties:
Bit Default Meaning
0 N.A. Not used
1 1 Command echo.

A value of 0 means that echo disabled and corresponds to ATE0 .
A value of 1 means that echo enabled and corresponds to ATE1 .

2 0 Quiet mode.

A value of 0 means that the modem sends result codes and corresponds to
A TQ0.
A value of 1 means that the modem do not send result codes and

corresponds to ATQ1 .

3 1 Result codes.

A value of 0 means that the modem sends numeric result codes and
corresponds to ATV0 .
A value of 1 means that the modem sends text responses and corresponds

tO A TV1 .
4 N.A. Not used
5 N.A. Not used
6 N.A. Not used
7 0 Answer/Originate.

A value of 0 means answer mode and a value of 1 means originate mode.

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S21 Configuration bitmap

Description S21 is a bitmapped register and controls a wide range of modem properties.
Bit Default Meaning
0 0 Not used, implemented for compatibility reasons. Corresponds to A T&J.
1 N.A. Not used
2 1 RTS/CTS behavior .

A value of 0 means CTS always on and corresponds to AT&R0.
A value of 1 means that CTS tracks RTS and corresponds to AT&R1 .

3, 4 2 Result codes behavior.

A value of 0 means that the modem ignores DTR and corresponds to
A T&D0.

A value of 2 means that the modem disconnects and returns OK on loss of
DTR and corresponds to AT&D2 .

5 1 DCD behavior.

A value of 0 means that DCD is always active and corresponds to AT&C0.
A value of 1 means that DCD reflects true carrier status and corresponds to
A T&C1.

6 0 DSR behavior.

A value of 0 means that DSR is always active and corresponds to AT&S0 .
A value of 1 means that DSR is active when handshake begins and
corresponds to AT&S1 .

7 N.A. Not used

S22 Configuration bitmap

Description S22 is a bitmapped register and controls a wide range of modem properties.
Bit Default Meaning
0 N.A. Not used
1 N.A. Not used
2 N.A. Not used
3 N.A. Not used

4.5,6 7 Limit result codes.
A value of 0 corresponds to ATX0
A value of 4 corresponds to ATX1
A value of 5 corresponds to ATX2
A value of 6 corresponds to ATX3
A value of 7 corresponds to ATX4 (default)
(See ATX description of these settings.)

7 N.A. Not used

S30 Inactivity timer

Description S30 specifies the maximum time that a data connection will be maintained if no data

transfer occurs. The value is in tens of seconds.
Value Meaning
0 The inactivity timeout is disabled. This is the default value.
1-255 The maximum time to maintain a connection without any data transfer.

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S31 Configuration bitmap

Description S31 is a bitmapped register and controls a wide range of modem properties.
Bit Default Meaning
0 N.A. Not used
1 N.A. Not used
2, 3 2 Error correction progress messages control.

A value of 0 means that only DTE speed is shown and corresponds to
A TW0 (default).
A value of 1 means full reporting and corresponds to ATW1

A value of 2 means that only DCE speed is shown and corresponds to ATW2
4 N.A. Not used
5 N.A. Not used
6 N.A. Not used
7 N.A. Not used

S95 Negotiation message options

Description: S95 is a bitmapped register and enables variants of the CONNECT result code from

the modem. The settings in this S-register override the ATW command.
Bit Default Meaning
0 1 Link speed reporting.
1 1 ARQ reporting.
2 1 CARRIER reporting.
3 1 PROTOCOL reporting.
4 N.A. Not used
5 1 COMPRESSION reporting.
6 1 Enable all result codes. Just like ATX4 .
7 N.A. Not used

Error Codes

+CME ERROR Mobile equipment error

Description: This is the error code for +CME ERROR:
Error code Meaning
0 Phone failure
1 No connection to phone
2 Phone adaptor link reserved
3 Operation not allowed
4 Operation not supported
5 PH-SIM PIN required
10 SIM not inserted
1 1 SIM PIN required
12 SIM PUK required
13 SIM failure
14 SIM busy
15 SIM wrong
16 Incorrect password
20 Memory full
21 Invalid index
22 Not found

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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
100 Unknown

+CMS ERROR Message service error
Description: This is the error codes for +CMS ERROR.
Error code Meaning
0-127 GSM 04.11 Annex E-2 values
128-255 GSM 03.40 section 9.2.3.22 values
300 Phone failure
301 SMS service of phone 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 necessary
312 PH-SIM PIN necessary
313 SIM failure
314 SIM busy
315 SIM wrong
320 Memory failure
321 Invalid memory index
322 Memory full
330 SMSC (message service center) address unknown
331 No network service
332 Network timeout
500 Unknown error
512 Manufacturer specific error

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SoftGSM Kit

Chapter 6 - Troubleshooting

MultiMobile SoftGSM User Guide

Introduction

This chapter provides both general and specific tools for helping you solve operational problems with
your MultiMobile SoftGSM. The Frequently Asked Questions (FAQs) are provided as a general
problem solving tool; some more specific troubleshooting suggestions are then provided. The F AQs
are categorized below as:

• General FAQs

• Windows 95 FAQs

• Windows NT F AQs

Frequently Asked Questions (FAQs)

General FAQs

Q1. What is GSM ?
A1. GSM (Global System for Mobile communications) is the leading wireless digital technology in the

world, with networks operating in more than 120 countries and serving more than 155 million
subscribers. As a member of this global system, GSM carriers in North America are dedicated to
offering their subscribers the best wireless roaming system in the world.

Q2. What advantages does GSM offer over other digital technologies ?
A2. With GSM, wireless customers get the richest, proven, advanced digital technology available in

the marketplace today . GSM of fers a wider range of features and functionality than other emerging
technologies. GSM simplifies data transmission to allow laptop and palmtop computers to be
connected to GSM phones. GSM provides integrated voice mail, high-speed data, fax, paging and
short message services (SMS) capabilities. With GSM, customers get the advantage of the most
secure communications. GSM offers unparalleled call privacy and fraud prevention. As well as the
advantage of national and international roaming. In addition, GSM offers the best voice quality of any
digital wireless standard. Independent laboratory and field test reports validate near wireline parity .

Q3. How does GSM compare with existing analog cellular service ?
A3. GSM is far more advanced than traditional analog cellular technology still being used today by

many companies. A GSM user has access to services such as integrated voice, high speed data,
paging, fax and short message service, all from one network. And all through one handset. Only
GSM handsets incorporate a “smart” or “SIM card” which contains the subscriber’s personal
identification and service profile information such as billing, predefined speed dial numbers and
calling services.

Q4. Why did PCS providers in North America choose GSM ?
A4. They chose GSM because it is a proven technology that offers great flexibility in its features and

functions. In addition, subscribers eventually will be able to roam throughout the entire United States
and Canada with their phones, as well as roam through most of the world using the phone’s “smart”
card.

Q5. What is a “smart” card ?
A5. The SIM (Subscriber Information Module) card - a.k.a. “smart card” – holds all of a subscriber’s

personal information and phone settings. In essence, it is the subscriber’s authorization to use the
network. It also holds the phone number, personal security key and other data necessary for the
handset to function. The card can be switched from phone to phone, making the new phone receive

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Chapter 6 - Troubleshooting

all calls to the subscriber’s number. The SIM card is one of the security devices on the GSM
network, making it difficult to steal numbers or otherwise make fraudulent phone calls. The card also
allows for roaming with other GSM operators around the world. In addition, the card stores personal
phone numbers, missed calls, voice mail notifications, text messages, service center information, etc.
Furthermore, the card could be used for other purposes, such as a debit card, credit card, bus pass,
or other uses. The possibilities of SIM card technology are practically endless.

Q6. How do smart cards work ?
A6. The SIM (smart card) is inside each handset, and functions as its digital brain. It’s the SIM that

prevents your number from being stolen and your calls from being eavesdropped. The SIM’s digital
memory , which stores information like your rate plan and service features, also allows you to easily
personalize your service. The GSM standard provides the “brain” (smart card) of a PCS Mobile
Phone. It contains user ID and billing information that can be switched between different phones - so
calls can be made or received even when you’re not using your own phone.

Q7. Do smart cards come in more than one format ?
A7. Smart cards come in two formats. One version resembles a small chip and is semi-permanently

placed inside the phone. The second version is similar to a credit card and can be used in phones
equipped with a slot for the smart card.

Q8. How does the smart card help prevent fraud and “eavesdropping” ?
A8. In GSM networks, an encryption algorithm scrambles the digitized voice transmission between

the handset and the GSM transmission site. The information that is required to decode the encryption
is hidden within the smart card This feature provides the industry’s most effective prevention of radio­based eavesdropping and cloning fraud.

Q9. When did the first GSM network start providing commercial service ?
A9. The first GSM systems began commercial operation in 1991 in Europe. Since then, more than

250 wireless service providers around the world have selected GSM-based systems for their
advanced digital wireless communications networks. GSM is the most widely used digital standard in
the world today and now represents nearly 40 percent of the world’s total market for wireless
services.

Q10. How popular is GSM in the U.S. and Canada ?
A10. In North America, 24 PCS companies have selected GSM as their digital technology. One of

the biggest reasons was the belief that GSM would give them an advantage in time to market. The
first U.S. commercial broadband PCS service went on-line in the Washington and Baltimore markets
in late 1995 (it was a GSM company). And since day one, GSM had led the market in terms of
coverage and customers. Today, 15 GSM companies across the U.S. & Canada now provide
commercial service to about two million customers in more than 1,500 cities in 41 U.S. states, the
District of Columbia and four Canadian provinces. But GSM’s popularity isn’t limited to just North
America. T wo million new customers around the world are added every month. That’s one new
subscriber every second!

Q11 What benefits does GSM provide PCS customers ?
A11. With GSM, customers get the richest, proven, advanced digital technology available in the

marketplace today. GSM provides integrated voice mail, high-speed data, fax, paging and short
message services capabilities. With GSM, customers get the advantage of secure communications.
GSM offers unparalleled call privacy and fraud prevention. As well as the advantage of national and
international roaming. In addition, GSM offers the best voice quality of any digital wireless standard.
Independent laboratory & field test reports validate near wireline parity .

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MultiMobile SoftGSM User Guide

Q12. What advantages does GSM provide to PCS operators ?
A12. For many operators, “time to market” is a critical issue. GSM is a proven, established

technology with a track record of success in enabling operators to launch their service first in a
market. Manufacturing efficiencies and economies of scale also make this technology a robust, cost
effective investment for PCS operators that . One North American GSM operator estimates a 30
percent savings of more than $200 million in building out its PCS network.

Q13. How does GSM’s total system specification benefit operators and consumers ?
A13. Every aspect of the technology has been defined in the standard. As a result, GSM service

providers are the only PCS licensees which have the ability to interchange mobile infrastructure
equipment from a variety of manufacturers. Because it’s a proven network technology with multiple
suppliers, GSM generates economies of scale and development momentum. This translates into
speed to market — in a cost effective manner . The GSM family of standards is supported by regional
and international service providers and manufacturers which work diligently to ensure the evolution of
the technology.

Q14. What about roaming capabilities ?
A14. GSM architecture supports full-featured, seamless roaming between GSM systems in North

America. This inherent roaming capability allows operators to easily exchange common services,
billing records and location information. Today, there are 62 international roaming agreements signed
with other GSM operators around the world.

Q15. How does GSM provide more advanced services and functionality than other digital
technologies ?

A15. One of the objectives for the GSM-based platform was to offer advanced services and

functionality from a single network. To meet this goal, the designers made it part of the standard and
based the architecture on the Integrated Services Digital Network (ISDN) call model. GSM operators
have the flexibility of offering integrated voice, high speed data, fax and short message services
capabilities from one network. GSM also has the Intelligent Network (IN) functionality required to offer
advanced subscriber features needed for private virtual networks such as call forwarding,
abbreviated dialing, restriction on incoming or outgoing calls and call handling procedures based on
location or time of day . The versatility and advanced feature functionality of GSM allows operators to
be extremely creative and diverse with their marketing strategies and service offerings. As a result,
GSM customers have more minutes of use than do the traditional cellular phone user.

Q16. What about voice quality of GSM ?
A16. Excellent voice quality is one of the primary requirements for PCS subscribers. That is why the

GSM community worked to develop the 13 kbps Enhanced Full Rate (EFR) vocoder which provides
voice quality that is competitive with wireline service. The selection of the vocoder was a cooperative
effort between GSM service providers and equipment manufacturers. The goal was to select one
vocoder and to establish an open standard so that any manufacturer could produce the handsets.
This teamwork approach demonstrates the common commitment that the entire GSM community has
to the standardization and continuing evolution of this technology .

Q17. What is the GSM MoU Association ?
A17. GSM operators are also part of a bigger wireless network family of worldwide companies. On

an international level, the GSM MoU Association, is composed of the world¹s GSM network
operators, regulators and administrators. The GSM MoU Association exists to drive the promotion,
development and deployment of the GSM standard as the world¹s leading digital platform for global
mobile communications. As such, it addresses issues which collectively face members around the
globe.

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Q18. What is GSM North America, the North American Interest Group ?
A18. On a regional basis, the MoU Association forms special interest groups, like GSM North

America, the Association’ s North American Interest Group. This group’s purpose is to

• Promote the technology

• Identify/resolve compatibility , standards issues

• Cooperative efforts, common solutions

• Economies of scale, and

• Educate and inform

Q19. What is the GSM Alliance ?
A19. The North American GSM Alliance, L.L.C. Alliance is the first and only , all-digital wireless PCS

network of U.S. and Canadian carriers. The GSM Alliance was established in August 1997 to create a
North American network and develop seamless wireless communications for customers, whether at
home, away or abroad. The GSM Alliance’s collaborative efforts focus on serving the wireless
customer most efficiently by concentrating on such areas as roaming, customer care, national
distribution and data communications. While identifying themselves as GSM Alliance members,
individual companies continue to operate their own businesses and market under their own names.

Q20. What does MultiMobile SoftGSM require from your GSM network subscription?
A20. To use SMS and phonebook management nothing special is required. To use fax and/or data

this must be enabled in your subscription. Some operators separates incoming calls from outgoing
calls. This means that you might be able to send fax but not receive.

Q21. Does one MultiMobile SoftGSM license support only one GSM phone ?
A21. MultiMobile SoftGSM is installed for one specific handset on one specific port. This means that

MultiMobile SoftGSM can only handle one phone on one port at a time.

Windows 95/98 FAQs

Q22. When is MultiMobile SoftGSM for Windows 95 available ?
A22. The Windows 95 version is available today.

Q23. How do I use MultiMobile SoftGSM with Dial-Up Networking under Windows 95 ?
A23. To use MultiMobile SoftGSM for dialup networking (RAS) on Windows 95 you must install

support for this on your computer. Refer to your Windows documentation or online at Microsoft at:

http://support.microsoft.com/support/kb/ARTICLES/Q171/0

15.asp?PR=ALL&T1=1d&FR=0&A=T&T=T&S=F&

Windows NT FAQs

Q24. When is MultiMobile SoftGSM for Windows NT 4.0 available?
A24. The Windows NT 4.0 version is available today.

Q25. How do I use my MultiMobile card and MultiMobile SoftGSM with Dial-Up Networking
under Windows NT?
A25. To use MultiMobile SoftGSM for dialup networking (RAS) on Windows NT 4.0 you must install

support for this on your computer. How this is done can be found in your Windows documentation or
online at Microsoft at:

http://support.microsoft.com/support/kb/.../0/15.asp?PR=ALL&T1=1d&FR=0&A=T&T=T&S=f

Note to Windows NT users: You must have Administrator privileges to install MultiMobile SoftGSM.

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MultiMobile SoftGSM User Guide

Troubleshooting Procedures

The following symptoms are typical of problems you might encounter:

Modem does not respond to commands

Follow the suggestions on the Support Screen in the MultiMobile SoftGSM utility (Refer to Chapter 2).
Check the
between the application and the MultiMobile SoftGSM modem is logged to a file named
contents of the

Software does not detect the phone on the Com port during installation

1. Some newer laptops may have the Com ports disabled in the system BIOS. Refer to the vendor
documentation for instructions on enabling the Com ports.

2. It could be a cabling problem. The cable may be incorrectly installed or it may be the incorrect
cable for the particular phone. To verify, open Window’s Program | HyperTerminal | Session |
Using MultiMobile SoftGSM. Try issuing A T commands to see if you can talk to the device. If you
cannot, reinstall the drivers.

Data connection to the GSM network through Dial-up networking or other communications
program fails

1. Ensure that your phone service has data services activated.

Log modemconversation

log.txt

file can help you pinpoint operational problems.

checkbox in the MultiMobile SoftGSM utility; all conversations

log.txt

. The

2. Ensure that you are using MultiMobile SoftGSM as your modem in the Dial-up networking
session.

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Chapter 7 - Warranty, Service, and Technical Support

MultiMobile SoftGSM User Guide

Introduction

This chapter will provide you the resources for receiving service or support for your MultiMobile
SoftGSM. The chapter includes Multi-Tech’s license agreement, a description of the warranty, and
provides instructions for contacting the Service Department, Technical Support group, and various
Multi-Tech internet resources.

Software User License Agreement

SoftGSM software is licensed by Multi-Tech Systems, Inc. to the original end-user purchaser of the
product, hereafter referred to as “Licensee.” The License includes thhe distribution diskette, other
accompanying programs, and the documentation. The SoftGSM software, hereafter referred to as
“Software,” consists of the computer program files included on the original distribution diskette.

Licensee agrees that by purchase and/or use of the Software, he hereby accepts and agrees to the
terms of this License Agreement. In consideration of mutual covenants contained herein, and other
good and valuable considerations, the receipt and sufficiency of which is acknowledged, Multi-Tech
Systems, Inc. does hereby grant to the Licensee a non-transferable and non-exclusive license to use
the Software and accompanying documentation on the following conditions and terms:

The software is furnished to the Licensee for execution and use on a single computer system only
and may be copied (with the inclusion of the Multi-Tech Systems, Inc. copyright notice) only for use
on that computer system. The Licensee hereby agrees not to provide or otherwise make available
any portion of this software in any form to any third party without the prior express written approval of
Multi-Tech Systems, Inc.

Licensee is hereby informed that this Software contains confidential proprietary and valuable trade
secrets developed by or licensed to Multi-Tech Systems, Inc. and agrees that sole ownership shall
remain with Multi-Tech Systems, Inc.

The Software is copyrighted. Except as provided herein, the Software and documentation supplied
under this agreement may not be copied, reproduced, published, licensed, sublicensed, distributed,
transferred, or made available in any form, in whole or in part, to others, without expressed written
permission of Multi-Tech Systems, Inc. Copies of the Software may be made to replace worn or
deteriorated copies for archival or backup procedures.

Licensee agrees to implement sufficient security measures to protect Multi-Tech Systems, Inc.
proprietary interests and not to allow the use, copying or transfer by any means, other than in
accordance with this agreement. Licensee agrees that any breach of this agreement will be damaging
to Multi-Tech Systems, Inc.

Licensee agrees that all warranties, implied or otherwise, with regard to this Software, including all
warranties of merchantability and fitness for any particular purpose are expressly waived, and no
liability shall extend to any damages, including consequential damages, whether known to Multi-Tech
Systems, Inc. It is hereby expressly agreed that Licensee’s remedy is limited to replacement or refund
of the license fee, at the option of Multi-Tech Systems, Inc., for defective distribution media. There is
no warranty for misused materials.

This package contains 3.5-inch disks and/or CD-ROM discs. Neither this software nor the
accompanying documentation may be modified or translated without the written permission of Multi­Tech Systems, Inc.

This agreement shall be governed by the laws of the State of Minnesota. The terms and conditions of
this agreement shall prevail regardless of the terms of any other submitted by the Licensee. This
agreement supersedes any proposal or prior agreement. Licensee further agrees that this License
Agreement is the complete and exclusive statement of Agreement, oral, written, or any other
communications between Multi-Tech Systems, Inc. and Licensee relating to the subject matter of this
agreement. This agreement is not assignable without written permission of an authorized agent of
Multi-Tech Systems, Inc.

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MTSGSM

Limited Warranty

Multi-Tech Systems, Inc. (“MTS”) warrants that its products will be free from defects in material or
workmanship for a period of two years from the date of purchase, or if proof of purchase is not
provided, two years from date of shipment. MTS MAKES NO OTHER WARRANTY, EXPRESSED
OR IMPLIED, AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. This warranty does not apply to any
products which have been damaged by lightning storms, water, or power surges or which have been
neglected, altered, abused, used for a purpose other than the one for which they were manufactured,
repaired by the customer or any party without MTS’s written authorization, or used in any manner
inconsistent with MTS’s instructions.

MTS’s entire obligation under this warranty shall be limited (at MTS’s option) to repair or replacement
of any products which prove to be defective within the warranty period, or, at MTS’s option, issuance
of a refund of the purchase price. Defective products must be returned by Customer to MTS’s factory
transportation prepaid.

MTS WILL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES AND UNDER NO CIRCUMSTANCES WILL
ITS LIABILITY EXCEED THE PURCHASE PRICE FOR DEFECTIVE PRODUCTS.

On-line Warranty Registration

If you would like to register your MultiMobile SoftGSM electronically , you can do so at the following
address:

Chapter 7 - Warranty, Service, and T echnical Support

http://www.multitech.com/support/register.htm

Tech Support

Multi-Tech has an excellent staff of technical support personnel available to help you get the most out
of your Multi-Tech product. If you have any questions about the operation of this unit, call 1-800-972-

2439. Please fill out the MultiMobile SoftGSM information (below), and have it available when you
call. If your MultiMobile SoftGSM requires service, the tech support specialist will guide you on how
to send in your equipment (refer to the next section).

Recording MultiMobile SoftGSM Information

Please fill in the following information on your MultiMobile SoftGSM. This will help tech support in
answering your questions. (The same information is requested on the Warranty Registration Card.)

Model No.: _________________________
Software Version: ____________________

The model number is on the bottom of your MultiMobile SoftGSM.
Please note the type of external link device that is connected to your MultiMobile SoftGSM before

calling tech support. Also, note the status of your MultiMobile SoftGSM including LED indicators,
screen messages, diagnostic test results, problems with a specific application, etc. Use the space
below to note the status:

________________________________________________________________________________________________________
________________________________________________________________________________________________________
________________________________________________________________________________________________________
________________________________________________________________________________________________________
______________________________________________________________________________________________________________

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MultiMobile SoftGSM User Guide

Contacting Tech Support via E-mail

If you prefer to receive service on-line, via the Internet, you can contact Tech Support via e-mail at
the following address:

http://www.multitech.com/_forms/email_tech_support.htm

Service

If your tech support specialist decides that service is required, your MultiMobile SoftGSM can be sent
(freight prepaid) to our factory . Return shipping charges will be paid by Multi-Tech Systems.

Include the following with your MultiMobile SoftGSM:

• a description of the problem.

• return billing and return shipping addresses.

• contact name and phone number.

• check or purchase order number for payment if the MultiMobile SoftGSM is out of warranty.

(Check with your technical support specialist for the standard repair charge for your
MultiMobile SoftGSM).

• if possible, note the name of the technical support specialist with whom you spoke.

Send your MultiMobile SoftGSM to this address:

MULTI-TECH SYSTEMS, INC.

2205 WOODALE DRIVE

MOUNDS VIEW, MINNESOTA 55112

ATTN: SERVICE OR REPAIRS

You should also check with the supplier of your MultiMobile SoftGSM on the availability of local
service and/or loaner units in your area.

The Multi-Tech BBS

For customers who do not have Internet access, Multi-Tech maintains a bulletin board system (BBS)
that mirrors its FTP site. Information available from the BBS includes new product information,
product upgrade files, and problem-solving tips. The phone number for the Multi-Tech BBS is (800)
392-2432 (USA and Canada) or [phone] (international and local).

The BBS can be accessed by any asynchronous modem operating at 1200 bps to 33,600 bps at a
setting of 8 bits, no parity , and 1 stop bit (8-N-1).

To log on to the Multi-Tech BBS

1. Set your communications program to 8-N-1.

2. Dial our BBS at [phone] (USA and Canada) or [phone] (international and local).

3. At the prompts, type your first name, last name, and password; then press ENTER. If you are a
first time caller, the BBS asks if your name is spelled correctly. If you answer yes, a questionnaire
is displayed. You must complete the questionnaire to use the BBS on your first call.

4. Press ENTER until the Main Menu is displayed. From the Main Menu you have access to two
areas: the Files Menu and News. For help on menu commands, type ?.

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MTSGSM

To Download a file

If you know the file name

1. From the Main Menu, type F to access the Files Menu, then type D.

2. Enter the name of the file you wish to download from the BBS.

3. If a password is required, enter the password.

4. Answer Y or N to the automatic logoff question.

5. Select a file transfer protocol by typing the indicated letter, such as Z for Zmodem (the

recommended protocol).

6. If you select Zmodem, the transfer will begin automatically . If you select another protocol, you

may have to initiate the transfer yourself. (In most datacomm programs, the P AGE DOWN key
initiates the download.)

7. When the download is complete, press ENTER to return to the File Menu.

8. To exit the BBS, type G and press ENTER.

If you don’t know the file name

1. From the Main Menu, type F to access the Files Menu. For a list of file areas, type L, press

ENTER, then type L and press ENTER again. (If you do not type the second L, you will list all of
the files on the BBS.)

Chapter 7 - Warranty, Service, and T echnical Support

2. Mark each file area you would like to examine by typing its list number and pressing ENTER.

3. Enter L to list all the files in the selected file areas. Enter C to go forward in the file list and P to

go back.

4. To mark one or more files for download, type M, press ENTER, type the list numbers of the files,

and press ENTER again.

5. Enter D. You will see a list of the files you have marked. Enter E if you would like to edit the list;

otherwise enter D again to start the download process.

6. Select a file transfer protocol by typing the indicated letter, such as Z for Zmodem (the

recommended protocol).

7. If you select Zmodem, the file will transfer automatically . If you select another protocol, you may

have to initiate the transfer yourself. (In most data communications programs, the P AGE DOWN
key initiates the download.)

8. When the download is complete, press ENTER to return to the File Menu.

9. To exit the BBS, type G and press ENTER.

About the Internet

Multi-Tech is a commercial user on the Internet, and we retrieve messages from our customers on a
periodic basis. Multi-Tech’s presence includes a Web site at:

http://www.multitech.com

and an ftp site at:

ftp://ftp.multitech.com

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MultiMobile SoftGSM User Guide

About the Multi-Tech Fax-Back Service

Multi-Tech’s fax-back system provides 24-hour access to sales, marketing, and technical literature.
Dial 612-717-5888, follow the voice prompts, and request document number 10 for a catalog of
available documents. For convenience, have your fax number handy:
_________________________. From the catalog of available documents, you can order newsletters,
white papers, press releases, etc. from the sales and marketing index (pages 1-4), or order basic
modem operation and troubleshooting guides from the technical support and engineering index. Just
enter the applicable FB Doc. # from the left column of the catalog.

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Appendices

MultiMobile SoftGSM User Guide

Appendix A - Understanding GSM

Introduction

This appendix provides background information on GSM standards, data and applications. GSM is a
global standard for digital wireless communications, with extensive roaming capabilities for both voice
and data services. It has been commercially available since 1992.

GSM networks are currently operating in more than 120 countries worldwide which now (December,

1998) includes in excess of 155 million GSM subscribers worldwide.

GSM offers advanced mobile data capabilities, previously unavailable on analog cellular networks. It
offers mobile workers use anytime, anywhere which is unmatched by fixed telephone networks.
Wireless GSM data can be used for a wide range of applications including Email, Facsimile, Internet
access and Remote LAN Access.

GSM is uniquely-positioned to meet the mobile data needs of handheld computer users. Cooperation
between the GSM handset manufacturer and data solutions providers is key to developing reliable,
robust products. GSM data solutions work with all GSM networks (GSM 900, DCS 1800 and PCS

1900). The cost of using GSM data is dropping.

There are currently more than 200 licensed networks in over 120 countries around the world. This
allows for the provision of a wide range of services for both business and consumer user alike. GSM
offers higher quality speech (owing to its digital nature) and integrated data services for a wide range
of applications which can be used both domestically and internationally .

About GSM Data

GSM data provides the ability to send data or fax information over the GSM network. Data over GSM
offers new opportunities for both GSM network operators and mobile workers alike. By using GSM to
send and receive data or faxes, mobile workers have access to a level of geographic mobility
previously unobtainable. Currently , you can send data over the GSM network at speeds of up to 9.6
Kbps per second. Although this is notably slower than today’ s land line modems, ETSI 7 is continuing
to develop the GSM standard.

When you make a data call, simply dial the number to which you wish to send information. The GSM
network connects the user’s call to its Interworking Function (IWF), which then completes the call to
the remote terminal. In effect you are dialing the IWF, and then the IWF is dialing the remote terminal.
The IWF acts as a gateway, translating between the GSM set of protocols and the protocols used by
different types of networks. This allows a GSM network to connect to a range of different network
types, such as a POTS, ISDN or X.25 network. (See Figure below.)

Data can be transmitted once a connection between the mobile user and the remote terminal has
been established. Data can be sent over the GSM network in one of two modes: transparent mode or
non-transparent mode.

60

Figure B-1. Making a GSM Data Call

MTSGSM

Appendices

Transparent Mode

In transparent mode, a non error-corrected connection is established between the user and the
remote terminal. Data is then sent asynchronously . Because no error correction is taking place, there
is little delay (latency) in transmitting data over the link.

Non-transparent Mode

In non-transparent mode, a secure error-corrected link is established between the mobile terminal
and the remote modem. The connection between the mobile terminal and the GSM network uses the
Radio Link Protocol (RLP) for error correction. The IWF then establishes a connection to the remote
modem. Apart from having an error corrected link, there are two other main benefits to using non­transparent mode, these are:

• An increase in data throughput of approximately 20 percent

• Better call handling by the GSM network

Faxing

Sending a fax is similar to sending data. To send a fax, an initial call is made to the network. The call
is then routed through the network to the IWF. The IWF then establishes a connection to the remote
fax machine. The fax protocols are then passed end-to-end between the mobile terminal and the
remote fax machine. Fax data is transmitted synchronously and is not tolerant of any latency;
therefore Transparent mode must be used for Faxing.

GSM Data Benefits

For many years cellular communications have only been associated with voice communications, so
for many , using GSM network for data is a new concept. Many of the benefits derived from using
GSM data are similar to the benefits of using mobile phones. Some of the key benefits are outlined
below:

• Use anytime, anywhere. One major benefit of using GSM data is that you can use it from
any location at any time. There is no need to rely on being able to gain access to a POTS
(Plain Old Telephone Service) line, or wasting time trying to find one. Using GSM provides for
a faster response time for mobile employees. This is becoming an increasingly important
factor in countries where the POTS network is underdeveloped. When used this way , GSM
can provide a real competitive advantage to an organization. For example, sales people out
in the field can send information to relevant parties immediately . This can allow a company to
differentiate itself from its competitors, by its ability to respond to their customers needs in a
time frame that meets (or exceeds) their customers’ requirements.

• Ease of use for international travelers. Using the POTS in a foreign country can often prove
to be a daunting and complex operation. For example, the user needs to select the correct
telephone connector, ensure that the modem is approved for connection to the POTS within
that country , and deal with potential line quality and integrity issues for use over long
distances. All this can be side-stepped by using GSM, where the user is able to use their
equipment in the way they normally would. Using GSM in a foreign country can also prove to
be a more cost-effective solution for mobile data than a fixed network. Typically when staying
in hotels, calls are charged at a premium rate making data communications excessively
expensive. By using GSM users can actually achieve a cost advantage through bypassing
the premium charged by the hotel.

• Secure communications. A company’s information is sensitive and hence it is important that
the integrity of the information is not compromised. Sending data over the POTS network in
its analogue form is not secure. Only a very small number of modems are capable of
encrypting data, and these carry a significant price premium. Because GSM is a digital
technology , it is inherently more secure. As part of the GSM standard, both data and voice

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transmissions are encrypted for transmission across the network. This has been a key
strength for GSM providing peace of mind for users, without the need for additional
expenditure on expensive hardware and software.

• Quick call set-up. GSM was developed to interwork with the Integrated Services Digital
Network (ISDN). ISDN uses a technique known as rate adaptation to convert the slower
GSM data up to 64 Kbps ISDN data 12. As a result when a data call is made from a GSM
handset to an ISDN terminal adapter, the quick call set-up capability of ISDN can be utilized.
Typically, the call set-up time dialing into an ISDN TA is 3-4 seconds, as compared with
dialing into a V.34 modem which will average 35-40 seconds.

GSM Data Applications

With today’s relatively low data rate for GSM, the range of applications has been limited. However as
GSM’s data capabilities are enhanced, the range of applications for which it can be used will
increase. At present Email, fax and mobile Internet access are among the more popular applications.
To receive fax and data services to a handset, you will need to obtain a separate fax and data
number from your network operator.

• Mobile Internet access. The Internet is becoming increasingly important in the commercial
world. Having the ability to access the Internet from any location will become a vital tool for
mobile workers. Many GSM network operators are now developing dedicated Internet access
services, allowing users to dial into a virtual point of presence. Connection to the Internet is
typically over an ISDN link, which provides for quicker call set-up and clear-down. Although
Internet access over GSM may be slower than traditional landline Internet access, many web
pages now offer text only versions. Alternatively, users can normally configure their web
browser not to receive graphical images, thus decreasing the amount of time required for
downloading web pages.

• Remote database access. Remote database access is becoming an increasingly popular
application in the mobile data environment. Often sales people out in the field need up to the
minute information, such as pricing, stock details or financial information etc. By enabling
remote access to databases over GSM, information can be accessed almost immediately by
people away from the office. Many companies are now moving to provide access to
databases via the Internet, to take advantage of its local call rates.

• E-mail. The ability for mobile workers to send and retrieve electronic mail while away from
the office is now a necessity. GSM data users are able to send and receive E-mail in the
same way as they would, using a standard modem.

• Short Message Service (SMS). SMS is the method by which short text messages can be
sent or received by a GSM handset (in effect users can send GSM’s own version of E-mail to
each other). To use SMS, the user types the message by pressing the number pad of the
phone to correspond with a given letter (i.e. to type the letter b, you would press the number
2 twice). There are 2 main types of SMS services, point-to-point and cell broadcast. Point-to­point is for sending a short message of up to 160 characters to an individual subscriber. Cell
broadcast messages are up to 93 characters long, and are typically broadcasts from the
network operator to a number of subscribers. Instead of typing the message on the handset
itself, many users find it easier to use software that allows them to type the SMS message
using the PC keyboard. As with the general data services, ETSI has made a number of
revisions to the original SMS specification allowing a range of new services to be offered to
users. These include concatenated short messages, which provides for the sending of
multiple short messages to a user who can then reassemble the messages to create a large
message.

• File transfer and remote LAN access. Mobile users can use GSM to remotely connect to
their corporate LAN. With GSM digital technology, it can be more secure to use GSM as
opposed to traditional analog modems, especially if logging to the corporate LAN from a
different country. By default, all voice and data traffic sent across the GSM network is

62

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Appendices

encrypted. GSM uses special encryption keys, which are synchronized between the
Subscriber Identification Module (SIM) card and the GSM network. Most network operators
will provide corporate customers with dedicated connection into the corporate LAN, thus
bypassing the POTS network, and interconnection charges. If this connection is ISDN, then
the benefits of quick call set-up and tear-down can be utilized.

• Group 3 Fax. Using fax software, mobile users can send and receive faxes as if they are

actually in their office.

GSM Data Support

For any organization, supporting its information technology users is a key issue. This is especially
true for mobile workers who do not have full-time access to hands on help. Many of the support
issues for GSM data users will be the same as those for PC Card modem users. However, because
GSM data involves a number of different technologies working together , there are a number of
different companies to turn to for support when problems occur . Including the:

• GSM network operator

• Airtime service provider

• GSM handset manufacturer

• PC Card manufacturer

• Notebook manufacturer

• Software vendor

There are three key areas where problems are likely to be encountered for first time GSM data users:

• Installing the PC Card. As with any PC Card product, problems can be experience when first

installing the PC Card.

• Supporting the PC application. It is important to ensure that the software you wish to use

with GSM data is capable of working with GSM. Today the most popular software
applications will work with GSM data.

• Enable data for the handset. GSM data users require a separate data and fax number from

their voice number to let them receive data and fax calls. It is important to verify with your
airtime service provider or network operator that data has been enabled for the handset.

One of the key benefits of GSM data is the ability to ‘roam’ internationally. This can, however, present
new support issues for users. It is important to ensure that roaming agreements are in place for both
voice and data (some network providers have agreements that are for voice-only roaming). When
selecting a GSM data solution to be used for roaming, ensure that the vendor can provide a level of
worldwide support. This helps reduce the amount of time it takes to resolve any problems that occur
when roaming.

GSM uses a technique called Time Division Multiple Access (TDMA) to divide the radio channel into
8 different time slots, 7 for voice or data calls, and 1 channel for call progress and control information.
Under normal operation a voice or data call would use one of these time slots.

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GSM Statistics (Updated February , 99)

North American customers: 2 Million
Worldwide customers 155 Million
U.S. Companies with more than 100,000 customers 7
Worldwide networks with 100,000+ customers 68
N.A. Companies with active commercial GSM service 15
Countries with active commercial GSM service 120
GSM MoU Assn. Members 256
N.A. Companies Planning to Use GSM 24
Cities with Commercial Service (20,000+ POPS) 674
Cities with Commercial Service (50,000+ POPS) 252
Cities with Commercial Service (75,000+ POPS) 151
Cities with Commercial Service (100,000+ POPS) 1 1 4
U.S. States, D.C. and Canadian Provinces with
commercial service 38
Active Cell Sites 7,441
Employees 7,623
Total U.S. POPS 260 Million
Covered POPS in active markets to Date 136 Million
US PCS licenses to have GSM Service 427

Additional Facts

• GSM customer numbers area growing at a rate of 80 percent; One million signed up in 8
months

• GSM’s North American network is the 12th GSM system to exceed one million customers.

• GSM companies in North America are signing up customers at a rate of 137 an hour, two a
minute.

• Seven GSM companies in the U.S. have more than 100,000 customers. It took the entire
U.S. cellular industry more than 4 years to reach as many customers as GSM has added in
the past 12 months.

• More than 600 GSM cities activated in 12 months. The equivalent of nearly two new cities a
day.

• GSM carriers have built nearly 7,500 cell sites in two years (Entire U.S. cellular industry took
7 years)

• GSM carriers have created more than 7,500 new jobs in U.S. & Canada.

• Two million new GSM customers around the world are added every month - that’ s one new
subscriber every second!

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For More Information

Appendices

GSM Memorandum of Understanding (GSM MoU) at

The GSM MoU is the office association for GSM network operators. The GSM MoU website provides
a wide range of information on the geographic coverage of GSM around the world. Information is also
provided on the services and tariffs of each GSM operator worldwide.

GSM Alliance at

This web site provides a look at Global System for Mobile Communications (GSM), the premier
wireless digital technology in the world. This site is brought to you by the GSM Alliance, GSM North
America: the North American Interest Group of the GSM MoU Association, and the manufacturers of
GSM equipment in North America: Ericsson, Motorola, Nokia, Nortel, and Siemens.
For GSM in North America, E-mail

Mobile Data Initiative (MDI) at
The mobile data initiative (MDI) was formed to provide GSM hardware manufacturers with a forum for

discussion on how to promote the concept of GSM data, as well as hosting regular “Plug Fest” events
for testing GSM data products to ensure interoperability . The MDI web site provides information on
using and selecting GSM hardware, as well as case studies for companies already using GSM data.

GSM Data Knowledge Site at
The GSM Data web site provides a wide range of information on issues relating to GSM. It provides

links to journal articles (current and archived), using GSM data, supported and emerging utilities,
coming events, the future of GSM, etc.

Ericsson at

http://www.gsm-pcs.org

[e-mail]

http://www.pcsdata.com

http://www.gmsdata.com

http://www.ericsson.com/

http://www.gsmworld.com/gsmworld.htm

.

Ericsson is a leading developer of GSM products, and has a strong position in many different
geographic markets. Ericsson’s website has information on current GSM developments, and you can
subscribe to the Ericsson news service which automatically E-mails you the latest Ericsson press
releases for mobile communications.

Nokia at
Nokia is one of the world’s leading GSM handset and infrastructure manufacturers. Nokia’s website

provides information on GSM and current developments within the GSM industry . Nokia also
publishes white papers and conference speeches on GSM.

http://www.club.nokia.com/

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Glossary

MultiMobile SoftGSM User Guide

A

Analog: A method of signalling used to represent an infinite range of numbers. The most analog

devices are POTS telephones, and modems.
A T Command set: A set of instructions used to control modems and ISDN terminal adapters,

normally beginning with AT.

AT Command: An instruction sent to a modem, beginning with AT .

B

bps (Bits Per Second): A measurement of transmission speed.

C

CONCAT: Concatenated short messages provide for the sending of multiple short messages to a

user who can then reassemble the messages to create a large message

D

Data over GSM: The ability to transmit digital data over a GSM network.
Digital: A method of signalling that can only represent integers. For computers these are 0 and 1.
Dual-band Phone: A GSM phone that operates on two different bands (e.g., 900/1800 or 900/1900).

E

Error Correction: A method for identifying errors during data transmission and requesting re-

transmission of any corrupted data.
ETSI (European Telecommunications Standards Institute): The European standards body

responsible for defining and maintaining the GSM standard.

G

GPRS (General Packet Radio Services): A proposed packet data standard for GSM, capable of

providing data speeds up to 170 Kbps.

Group 3 Fax: An ITU standard for controlling facsimile communication.
GSM (Global System for Mobile Communication): An ETSI standard for digital wireless voice and

data communications.
GSM Data Interface: The interface on a GSM phone for connecting a serial cable to a PC or PC

Card.
GSM MoU (Memorandum of Understanding) Association: The GSM organization that oversees the

implementation of GSM networks around the world.

I

International Roaming: Outside North America, GSM users can roam seamlessly throughout

Europe, and in more than 60 other countries around the world. This provides a level of mobility
unmatched by any other cellular technology. GSM networks operate at different frequencies outside
North America, and as a result users roaming internationally may need to change the phone that they
are using. All a user needs to do is simply hire or buy the appropriate phone, and insert their existing
SIM card in to the phone (for an explanation of a SIM card see the following section), this is refered
to as “SIM Card Roaming”. Users will then be able to make and receive calls, as they would using
their normal phone. Many network operators now operate hiring schemes for their subscribers who
wish to roam internationally . Advances in phone technology will soon see the availability of phones
that can work on different frequencies. This will eliminate the need to change phones when travelling
outside North America.

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Glossary

ISDN (Integrated Services Digital Network): A replacement for the POTS system, providing digital

voice and data services. ISDN can provide simultaneous voice and data calls to different locations.
ISDN TA: ISDN Terminal Adapter, also referred to as an ISDN Modem. A digital device used to

connect to, and transmit data over, an ISDN digital telephone line.
ITU (International Telecommunications Union): Governing body for the many worldwide

telecommunications standards, including those for modems and ISDN.
IWF (Inter-working function): An essential part of any GSM network which handles interconnection

between the GSM network and fixed networks such as POTS or ISDN.

M

Modem (MOdulator/DEModulator): A device allowing computers to communicate over POTS lines.

N

National Roaming: Following the establishment of the GSM Alliance, af filiated network operators

can offer their subscribers nationwide roaming services through the United States and Canada. The
alliance provides for seamless roaming of both voice and data services. Apart from the 7 founder
members of the GSM Alliance, other GSM network operators in North America have shown support
for the Alliance, and will be invited to join the Alliance during 1998. Another benefit of the Alliance, is
the implementation of “61 1” as a customer support number. This allows users can gain support
regardless of the network they are using, or their location.

Non-transparent data: A method of transmitting data over a network where the network can identify
the data being sent, and can control the data session. In a GSM network the RLP protocol for error
correction is implemented for a non-transparent data session.

P

Packet Mode: A method of transferring data between two devices without the need to establish a

direct connection.
PC Card (previously PCMCIA): A device for connecting peripheral devices to a mobile computer.

Also the standard for such devices.
PCS (Personal Communications Services): A range of standards for digital wireless

communications operating in the 1850-1990 MHz frequency range. Services included high quality
digital voice, data, fax and two-way messaging services.

PDU (Protocol Data Unit): A coded and packetized unit of the SMS containing the message, receiver
address, and all parameters needed by the GSM network. The coding and packetizing can be done
in different ways as specified in GSM 03.38 and GSM 03.40. The MultiMobile SoftGSM user
application for sending SMS can packetize these PDUs in either 7-bit or 8-bit format (GSM 03.38).

POTS: The “Plain old Telephone System.”

R

Roaming: the ability for a subscriber to make and receive calls outside their home network. This is

one of the key differences between the first generation analog cellular networks and second
generation digital cellular networks such as GSM. To enable roaming, the network operator must
establish and implement a roaming agreement. Today some GSM network operators have in excess
of 60 international roaming agreements, spanning GSM 900, 1800 and 1900 networks. This allows
network operators to provide their customers with A worldwide service 5 unmatched by any other
cellular technology . When users are roaming either nationally or internationally, all their call and
service charges are billed to their home network. (Note: always check with your service provider to
ensure that they have the relevant roaming agreements. Many network operators will charge a
premium for roaming services. Also, consult your network operator for advice on roaming call
charges.)

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RLP (Radio Link Protocol): An error-correction protocol used by GSM.
Roaming: The ability to make and receive calls outside a user’s home cellular network.

S

SIM (Subscriber Information Module) card: also referred to as “Smart Card”. Stores information

about the subscriber, such as their telephone number. The SIM card fits inside a GSM phone, and
contains an individual subscriber’s personal information. The information contained on the SIM card
is used for identification and authentication of a subscriber by the GSM network, and hence acts as a
security key . The SIM card provides a high level of security, making it extremely difficult to make
fraudulent calls using GSM. To date, there have been no known cases of fraudulent use. The SIM
card also provides personal mobility for an individual, allowing them to access all of their personal
services (such as voice mail, call forwarding etc.) regardless of the phone that they are using. The
SIM card also provide a limited amount of local storage, which can contain names and telephone
numbers, missed call, SMS text messages, service center location, and notification information from
their network operator. Since a SIM card can be moved from phone to phone, you can easily change
or upgrade your phone, while retaining all of your personal information and phone number.

SMS (Short Message System): A text-based, 160-character, two way messaging system for GSM.

T

Transparent data: A method of transmitting data over a network, where the network does not

recognize the data being sent, and is not able to control the data session. For GSM, this method is
best for suited to situations where the data being sent cannot tolerate any latency, such as facsimile
applications.

V

V.42

bis

: An ITU standard for data compression.

V.110: An ITU standard for rate adaptation. Allow slow speed terminals (up to 19.2 Kbps) to connect
to an ISDN Terminal Adapter.

W

World Phone (Tri-band phone): A GSM term that represents a phone that can operate at 900, 1800

and 1900 MHz.

X

X.25: A standard for packet switched data networks.

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GSM Acronyms

The acronyms below are used in the GSM MoU (Memorandum of Understanding):

A

AAB Automatic Alternative Billing
AAC Authentication and Access Control
ABD ABbreviated Dialing
ABR Available Bit Rate
ACB Automatic Call Back
ACC Account Card Calling
ACTE Approvals Committee for Terminal Equipment
ANSI American National Standard Institute
AoC Advice-of-Charge
APC American Personal Communications

B

B-ISDN Broadband ISDN
BA Basic Access
BAIC Barring of All Incoming Calls
BAOC Barring of All Outgoing Calls
BER Bit Error Ratio
BIC-Roam Barring of Incoming Calls when roaming outside the Home PLMN Country
BOIC Barring of Outgoing International Calls

C

Glossary

CBR Constant Bit Rate
CCF 1. Call Control Function

CCH Control CHannel
CCIR Consultative Committee for International Radio (now ITU-R)
CCITT International Telegraph and Telephone Consultative Committee
CD Call Distribution
CDMA Code Division Multiple Access
CERT Service Provider / Terminal Manager certificate
CF Call Forwarding
CFB Call Forwarding on Mobile Subscriber Busy
CFU Call Forwarding Unconditional
CH Call Hold
CHA Call Hold with Announcement
CHALL A random number (see also RNDu, RNDT)
CIC Confidentiality and Integrity Control
CMIP Common Management Information Protocol
CMS Customer Management System
CNIP Calling Number Identification Presentation
CNIR Calling Number Identification Restriction
CNMA Customer Network Management Access
CON CONference Calling
CONP Connected Number Identification Presentation
CONR Connected Number Identification Restriction
CPE Customer Premises Equipment

2. Connection (call) Control Function

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CPIP Calling Party Identification Presentation
CPM Customer Profile Management
CPN Customer Premises Network
CPT Control Point Transfer
CPU Central Processing Unit
CRD Call Rerouting Distribution
CRG Customised Ringing
CS Capability Set
CT 1. Call Transfer

2. Cipher text for MT

3. Cordless Telephone
CTM Cordless Terminal Mobility
CUG Closed User Group
CW Call Waiting

D

DCPN Domestic Customer Premises Network
DCR Destination Call Routing
DECT Digital Enhanced (European) Cordless Telecommunication
DPE Distributed Processing Environment
DRAM Dynamic Random Access Memory
DS Direct Sequence
DTMF Dual Tone Multiple Frequency

E

EFS Error Free Seconds
EHIMA European Hearing Instruments Manufactures
EIA Electronic Industry Association
EIG European Interest Group
EII European Information Infrastructure
EIR Equipment Identity Register
EMC Electro-Magnetic Compatibility
ERM EMC and Radio Matters
ERP Equivalent Radiated Power
ETR ETSI Technical Report
ETS European Telecommunication Standard
ETSI European Telecommunications Standard Institute

F

FDD Frequency Division Duplex
FDMA Frequency Division Multiple Access
FE Functional Entity
FEC Forward Error Correction
FH Frequency Hop
FMA Frames Multiple Access
FMD Follow-Me Diversion
FPH Freephone
FSS Fixed Satellite Service

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G

GAP Call GAPping
GII Global Information Infrastructure
GMM Global Mobile Multimedia
GSMC Gateway Mobile services Switching Center
GoS Grade of Service
GPRS General Packet Radio System
GPS Global Positioning System
GRAN Generic Radio Access Network
GSM Global System for Mobile (Tele)communication
GSO Geostationary Satellite Orbit
GUI Graphical User Interface

H

H Hash function
HC Handover Criteria
HDML Handheld Device Mark up Language
HEC Header Error Control
HEO Highly-inclined Elliptical Orbit
HIPERLAN High Performance Radio Local Area Network
HLR Home Location Register
HOC Handover Control
HRS Home Location Register Subsystem
HSCSD High Speed Circuit Switch Data
HPLMN Home Public Land Mobile Network
HUP Handover User Profile

I

Glossary

IBCN Integrated Broadband Communications Network
ICO Intermediate Circular Orbit
ICSI International Charged Subscriber Identifier
ID Handover Initiation and Decision
IGP International Gateway Point
IM lncall Modification
IMSI International Mobile Subscriber Identity
IMTI International Mobile Terminal Identifier
IMUI International Mobile User Identity
IMUN International Mobile User Number
IN Intelligent Network
IP Intelligent Peripheral
IRID Intended Recipient IDentification Presentation
IS Interim Standard
ISC International Switching Center
ISDN Integrated Service Digital Network
ISL lnter-Satellite Links
ISO International Standards Organisation
ISSCC International Solid State Circuit Conference
I-STP International Signalling Transfer Point
IT Information Technology

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ITU International Telecommunication Union
ITU-R ITU Telecommunication Radio Sector
ITU-T ITU Telecommunication Standardization Sector
IUN International UMTS Number
IWF Interworking Function
IWU Interworking Unit

J

JDC Japan Digital Cellular

K

KAT Terminal session key
KAU User session key
KC Ciphering key
Kph Public home service provider key (public key schemes)
Kpm Public network key (public key schemes)
KPN Public network encryption key (public key schemes)
KPSP Public service provider authentication key (certified public key schemes)
KPT Public terminal authentication key (public key schemes)
KPU Public user authentication key (public key schemes)
Kpv Public visited service provider key (public key schemes)
Ksh Secret home service provider key (public key schemes)
Ksm Secret network key (public key schemes)
KSN Secret network encryption key (public key schemes)
KSSP Secret service provider authentication key (certified public key schemes)
KST Secret terminal authentication key (public key schemes)
KSU Secret user authentication key (Public key schemes)
Ksv Secret visited service provider key (public key schemes)
KT Terminal authentication key (secret key schemes)
KU User authentication key (secret key schemes)
KX Intermediate ciphering key (public key schemes)

L

LA Location Area; i.e. Location Area identity
LAI Location Area Identifier
LAJ Location Area Identifier
LE Local Exchange
LEI Local Exchange Identifier
LEO Low Earth-Orbit (Satellite)
LES Land Earth Station
LIM Call LIMiter (Service feature)
LOCM LOCation Management
LOG Call LOGging (Service feature)
LOS Line-Of-Sight (path)

M

M&PC Mobile & Personal Communications
MAC Medium Access Control layer
MAG Market Aspect Group
MAP Mobile Application Part
MAS MASs calling

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MBCF Mobile Bearer Control Function
MCCF Mobile Call Control Function
MCF Mobile Control Function
MCI Malicious Call Identification
MDRA Mobile DPE Bridge
MEF MEasurement Function
MEO Medium-attitude Earth Orbit
MESf Mobile Earth Station (fixed)
MF Mediation Function
MIPS Millions of Instructions per Second
MMC Meet-Me Conference
MMI Man Machine Interface
MN Message sent from Network
MoU Memorandum of Understanding
MRBC Mobile Radio Bearer Control
MRLC Mobile Radio Link Control
MRRA Mobile Radio Resource Allocation
MRRC Mobile Radio Resource Control
MRTR Mobile Radio Transmission and Reception
MS Mobile Station
MSC Mobile-services Switching Centre
MSCP Mobility and Service Control Point
MSf Mobile Station (fixed)
MSF Mobile Storage Function
MSS Mobile Satellite System
MT 1. Message sent from Terminal

2. Mobile Termination
MTRN Mobile Terminal Roaming Number
MUI Multimedia User Interface
MWC Mufti-Way Calling

N

Glossary

N Network
NAIG North American Interest Group
NEF Network Element Function
NP Network Performance
N-STP National Signalling Transfer Point
NTWK Network layer

O

OCS Originating Call Screening
OFA OFf net Access
ONC Off Net Calling
ONE ONE number
OS Operations System
OSF Operations System Functions
OSI Open Systems Interconnection
OSS Operations Support System

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P

P Processing
PABX Private Automatic Branch Exchange
PAI Paging Area Identifier
PC Personal Computer
PCH Paging CHannel
PCN Personal Communications Network
PCS Personal Communications Service
PDA Personal Digital Assistant
PDN 1. Public Data Network

PES Personal Earth Station
PHS Personal Handy Phone System
PHY PHYsical layer
PIN Personal Identification Number
PLMN Public Land Mobile Network
PM Physical Medium (sublayer)
PMR Private Mobile Radio
PMSN Public Mobile Satellite Network
PN Personal Numbering
PNP Private Numbering Plan
POTS Plain Old Telephone Service, residential type service
PRA Primary Rate Access, via PRI for ISDN
PRI Primary Rate Interface
PRM Premium Rate Services
PRMC Premium Rate charging
PS Personal Station
PSN Packet Switched Network
PSPDN Packet Switched Public Data Network
PSTN Public Switched Telephone Network
PTN Private Telecommunications Network
PTT Post Telegraphy and Telecommunications
PWT Personal Wireless Telecommunication

2. Packet Data Network

Q

QAF Q Adapter Function
QoS, QOS Quality of Service
QUE Call QUEuing

R

RA Radio Aspects
RACE Research and Development in Advanced Communications for Europe
RACE Research in Advanced Communications in Europe
RACH Random Access CHannel
RAS Radio Access System
RBC Radio Bearer Control
RCA Research & Development Centre for Radio Systems
REVC REVerse Charging
RF Radio Frequency
RFTR Radio Frequency Transmission and Reception

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RIC Radio Interface performance Group
RLAN Radio Local Area Network
RLC Radio Link Control
RMTI Random Mobile Terminal Identity
RMUI Random Mobile User Identity
RNDu, Random Number (See also RNDT and CHALL)
RNDT Random Number (See also RNDu and CHALL)
ROA Recognised Operating Agency (previously RPOA)
RRA Radio Resource Allocation
RRC Radio Resource Control
RSS Radio Subsystem

S

S-PCN Satellite - PCN
SAP Service Access Point
SAR Segmentation And Reassembly (sublayer)
SCAF Service Control Access Function
SCEF Service Creation Environment Function
SCF 1) Service Control Function

2) Selective Call Forwarding
SCF(M) Service Control Function (Mobile)
SCF-BY/DA Selective CF on Busy/Don’t Answer
SDCCH Stand alone Dedicated Control CHannel
SDF(M) Service Data Function (Mobile)
SEC Security screening
SECMOP SECurity Mechanisms and Operating Procedures
SERG Service Experts Rapporteur Group
SFMK Satellite Framework
SG Security Group
SIM Subscriber Identity Module
SMF Service Management Function
SMG Special Mobile Group
SN Multiple Subscriber Number
SNL Signalling Network Layer
SP Satellite Pager
SPID FPLMTS Service Provider IDentity
SPM 1) Service Profile Modification

2) Service Profile Management
SPV Service Profile Verification
SRF Specialised Resource Function
SSC Satellite Interest Group
SSF Service Switching Function
SSP Service Switching Point
STM 1. Synchronous Transfer Mode

2. Synchronous Transport Module

T

Glossary

TA Type Approval
TAA Type Approval Authority
TADIG Transfer Accounting Data Interchange Group

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TC 1. Traffic Control

2. Transmission Convergence (sublayer)
TCC Target Cells and Connections
TCH Traffic CHannel
TCRTR Technical Committee Reference Technical Report
TCS Terminating Call Screening
TDD Time Division Duplex
TDMA Time Division Multiple Access
TDR Time Dependent Routing
TE 1. Terminal Equipment

2. Transit Exchange
TFTS Terrestrial Flight Telecommunications System
TIA Telecommunication Industry Association
TINA Telecommunication Information Network Architecture
TMG TRAC Mobile Group
TMN Telecommunications Management Network
TMTI Temporary Mobile Terminal Identifier
TO Telecommunication Operator
TRAC Technical Regulatory Advisory Committee
TSC Technical Sub-Committee
TT Traffic Telematics
TWG Terminal Working Group

U

UAN Universal Access Number
UDP User Datagramm Protocol
UDR User-Defined Routing
UIM User Identity Module
UMTS Universal Mobile Telecommunication System
UNI User Network Interface
UPT Universal Personal Telecommunications
UPTN Universal Personal Telecommunication Number
USIM Universal Subscriber Identity Number
UTRA UMTS terrestrial Radio Access
UUI UMTS User Identity
UUM UMTS User Mobility
UUS User-to-User Signalling

V

VBR Variable Bit Rate
VC Virtual Channel
VHE Virtual Home Environment
VLR Visitor Location Register
VLSI Very Large Scale Integration
VMSC Visited Mobile services Switching Center
VOT TeleVOting
VP Virtual Path
VPI Virtual Path Identifier
VPLMN Visited Public Land Mobile Network
VPN Virtual Private Network

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W

WARC World Administrative Radio Conference
WLL Wireless Local Loop
WSF Work Station Function

Glossary

MTSGSM

79

MultiMobile SoftGSM User Guide

Index

A

About the Internet..................................................57

About the Multi-Tech Fax-Back Service ................58

Applications supported .......................................... 62

A T commands ....................................................... 30

B

BBS .......................................................................56

Bulletin Board System (BBS) ................................56

C

Cables provided by MultiTech .................................8

Cellular phone subscriptions ................................. 12

COM port, selecting ..............................................27

Commands supported ............................................. 8

Computers supported..............................................9

Contacting Tech Support via E-mail ...................... 56

Create a new phonebook ......................................24

Create a new phonebook entry .............................24

D

Data transmission support ......................................8

Delete a phonebook .............................................. 24

Delete a record......................................................24

E

Ericsson handsets supported.................................. 8

Error codes

+CME error ........................................................ 45

+CMS error ........................................................ 46

Extended A T commands .......................................35

F

Fax A T commands................................................. 34

Fax-Back Service .................................................. 58

Faxing ................................................................... 61

Frequently asked questions

General.............................................................. 48

Windows 95/98 .................................................. 51

Windows NT ......................................................51

G

GSM, background .................................................60

GSM data ..............................................................60

Applications .......................................................62

Benefits..............................................................61

Faxing................................................................ 61

Non-transparent mode.......................................61

Support ..............................................................63

Transparent mode .............................................61

GSM handsets supported .......................................8

GSM networks....................................................... 60

GSM statistics ....................................................... 64

GSM web sites ......................................................65

I

Internet ..................................................................57

IWF (Interworking Function).................................. 60

L

License agreement................................................16

Limited Warranty ...................................................55

On-line Warranty Registration ...........................55

Loading the software

Driver software .................................................. 16

Utility software ...................................................19

Logging on to Multi-Tech's BBS ............................ 56

M

Multi-Tech BBS......................................................56

Multi-Tech fax-back service ...................................58

Multi-Tech's web site ............................................. 57

MultiMobile SoftGSM

Installing the software ........................................16

Introduction .......................................................... 6

Kit contents........................................................ 12

Registration .......................................................18

Related documentation........................................ 7

Requirements ....................................................12

Service............................................................... 56

Setup .................................................................13

T echnical specifications ....................................... 8

Unpacking..........................................................12

N

Nokia handsets supported.......................................8

Non-transparent mode ..........................................61

O

On-line Warranty Registration............................... 55

Operating systems supported .................................8

Outgoing SMS messages, coding .........................27

80

MTASR1-100

Index

P

Phone-to-PC connection ....................................... 13

Phonebook file ......................................................27

Phonebook record................................................. 23

Phonebook Utility

Delete ................................................................24

New phonebook.................................................24

New record ........................................................24

Read phonebook ............................................... 25

Write phonebook................................................ 25

R

Radio Link Protocol (RLP).....................................61

Read phonebook ................................................... 25

Recording MultiMobile SoftGSM Information ........55

Registering your MultiMobile SoftGSM ................. 18

Result codes ......................................................... 33

S

S-Registers ........................................................... 42

Service .................................................................. 56

Service center ....................................................... 26

Servicing the MultiMobile SoftGSM.......................56

Settings information

COM port attached ............................................27

Log modemconversation ................................... 28

Phonebook file ................................................... 27

Service center.................................................... 26

Type of outgoing SMS ....................................... 27

Settings, SMS & phonebook .................................26

Short Message Service (SMS)..............................22

Short message service support...............................8

Siemens handsets supported..................................8

SIM card, defined ..................................................70

Smart card (SIM card)...........................................48

SMS Utility

Receiving SMS messages.................................22

Sending SMS messages ...................................23

Standard A T commands ........................................ 30

Storing phone numbers .........................................23

W

Web site, Multi-Tech .............................................. 57

Write phonebook ................................................... 25

T

TDMA (Time Division Multiple Access)..................63

Tech Support .........................................................55

Contacting Tech Support via E-mail................... 56

Recording MultiFRAD Information .....................55

T echnical specifications...........................................8

Technical support ..................................................55

Transparent mode................................................. 61

Troubleshooting procedures.................................. 52

MTASR1-100

81