HP Compaq Presario X1001US, Compaq Presario X1002US, Compaq Presario X1010CA, Compaq Presario X1010US, Compaq Presario X1012QV Modem Command Guidelines

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Modem Command Guidelines

Compaq Notebook Series

Document Part Number: 316654-001

February 2003

This document provides instructions for selecting, accessing, and
using the AT command set supported by the modem in your
notebook.

© 2003 Compaq Information Technologies, L.P.

Compaq and the Compaq logo are trademarks of Compaq Information
Technologies Group, L.P. in the U.S. and/or other countries.

Compaq shall not be liable for technical or editorial errors or omissions
contained herein or for incidental or consequential damages in connection
with the furnishing, performance, or use of this material. The information
in this document is provided “as is” without warranty of any kind,
including, but not limited to, the implied warranties of merchantability and
fitness for a particular purpose, 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
Compaq Notebook Series
First Edition February 2003

Document Part Number: 316654-001

Contents

Modem Command Guidelines

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

Selecting a Command Set . . . . . . . . . . . . . . . . . . . . . . . 1

Identifying Your Modem. . . . . . . . . . . . . . . . . . . . . . . . 2

Accessing Your Command Set . . . . . . . . . . . . . . . . . . . 2

Using Commands on the Notebook . . . . . . . . . . . . . . . . . . . 2

Entering a Command . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Editing a Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Executing a Command. . . . . . . . . . . . . . . . . . . . . . . . . . 3

Repeating a Command. . . . . . . . . . . . . . . . . . . . . . . . . . 3

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

Setting the Result Code Format. . . . . . . . . . . . . . . . . . . 4

Setting Local Character Echo . . . . . . . . . . . . . . . . . . . . 4

Using Online Mode and Online Command Mode . . . . . . . . 5

Switching to Online Command Mode . . . . . . . . . . . . . . 5

Switching to Online Mode. . . . . . . . . . . . . . . . . . . . . . . 5

Creating a Command Mode Shortcut Icon . . . . . . . . . . 6

Modem Command Guidelines iii

Modem Command Guidelines

This guide provides instructions for selecting, accessing, and
using the AT command set supported by the modem in your
notebook.

For help with specific modem problems, go to the modem
manufacturer’s Web site, or refer to the Worldwide Telephone
Numbers booklet to contact a Compaq authorized dealer, reseller,
or service provider.

Accessing HyperTerminal

Modem commands can be entered in HyperTerminal, which is
included with all Microsoft Windows operating systems.

To access HyperTerminal:

■ In Windows XP Professional, select Start > All Programs >

Accessories > Communications > HyperTerminal.

■ In Windows 2000 Professional, select Start > Programs >

Accessories > Communications > HyperTerminal.

Selecting a Command Set

Command sets are modem-specific. To use modem commands
successfully, you must use the command set supported by the
modem in your notebook.

Modem Command Guidelines 1

Modem Command Guidelines

Identifying Your Modem

To display the model name of the modem in your notebook:

1. Select Start.

2. Right-click My Computer > Properties > Hardware tab >
Device Manager button.

3. Double-click Modems. (An icon and name for your modem
is displayed.)

4. Double-click the modem name icon. (The modem model
name is displayed.)

Accessing Your Command Set

After you identify the model name of your notebook, refer to
the modem manufacturer’s Web site to obtain an updated
command set.

Using Commands on the Notebook

Entering a Command

When entering modem commands on the notebook:

■ You must start every AT command line (except the A/ and

+++ commands) with the attention (AT) code characters. If
you do not begin the command line with the attention (AT)
code characters, the modem will not execute the command.

■ You must type the AT prefix in the same case (AT or at, not At

or aT).

■ You may type commands following the AT prefix in all

uppercase, all lowercase, or any combination of uppercase
and lowercase letters.

■ You may enter telephone numbers with or without

punctuation, for example, [phone] or 1234567890.

2 Modem Command Guidelines

Editing a Command

If you make an error while typing a command, backspace over the
error, then retype. You cannot backspace over the AT prefix
because it is interpreted immediately after it is typed.

Executing a Command

To execute a command line, press enter. (Pressing enter instructs
the modem to process the command line.)

Repeating a Command

To repeat the last command line issued, enter the A/ command.
When repeating the A/ command, it is not necessary to enter the

AT prefix or press enter, because issuing the A/ command repeats

the AT prefix and enter function.

The last command entered remains in the command buffer until
the modem is reset or power to the modem is turned off. Both
actions clear the buffer. The
buffer is clear.

Modem Command Guidelines

A/ command is invalid while the

Omitting a Parameter in a Command Line

If you enter a command that normally includes a numeric
parameter, such as ATHn, without entering the numeric parameter,
the value of the numeric parameter is assumed to be the default
parameter.

For example, the
parameter of zero (H0), which is the default, or of one (H1). If
neither parameter is entered, ATH plus enter is the equivalent of

ATH 0 plus enter.

This rule does not apply to the D (dial) command.

Modem Command Guidelines 3

Hn (hang-up) command can have a numeric

Modem Command Guidelines

Setting the Result Code Format

A result code is the response of the modem to a command. It may
be issued in either of two formats: words (the long form, also
known as verbose) or numeric characters (the short form,
represented by digits).

The result code format is set using the

■ Use V1 for words (default).

■ Use V0 for numeric characters.

Setting Local Character Echo

Local echo is a process that transmits received data back to the
sending station and allows you to see what data was received.
If your typing is not displayed on the screen, local echo is
turned off.

Local echo preferences are set using the

■ Use EO for no local echo.

■ Use E1 to enable local echo.

Vn command:

En command:

4 Modem Command Guidelines

Modem Command Guidelines

Using Online Mode and
Online Command Mode

Online mode is used for data transfer; online command mode is
used for entering commands.

Switching to Online Command Mode

To escape from online mode and enter online command mode,
press and hold

When you have correctly entered this escape command:

■ An OK result code is displayed.

■ The established connection is maintained, but input is

interpreted locally and not transmitted to the remote
connection.

Switching to Online Mode

To escape from online command mode and enter online mode,
use either of the following methods:

shift as you type +++.

■ Enter the ATO (letter “O”) command.

■ Terminate the connection with the ATH0 (digit “0”) command.

Modem Command Guidelines 5

Modem Command Guidelines

Creating a Command Mode Shortcut Icon

You can create a Windows shortcut icon for accessing
HyperTerminal in online command mode. To place a Command
shortcut icon on the Windows desktop:

1. Create a Command icon in HyperTerminal.

To access HyperTerminal:

✎

■ In Windows XP Professional, select Start > All

Programs > Accessories > Communications >
HyperTerminal.

■ In Windows 2000 Professional, select Start > Programs >

Accessories > Communications > HyperTerminal.

a. In the Name field, type:

Command

b. Select OK. (The Connect To dialog box is displayed.)

c. In the Connect Using field, select the COM port used by

your modem.

To identify the COM port used by your modem:

✎

■ In Windows XP Professional, select Start > Control

Panel > Printers and Other Hardware icon > Phone and
Modem Options icon > Modems tab.

■ In Windows 2000 Professional, select Start > Settings >

Control Panel > Phone and Modem Options > Modems.

d. Select OK. (The Port Settings tab is displayed.)

e. Select OK. (The command mode screen is displayed with

a flashing cursor in the upper left corner. The modem can
now receive a command and respond to the command
with a result code.)

6 Modem Command Guidelines

Modem Command Guidelines

f. Select File > Save. (A Command icon is created, but is

not visible until you exit HyperTerminal.)

g. To exit HyperTerminal, select File > Exit.

2. To access the Command icon:

h. In Windows XP Professional, select Start > All

Programs > Accessories > Communications >
HyperTerminal.

i. In Windows 2000 Professional, select Start > Programs >

Accessories > Communications > HyperTerminal.

3. To create a shortcut to the Command icon, select the
Command icon, then select File > Create Shortcut. (The
shortcut to the Command icon is displayed in the
HyperTerminal window.)

4. To place the shortcut icon on the desktop, select the shortcut
icon, then drag it to the desktop.

5. To exit and close HyperTerminal, select File > Exit.

Modem Command Guidelines 7