HP ProLiant DL140 ProLiant DL100 Series Servers User Guide - Page 45

Modem disconnects while online, Connection errors are occurring

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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. b. Restart the server. c. Run the communications software, checking settings and making corrections where needed. d. Restart the server, and then reestablish the modem connection. Modem does not answer an incoming call Action: 1. Enable the auto-answer option in the communications software. 2. Be sure an answering machine is not answering the line before the modem is able to answer. a. Turn off the answering machine. or Reconfigure the auto-answer option to respond in fewer rings than the answering machine. b. Restart the server, and then reattempt the connection. Modem disconnects while online Action: 1. Be sure no loose connections (on page 17) exist. 2. Be sure no line interference exists. Retry the connection by dialing the number several times. If conditions remain poor, contact the telephone company to have the line tested. 3. Be sure an incoming call is not breaking the connection due to call waiting. Disable call waiting, and 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: 1. Check the maximum baud rate for the modem to which you are connecting, and then change the baud rate to match. 2. If the line you are accessing requires error control to be turned off, do so using the AT command AT&Q6%C0. 3. Be sure no line interference exists. Retry the connection by dialing the number several times. If conditions remain poor, contact the telephone company to have the line tested. Troubleshooting 45

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Troubleshooting 45
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.
b.
Restart the server.
c.
Run the communications software, checking settings and making corrections where needed.
d.
Restart the server, and then reestablish the modem connection.
Modem does not answer an incoming call
Action
:
1.
Enable the auto-answer option in the communications software.
2.
Be sure an answering machine is not answering the line before the modem is able to answer.
a.
Turn off the answering machine.
or
Reconfigure the auto-answer option to respond in fewer rings than the answering machine.
b.
Restart the server, and then reattempt the connection.
Modem disconnects while online
Action
:
1.
Be sure no loose connections (on page
17
) exist.
2.
Be sure no line interference exists. Retry the connection by dialing the number several times. If
conditions remain poor, contact the telephone company to have the line tested.
3.
Be sure an incoming call is not breaking the connection due to call waiting. Disable call waiting,
and 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
:
1.
Check the maximum baud rate for the modem to which you are connecting, and then change the
baud rate to match.
2.
If the line you are accessing requires error control to be turned off, do so using the AT command
AT&Q6%C0
.
3.
Be sure no line interference exists. Retry the connection by dialing the number several times. If
conditions remain poor, contact the telephone company to have the line tested.