Modem Command Guidelines.pdf

Modem Command Guidelines

(Advanced Users Only)

Compaq Notebook Series

Document Part Number: 267638-001

April 2002

This document, designed for programmers, software engineers,

system administrators, and other advanced users, provides

guidelines for working with modem commands.

Compaq, the Compaq logo, Evo, and Presario are trademarks of Compaq

Information Technologies Group, L.P. in the U.S. and/or other countries.

Microsoft and Windows are trademarks of Microsoft Corporation in the U.S.

and/or other countries.

All other product names mentioned herein may be trademarks of their respective

companies.

Compaq shall not be liable for technical or editorial errors or omissions

contained herein. The information is provided “as is” without warranty of any

kind and is subject to change without notice. The warranties for Compaq

products are set forth in the express limited warranty statements accompanying

such products. Nothing herein should be construed as constituting an additional

warranty.

Modem Command Guidelines

(Advanced Users Only)

First Edition April 2002

Document Part Number: 267638-001

Contents

Modem Command Guidelines

Accessing HyperTerminal . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Entering a Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Identifying the Modem Type . . . . . . . . . . . . . . . . . . . . . . . . 2

Editing and Executing a Command . . . . . . . . . . . . . . . . . . . 3

Omitting a Parameter in a Command Line . . . . . . . . . . . . . 3

Repeating a Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Understanding Result Codes . . . . . . . . . . . . . . . . . . . . . . . . 4

Using Online Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Escaping from Online Mode to Online Command Mode . . 5

Creating a Command Mode Shortcut. . . . . . . . . . . . . . . . . . 5

Modem Command Guidelines (Advanced Users Only)

iii

Modem Command Guidelines

Accessing HyperTerminal

An easy way to issue commands to the modem is via

HyperTerminal, included with Microsoft Windows operating

systems. To access HyperTerminal:

1. If you are using Windows 98, Windows 2000, or

Windows Me, select Start > Programs > Accessories >

Communications > HyperTerminal.

2. If you are using Windows XP Home or XP Professional,

select Start > All Programs > Accessories >

Communications > HyperTerminal.

Entering a Command

administrators, and other advanced users should access or use

modem commands. For help with modem problems, refer to the

Modem and Networking guide on this CD or contact your Compaq

authorized dealer, reseller, or service provider.

When using AT commands, start every command line (except

the A/ and +++ commands) with the attention ( AT ) code

characters; otherwise, the modem will not execute the

command.

Modem Command Guidelines (Advanced Users Only)

Ä CAUTION: Only programmers, software engineers, system

Use the following guidelines when issuing modem commands:

■

Modem Command Guidelines

■

Type commands following the AT prefix in uppercase or

lowercase letters or a combination of both.

■

Always type the AT prefix in the same case (not At or aT ).

■

Enter telephone numbers with or without punctuation; for

example, (123) 456-7890 or 1234567890.

Identifying the Modem Type

To verify which manufacturer’s modem is included with your

notebook, follow these steps:

Windows 98:

1. Right-click My Computer > Properties > Device Manager.

2. Double-click Modems.

3. Double-click the drop-down icon and verify the modem

manufacturer listed on the General tab.

Windows 2000 Professional:

1. Right-click My Computer > Properties > Hardware tab >

Device Manager button.

2. Double-click Modems.

3. Double-click the drop-down icon and verify the manufacturer

listed on the General tab.

Modem Command Guidelines (Advanced Users Only)

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