Compaq Armada 7400 Reference Manual page 97

After setting up your software, you are ready to start using your
modem. In most cases, if you are using communications and fax
software, the modem will be controlled by the software and you
will not need to use the AT command set. Simply select the
internal modem as the preferred communication device in your
application.
The maximum connection speed on a call is determined by
the speed of the slowest modem on the connection. Your modem
will automatically negotiate the fastest possible speed with the
remote modem.
The internal modem is configured to meet operating approval in
the country where you purchased your computer. If the modem is
used in other countries during travel, the country selection setting
for the modem needs to change to meet the telecommunications
regulations for that country.
The Country Select Application (CSA) lists all of the countries for
which the modem contains configuration information. To confirm
that the modem has been approved for use by the
telecommunications agency in the desired country, check the
approvals label on the bottom of the computer. Or, for the most
up-to-date information, refer to the Compaq Internet website at
www.compaq.com.
The internal modem supports specific countries that are included
in the selection list.
When the Home Country and Current Country selections in
the CSA do not match, you will be prompted each time the system
restarts to confirm that the Country setting still reflects where the
modem is being operated at this time. To disable these reminders,
change the Home Country selection in the CSA to match the
Current Country. The Current Country setting should always be
set to the country in which the modem is currently being operated.
1. Selct Start Æ Settings Æ Control Panel Æ System icon.
2. Select the Device Manager tab.
3. Select the modem icon, then select your modem.
4. Select the Country Setting for Modem tab, then select the
country from the List of Countries.