HP ProLiant DL120 User Manual page 81

Be sure you are in terminal mode and not MS-DOS mode.
4.
Refer to the HP website (http://www.hp.com) for a complete list of AT commands.
5.
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:
Be sure both modems have the same settings, including speed, data, parity, and stop bits.
1.
Be sure the software is set for the correct terminal emulation.
2.
Reconfigure the software correctly.
a.
Restart the server.
b.
Run the communications software, checking settings and making corrections where needed.
c.
Restart the server, and then reestablish the modem connection.
d.
Modem does not answer an incoming call
Action:
Enable the auto-answer option in the communications software.
1.
Be sure an answering machine is not answering the line before the modem is able to answer.
2.
Turn off the answering machine.
a.
or
Reconfigure the auto-answer option to respond in fewer rings than the answering machine.
Restart the server, and then reattempt the connection.
b.
Modem disconnects while online
Action:
Be sure no loose connections (on page 53) exist.
1.
Be sure no line interference exists. Retry the connection by dialing the number several times. If
2.
conditions remain poor, contact the telephone company to have the line tested.
Be sure an incoming call is not breaking the connection due to call waiting. Disable call waiting, and
3.
then reestablish the connection.
AT command initialization string is not working
Action: Use the most basic string possible to perform the task. The default initialization string is
AT&F&C1&D2&K3.
Connection errors are occurring
Action:
Check the maximum baud rate for the modem to which you are connecting, and then change the baud
1.
rate to match.
Troubleshooting 81