AT&T 7506 User manual

555-021-734
Issue 1
October 1992
National Integrated Services
Digital Network (ISDN-1)
7506 and 7507 Asynchronous Data Module
Standard ISDN-1 User’s Manual

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NOTICE
While reasonable efforts were made to ensure that the information in this document was complete and
accurate at the time of printing, AT&T can assume no responsibility for any errors. Changes or
corrections to the information contained in this document may be incorporated into future reissues.
TO ORDER COPIES OF THIS MANUAL
Call:
Write:
Order:
AT&T Customer Information Center on 1 800 432-6600
In Canada Call 1 800 255-1242
AT&T Customer Information Center
2855 North Franklin Road
P.O. Box 19901
Indianapolis, IN 46219
National Integrated Services
Digital Network (ISDN-1)
7506 and 7507 Asynchronous Data Module
Standard ISDN-1 User’s Manual
Document No. 555-021-734Issue 1, October 1992
FCC NOTICE
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant
to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.
TRADEMARK NOTICE
5ESS is a registered trademark of AT&T.
Bellcore is a registered trademark of Bell Communications Research.
DEFINITY is a registered trademark of AT&T.
Hayes is a registered trademark of Hayes Microcomputer Products Inc.
Prepared by
AT&T Product Documentation 1992 AT&T
Development Group All Rights Reserved
Middletown, New Jersey 07748 Printed in U.S.A.
1

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IMPORTANT SAFETY INSTRUCTIONS
When using your telephone equipment, the following safety precautions should always be
followed to reduce the risk of fire, electric shock, and injury to persons.
Read and understand all instructions.
Follow all warnings and instructions marked on the telephone.
This telephone can be hazardous if immersed in water. To avoid the possibility of electrical
shock, do not use the telephone while you are in the bathtub or shower, or when you are wet.
If you accidentally drop the telephone into water, do not retrieve it until you have first
unplugged the line cord from the modular wall jack. Do not reconnect the telephone until it
has dried thoroughly.
Avoid using the telephone during electrical storms in your immediate area. There is a remote
risk of electric shock from lightning. Urgent calls should be brief. Even though protective
measures may have been installed to limit electrical surges from entering your home or
business, absolute protection from lightning is impossible.
If you suspect a natural gas leak, report it immediately, but use a telephone away from the
area in question. The telephone’s electrical contacts could generate a tiny spark. While
unlikely, it is possible that this spark could ignite heavy concentrations of gas.
Never push objects of any kind into the telephone through housing slots since they may
touch hazardous voltage points or short out parts that could result in a risk of electric shock.
Never spill liquid of any kind on the telephone. If liquid is spilled, however, dry
immediately, and refer any service problems to service personnel.
Slots and openings in the housing and the back or bottom of the telephone are provided for
ventilation to protect it from overheating; these openings must not be blocked or covered.
The openings should never be blocked by placing the telephone on a sofa, rug or other
similar surface. This product should not be placed in a built-in installation unless proper
ventilation is provided.
The telephone should be operated only from the type of power source indicated on the
marking label. If you are not sure of the type of power supply being used, contact a qualified
service person.
Do no allow anything to rest on the cord(s). Do not locate this product where the cord(s) will
be abused by persons walking on it.
Do not overload the AC wall outlets and extension cords as this can result in risk of fire or
electric shock.
Before cleaning, disconnect all cords from the telephone. Do not use liquid cleaners or
aerosol cleaners. Use a damp cloth for cleaning.
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Disconnect the cords on the telephone and refer servicing to qualified service personnel
when these conditions exist:
when the cord or plug is damaged or frayed.
if liquid has been spilled into the telephone.
if the telephone has been exposed to rain or water.
if the telephone does not operate normally by following the operating instructions.
(Do not attempt to adjust any controls other than those described in the User’s Manual.
Doing so may result in damage and require extensive work to restore the product to
normal operation.)
if the telephone has been dropped or the housing has been damaged.
if the product exhibits a distinct change in the performance.
SAVE THESE INSTRUCTIONS
When you see this warning symbol on the product, refer to the instructions
booklet packed with the product for information before proceeding.
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Contents
ffffffffffffffffffffffffffffffffffffff 1Introduction
Introduction 1-1
Data Features 1-2
The System Administrator: An Important Note
to All Users 1-3
On the ISDN Network: An Important Note on
System Dependencies 1-3
Organization of the User’s Manual 1-4
ffffffffffffffffffffffffffffffffffffff 2Getting Started
Getting Started 2-1
Communicating With The ADM 2-1
Setting Critical Options To Make a Data Call 2-2
Making a Data Call 2-5
ffffffffffffffffffffffffffffffffffffff 3Using the CMD and AT Commands
Using the CMD and AT Commands 3-1
When to Type Commands 3-1
Using CMD Local Mode Commands 3-2
Using AT Local Mode Commands 3-8
ffffffffffffffffffffffffffffffffffffff 4Data Options and Profiles
Data Options and Profiles 4-1
Data Option Definitions 4-3
Data Option Profiles 4-17
Typical Data Option Settings for Data Transfer 4-23
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Testing 5-1

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6Technical Information
Technical Information 6-1
EIA-232-D Lead Operation 6-1
Packet Assembler Disassembler (PAD)
Capabilities 6-3
Messages on the Voice Terminal or the
Attached Data Terminal Displays 6-6
ffffffffffffffffffffffffffffffffffffff 7Troubleshooting
Troubleshooting 7-1
Use of the Data ZAP Command to Clear a
Locked-up ADM 7-1
Use of the Self-Test to Clear a Locked-up ADM 7-2
ffffffffffffffffffffffffffffffffffffff AAppendix A — Cause Code Tables
Appendix A — Cause Code Tables A-1

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Introduction
Congratulations on the addition of an Asynchronous Data Module (ADM) to your AT&T
Integrated Services Digital Network (ISDN) set. Following our tradition of excellent quality and
high reliability, the ADM is designed to provide you with the latest in telecommunications
technology (Figure 1-1).
Voice and Data
(with ADM)
EIA-232-D
Interface Voice Only
(without ADM)
657E
657E
FIGURE 1-1
Rear View of Terminal with and without ADM
AT&T’s ISDN voice terminals, with the addition of the ADM, provide you with simultaneous
voice and data communications capabilities in one unit. As a telephone, the ISDN voice terminal
offers programmable buttons, fixed feature buttons, and a message indicator. The addition of the
ADM allows attached data terminals or personal computers to send and receive data through an
ISDN network. This user’s manual applies to AT&T’s first National ISDN product, referred to as
Standard ISDN-1 (SI-1).* SI-1 is the firmware that supports the National ISDN-1 service
offering. The ISDN 7506 and 7507 terminals are fully compliant with the requirements specified
in the Customer Premises Equipment (CPE) guidelines document, BellcoreSR-NWT-001953,
Generic Guidelines for ISDN Terminal Equipment on Basic Access Interfaces .
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* SI-1 is compatible with National ISDN-1 switches.
FP-3 was designed for use with ADM on 5ESS Custom ISDN.
FP-1 and FP-2 were designed for use with ADM 1 hardware.
SI-1 or FP-3 can be installed into an older FP-1 or FP-2 (ADM 1) set if the ADM 1 circuit board is replaced with
an ADM 2 circuit board.
Introduction 1-1

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Data Features
Asynchronous full-duplex operation at data rates from 1200 bits per second (bps) to
57.6 kilobits per second (kbps) through an EIA-232-D interface.
X.25 packet switched data communication including receipt of X.29 commands from a
remote X.25 host for setting packet switched data parameters.
Circuit switched data communication over 56 or 64 kbps facilities via industry standard
V.120 rate adaption protocol.
Circuit switched data communication over 64 kbps facilities via AT&T’s Digital
Multiplexed Interface (DMI) Mode 2 or Mode 3 rate adaption protocols.
A user friendly command interface with on-screen help, nine programmable named data
memory numbers, and four programmable data option profiles.
A standard AT command set interface for compatibility with applications which require this
command format.
Remote and local loopback tests.
Voice Terminal Control Features
With ADM and Standard ISDN-1, your ISDN set also features the Application Programming
Interface (API). This interface allows PC communications software to be used to enhance the
operability of your ISDN set. For example, the API allows a PC communications package
complete control of your ISDN set, from dialing a voice call to answering a voice call.
Some of the many things an application program running in a PC can accomplish through the
API include:
A ‘‘call screening’’ feature that examines the calling party number and uses a distinctive ring
based on who is calling. This allows prioritization of your incoming calls.
An automated personal phone book that looks up the number and places a call to the
specified person. The application also puts any notes about the person being called on the
computer screen so it provides the information you need when you need it.
An automated data lookup that identifies an incoming call and searches for any data
available on the caller. The information is available on a timely basis so you are
knowledgeable about the incoming call when you answer the telephone.
An automatic redial feature that will retry a busy telephone number and signal you when the
call goes through so you do not have to waste time constantly redialing.
An automatic conference feature will set up a conference between several parties without the
inconvenience of looking up several numbers and placing several calls.
A variable call forwarding feature prompts the user for a name, retrieves the number from a
database, and activates call forwarding to that number.
Any of these things, and more, could be happening simultaneously with a data call.
For more information on this interface refer to the Integrated Services Digital Network (ISDN)
Application Programming Interface (API) Programmer’s Reference Manual, 533-705-200
(Custom ISDN and SI-1, Issue 2). You can order copies of this manual by calling the AT&T
Customer Information Center at 1 800 432-6600.
1-2 Introduction

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The System Administrator: An Important Note to
All Users
Throughout this manual, we ask you to speak to your ‘‘system administrator.’’ In your company,
it is the person who has been given overall responsibility for all the ISDN terminals as well as the
system. His or her title may vary from business to business. It may be ‘‘systems manager,’’
‘‘telecommunications manager,’’ ‘‘data communications manager,’’ or something unique to your
company.
We recommend you write down the name and the phone number of your system administrator.
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PHONE: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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On the ISDN Network: An Important Note on
System Dependencies
Your ADM is intended for use with the AT&T 5ESSswitch, and any other switch that supports
the National ISDN-1 platform.* Both X.25 packet switched data communication and circuit
switched data communication are supported by these systems. For X.25 packet switched data,
the system supports either dialed-up data calls (X.25 virtual circuit) or a permanent connection
(X.25 permanent virtual circuit). Your ADM supports only one data call at a time, either circuit
or packet switched.
Your ADM rate adapts circuit switched data calls onto 56 or 64 kbps channels. This is true
regardless of the asynchronous data rate of the EIA-232-D interface. Therefore communication
circuit switched data directly between two ISDN networks requires digital connectivity between
the switching systems.
Your ADM will work with all National ISDN-1 switches. Your SI-1 ADM only supports one
Service Profile Identifier (SPID). Some National ISDN-1 switches require two SPIDs for voice
and circuit switched data (CSD) communications. On these switches, it is recommended you
only use X.25 D-channel packet switched data (PSD) communications until this restriction is
lifted. AT&T 5ESS supports both CSD and PSD with only one SPID.
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* Bellcore has published the following requirements on National ISDN-1:
1. Bellcore SR-NWT-001953, Generic Guidelines for ISDN Terminal Equipment on Basic Access Interfaces
2. Bellcore SR-NWT-001937, National ISDN-1
Introduction 1-3

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Organization of the User´s Manual
This manual is arranged into the following chapters.
Chapter 1: Introduction
Chapter 2: Getting Started — Explains how to set some data options from the keypad and
how to make a data call.
Chapter 3: Using the CMD and AT Commands— Explains when to type commands, and
how to use CMD and AT Local Mode Commands.
Chapter 4: Data Options and Profiles— Gives definitions of data options used to set up
your ADM and explains how to create data profiles.
Chapter 5: Testing — Describes local and remote loopback test procedures.
Chapter 6: Technical Information — Provides reference-type material for technical
personnel.
Chapter 7: Troubleshooting — Provides information on using the Data ZAP command and
the self-test to clear a locked-up ADM.
Appendix A: Cause Code Tables — Provides cause messages that may occur during data
call set-up.
Conventions of this Manual
The following conventions are used in this manual:
Items in rounded boxes (for example, RETURN ), represent buttons and keys to be pressed.
Information to be entered by the user on the data terminal keyboard, for example, commands
or command options, appear in this font:
DIAL 3784 .
The touch-tone keys on the voice terminal are referred to as the keypad.
Messages appearing on the terminal display or the data terminal screen are shown in this
font: Quit?
If the manual instructs you to type H for help, dial when you are making a data call, and so
forth, you can type any and all information in either lowercase or uppercase — whichever
you find easier.
Items in italics, such as nnn, represent numeric variables.
1-4 Introduction

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Getting Started
This chapter explains how to prepare your Asynchronous Data Module (ADM) for data
operations and how to make data calls.
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Communicating With The ADM
You can ‘‘talk’’ to the ADM through an attached data terminal by means of commands typed
on the terminal’s keyboard. There are two types of commands that can be used to talk to the
ADM: CMD and AT. CMD is the preferred method of talking to the ADM. However, if you
have a personal computer and you are using a communications package, you may need to use
AT commands because that may be the only command form the package understands. A
more detailed explanation of these commands can be found in Chapter 3, ‘‘Using the CMD
and AT Commands.’’
To use the commands, you must be communicating directly with the ADM in what is called
‘‘local mode’’ (Figure 2-1). In local mode, characters entered at the data terminal keyboard are
read, interpreted, and acted on by the ADM. This is in contrast to the ‘‘data mode,’’ in which the
ADM passes data from your terminal to your host computer or other data endpoint.
Data Terminal
or
Personal Computer
ISDN Telephone ISDN Network Host or Other
Data Equipment
Local Mode
Data Mode
FIGURE 2-1
Local and Data Mode Operation
Getting Started 2-1

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Local Mode
In local mode, commands typed at the data terminal keyboard are read, interpreted, and acted
upon by the ADM to make and end data calls as well as to modify data option values. There are
two varieties of local mode: local-idle and local-data. The ADM is in local-idle mode whenever
no data call has been initiated. The ADM goes into local-data mode when an established data
call is temporarily suspended by a user who wants to view or modify option values or disconnect
a call.
Data Mode
In the data mode, data from your data terminal or PC is exchanged with a host computer or other
data endpoint without interpretation by the ADM.
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Setting Critical Options To Make a Data Call
The ADM is shipped to you with default data option settings. Depending on your particular
needs, you may need to change some of these options. This section briefly describes the four
most important data options —local mode, data mode, speed, and parity, and explains how to set
them from your ISDN set keypad. If you are unable to successfully transmit data after following
the procedures in this section, refer to Chapter 4, ‘‘Data Options and Profiles’’ for complete
information on each of the options.
You can also set these options and additional data options from an attached data terminal or PC
keyboard. These additional options may allow you to specify more precisely the configuration
which best suits your needs. For information on setting data options from an attached terminal,
see the CMD Set and Program command descriptions in Chapter 3, ‘‘Using the CMD and AT
Commands.’’
Data Mode, Local Mode, Speed, and Parity Options
The data mode option setting determines whether the outgoing calls you make will use X.25
packet switched data on the ISDN D-channel or one of several other data protocols circuit
switched on an ISDN B-channel. (For incoming calls, your ADM automatically adapts to the
data protocol in use by the compatible calling endpoint.) The D-channel X.25 packet switched
option value is DX25. The B-channel circuit switched data mode option values are: B2 (factory
setting), BA, BV64U, BV64I, BV56U, and BV56I.
Select D-channel X.25 packet switched data (DX25) for packet switched data connections.
Select B-channel AT&T Mode 2 (B2) or B-channel AT&T Mode 3/2 Adaptive (BA) for
connectivity over 64 kbps facilities to endpoints supporting only one or both of these
protocols.
2-2 Getting Started

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Select B-channel V.120 protocol (BV64U, BV64I, BV56U, and BV56I) for connection to
equipment supporting this newer industry standard protocol. Select BV64I for error
corrected (I-frame) mode or BV64U for uncorrected (UI-frame) mode connections over
64 kbps facilities. Select BV56I for error corrected (I-frame) mode or BV56U for
uncorrected (UI-frame) mode connections over 56 kbps facilities.
The data mode option setting must correspond to the capabilities administered on your ISDN
telephone line. Contact your System Administrator for information on the proper setting of this
option. For more detailed information on data mode, refer to the Mode option in the Data Option
Definitions section of Chapter 4, ‘‘Data Options and Profiles.’’
The local mode option lets you select which form of commands and responses your ADM will
use after it is powered up. Local mode option values are CMD, AT, Enhanced AT, and Off.
Select CMD (factory setting) for the most user friendly interface with on-screen help.
Select AT if your PC communications package requires the use of an AT command set.
Select Enhanced AT only if you are using a PC communications package intended for use
with the AT&T ISDN Telephone Application Programming Interface. Enhanced AT mode
allows your PC to monitor and control all aspects of your ISDN voice and data telephone
service. For more information on Enhanced AT, refer to the Integrated Services Digital
Network (ISDN) Application Programming Interface (API) Programmer’s Manual,
533-705-200.
Select Off to disable the ADM from accepting commands and issuing responses through the
Electronic Industries Association (EIA) interface. The Off mode is useful when your ADM
is connected to a receive-only device, such as a printer.
Set the speed option to the highest speed compatible with your data terminal or PC
communications package. Speed option values range from 1200 bps to 57.6 kbps. The factory
setting is 9.6 kbps.
Set the parity option to match the requirements of your data terminal or PC communications
package. Parity option values are odd, even, mark, or space. If your data terminal or PC
communications package does not require a particular parity, set the parity option to ‘‘space’’
(factory setting).
The factory settings (default settings) may work for you. If these settings are not correct for your
particular set-up, follow the steps in the following sections to change them.
Setting Options on the 7506 or 7507 Display Sets*
With the ISDN 7506 or 7507 set, you may find it easier to follow the instructions on the set’s
display.
1Press Select . The green lamp comes on.
Note: This button may be labeled Shift/Select on older sets.
Getting Started 2-3

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2Press DATA/SEND/OFF . No additional lamps come on.
Follow the instructions on the set’s display as described below.
3Press # to view the options or * to change any of the options.
If you are viewing the options, press # to continue stepping through the display of
all the options. Press * to quit once you have viewed the options. (When viewing
the options, the currently active values are displayed.)
If you are changing options, press * to change the currently displayed option value
until the desired value is displayed, press # to save the value. Press 0 to skip to
the next option without making a change. (When changing the options, the values
initially displayed are the power-up values. These values may not be the same as the
currently active values.)
After you have made your last selection, the ISDN set stores and activates your
selections and automatically exits the program mode.
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* If you are upgrading an ISDN 7505 terminal (without display), refer to the Integrated Services Digital Network
(ISDN) Terminal Installation and Test Manual , 555-021-101.
2-4 Getting Started

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Making a Data Call
You can use the keypad of your ISDN set to initiate a data call, or you can initiate it from your
data terminal or PC. If you initiate the call from your data terminal or PC, you can use CMD
commands or AT commands. Check the documentation for your PC communications package to
determine if you need to use AT commands. The procedures for all three methods follow.
Making a Data Call from the ISDN Set
1Turn on your data terminal or PC.
If you are using a PC, make certain your communications software is configured
properly at the speed and parity you want to use.
2Press DATA/SEND/OFF .
The red lamp comes on.
3Dial the telephone number on your ISDN set keypad.
4Press DATA/SEND/OFF again.
The red lamp stays on and the green lamp blinks.
Supplementary circuit switched data features may require the entry of additional dialing
information prior to completion of the connection. To facilitate the use of these features,
the ADM allows you to dial additional digits and send them to the network by pressing
DATA/SEND/OFF . Depending upon the network’s response to the initial dialed digits, you
may or may not receive a CONTINUE message on the 7506 or 7507 display.
Once the computer at the other end answers, both lamps remain on during the data call.
5To end a data call press DATA/SEND/OFF .
Red and green lamps go off.
6To redial the last data call, press DATA/SEND/OFF followed by REDIAL .
Making a Data Call From a Terminal or PC Using CMD Local
Mode Commands
The Local Mode option must be set for CMD Local Mode. See the Setting Options To Make a
Data Call section earlier in this chapter.
1Turn on your data terminal or PC.
If you are using a PC, make certain your communications software is configured
properly at the speed and parity you want to use. The CMD: prompt should appear
on your terminal screen.
Note: If the CMD: prompt does not appear on your data terminal or PC, the speed and
parity options in your ADM may not be matched to your data terminal or PC. Press
BREAK on your terminal keyboard followed by the letters
AT and RETURN . If the
CMD: prompt still does not appear, the autoadjust option on the ADM may not be set
to ON, or you may be in AT local mode. Refer to the definition of Autoadjust in
Getting Started 2-5

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Chapter 4, ‘‘Data Options and Profiles’’ for more information. To exit AT local
mode and return to the CMD local mode, type:
at&&t . Refer to the Changing from
AT Local Mode to CMD Local Mode section in Chapter 3, ‘‘Using the CMD and
AT Commands’’ for more information.
2At the CMD: prompt, type dial and the telephone number.
For example, type
dial 5552222 .
Note: When dialing, type:
dial ; then one (and only one) space; then the number. Strict
adherence to this format is necessary. For example, typing
dial , two spaces, and
the string results in the second space being transmitted as the first character in the
dialed string.
3Press RETURN . The response of the ADM will be similar to what is shown below.
CALLING 555 2222
Type E to end call:
Supplementary circuit switched data features may require the entry of additional dialing
information prior to the receipt of the CONNECT message. To facilitate the use of these
features, the ADM allows you to enter additional dial commands before the CONNECT
message. Depending upon the network’s response to the initial dialed digits, you may or
may not receive a CONTINUE message after the initial dial command.
Additional information may appear on your screen, such as:
CONNECT - MODE 2
FAR END SPEED - 9600
OR
CONNECT
DATA MODE
Once you see the CONNECT message, you should ignore the Type E to end call until
you end the session.
You are now ready to communicate with the far end. Enter data to be transmitted.
4To end a data call, do one of the following:
press DATA/SEND/OFF
OR
rapidly type the Attention sequence:
+++ (see the description of the Attention option in
Chapter 4, ‘‘Data Options and Profiles’’).
The CMD: prompt is displayed.
Type
e or end to end the call.
5To redial the last data call, at the CMD: prompt, type redial followed by RETURN .
2-6 Getting Started

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Making a Data Call From a Terminal or PC Using AT Local
Mode Commands
The Local Mode data option must be set for AT Local Mode. See the the Setting Options To
Make a Data Call section earlier in this chapter.
1Turn on your data terminal or PC.
If you are using a PC, make certain your communications software is configured
properly at the speed and parity you want to use.
2Type atd and the telephone number. For example, type atd 1234567
3Press RETURN . The response of the ADM will be similar to what is shown below.
CONNECT 9600
Supplementary circuit switched data features may require the entry of additional dialing
information prior to the receipt of the CONNECT message. To facilitate the use of these
features, the ADM allows you to enter additional ATD commands before the CONNECT
message. Depending upon the network’s response to the initial dialed digits, you may or may
not receive a CONTINUE message after the initial dial command.
Conventional Hayes compatible applications abort data call attempts which have not yet
connected upon receipt of any character. One consequence of allowing secondary dial
commands is that in order to terminate (abort) such a call attempt, you must issue an ATH
(hangup) command rather than typing any character.
You are now ready to communicate with the far end. Enter data to be transmitted.
4To end a data call, do one of the following:
press DATA/SEND/OFF
OR
rapidly type the Attention sequence:
+++ (see the description of the Attention option in
Chapter 4, ‘‘Data Options and Profiles’’).
The OK prompt is displayed.
Type
ath to end the call
Getting Started 2-7

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Using the CMD and AT Commands
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When to Type Commands
You can only type commands using the data terminal keyboard to dial calls, program, and
maintain your system when your ADM is in Local Mode. When your ADM is in CMD Local
Mode or AT Local Mode, you are not transmitting data; your ADM is interpreting and acting
upon the instructions you type. If your Local Mode is set to CMD, then your terminal displays
the CMD: prompt while you are in Local Mode. AT Local Mode does not display
any prompt.
If you are on a data call, you can move to Local Data Mode by typing the attention sequence
+++ (default attention value) rapidly. The CMD: prompt or an OK response should appear on
your screen depending on the Local Mode you have selected.
Using the CMD and AT Commands 3-1

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Using CMD Local Mode Commands
This section provides a list of the CMD commands, has information on getting on-screen help
with commands, and procedures for using the commands.
To execute a command, type the command, then press RETURN . You must press RETURN
to execute a command.
If you make an error while typing, use BACKSPACE to correct it before pressing RETURN ,
or hold down the key labeled CTRL and type
x , to cancel the command line.
TABLE 3-1
CMD Commands, Their Abbreviations and Descriptions
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Command Abbreviation Description
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Returns the ADM to Data Mode from the
Local Data Mode
continue con
Used to save active profiles, change a profile,
store the last data number dialed
copy cop
dial d Dials a data call
end e Ends a data call
help h Displays Help menus
program p Used to program profiles and data repertories
Dials the last data number dialedredial r Sets a data option to a value in the active
profile (pA)
set s
Enables local loopback or remote loopback teststest t Used to display a profile or a data repertory
number
view v
Used to invoke the AT Local Mode&&h &&h
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3-2 Using the CMD and AT Commands