HP ProLiant DL140 User Manual page 63

3. If no dial tone is detected, the phone line is not working. Contact the local
telephone company and arrange to correct the problem.
Modem does not connect to another modem
Action:
1. Be sure a dial tone exists ("No dial tone exists" on page 62).
2. Be sure the line is not in use at another extension before using it.
3. Be sure you are dialing the correct telephone number.
4. Be sure the modem on the other end is working.
No response occurs when you type AT commands
Action: Reconfigure the COM port address for the modem.
1. Be sure the communications software is set to the COM port to which the
modem is connected.
2. Check IRQ settings in the software and on the modem to be sure no conflict
exists.
3. Type AT&F at the command prompt to reset the modem to factory-default
settings.
4. Be sure you are in terminal mode and not MS-DOS mode.
5. Refer to the HP website (http://www.hp.com) for a complete list of AT
commands.
AT commands are not visible
Action: Set the echo command to On using the AT command ATE.
Data is displayed as garbled characters after the connection is established
Action:
1. Be sure both modems have the same settings, including speed, data, parity,
and stop bits.
2. Be sure the software is set for the correct terminal emulation.
a. Reconfigure the software correctly.
Troubleshooting 63