Troubleshooting 15-15
COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED
Writer: Carey Gregg Saved by: Carey Gregg Saved date: 05/08/00 12:06 PM
Part Number: 170706-002 File name: Ch15.doc
Solving Modem Problems Continued
Problem Possible Cause Solution
No dial tone, with or without
NO DIAL TONE message.
You are not in your home
country and the modem
does not recognize the local
dial tone.
Refer to the “Travel
Connection Checklist” in
Chapter 6.
At the command line in
terminal mode, type
ATX3DT.
Telephone service is not
connected to the telephone
wall jack.
Connect a telephone to the
wall jack. If you do not hear
a dial tone, contact your
telephone service provider.
A shared telephone line is in
use.
Make sure another
telephone or modem is not
using the telephone line.
Modem is connected to a
digital line, such as an office
PBX line.
Connect the modem to a
standard analog telephone
line, then reestablish the
connection.
Speaker Control AT
Command (ATM) is set to 0.
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.
The modem or modem
COM port is disabled.
Refer to “Disabling a
Device” in Chapter 11.
The modem is not
responding to commands
from the computer
keyboard.
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
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