Hardware Problems
2-44
HP Servers Troubleshooting Guide
HP CONFIDENTIAL
Writer: Ted Weiman File Name: c-ch2 Hardware Problems.doc
Codename: Generic TSG Part Number: 161759-007 Last Saved On: 11/19/02 9:31 AM
Table 2-19: Modem Problems
continued
Problem Possible
Cause Possible
Solution
There is no response
when you type
AT commands.
There may be a conflicting port
address.
Reconfigure the COM port address for
the modem.
1. Be sure that 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.
3. Type the following at the command
prompt to reset the modem to
factory-default settings:
AT&F
4. Be sure that you are in terminal
mode and not MS-DOS mode.
Refer to the HP website for a complete
list of AT commands:
www.hp.com
The AT commands
are not visible.
The echo command may not
be properly set.
Set the echo command to On, using the
following AT command:
ATE
The modems that are
connecting are not compatible.
Be sure that both modems are operating
with the same settings, including speed,
data, parity, and stop bits.
Data is displayed as
garbled characters
after the connection
is established.
The software may not be set
for the correct terminal
emulation.
1. Reconfigure the software correctly.
2. Power down the server and restart.
3. Run the communications software,
checking settings and making
corrections where needed.
4. Restart the server and retry.
continued
