Compaq Armada M300 Series Reference Manual page 144

Solving Modem Problems
Problem
No dial tone, with or without
NO DIAL TONE message.
Continued
Possible Cause
You are not in your home
country and the modem
does not recognize the local
dial tone.
Telephone service is not
connected to the telephone
wall jack.
A shared telephone line is in
use.
Modem is connected to a
digital line, such as an office
PBX line.
Speaker Control AT
Command (ATM) is set to 0.
The modem or modem
COM port is disabled.
The modem is not
responding to commands
from the computer
keyboard.
Solution
Refer to the "Travel
Connection Checklist" in
Chapter 6.
At the command line in
terminal mode, type
ATX3DT.
Connect a telephone to the
wall jack. If you do not hear
a dial tone, contact your
telephone service provider.
Make sure another
telephone or modem is not
using the telephone line.
Connect the modem to a
standard analog telephone
line, then reestablish the
connection.
1. At the command line
in terminal mode, type
ATM1, then press
Enter .
2. Type ATH1 and listen
for the sound of the
dial tone.
Refer to "Disabling a
Device" in Chapter 11.
1. At the command
line in terminal
mode, type AT,
then press Enter.
n
If the modem
displays OK, the
modem and
computer are
working together.
n
If the modem
displays ERROR, or
does not respond,
restart the computer
and repeat steps 1
and 2.
2. Type ATDT and listen
for a dial tone.
3. Press any key to hang
up the modem.
Continued
Troubleshooting 15-15