Appendix A - Troubleshooting; Modem Does Not Respond To Commands - Multitech MT9234ZPX-UPCI User Manual

If your modem is not operating correctly, check the following before contacting Technical Support.
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Modem does not respond to commands

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Modem cannot connect when dialing
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Modem disconnects while online
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Modem cannot connect when answering
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File transfer is slower than it should be
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Data is being lost
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Garbage characters on the monitor
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The modem doesn't work with Caller ID
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Fax and data software can't run at the same time
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Voice functions don't work
Modem Does Not Respond to Commands
1. Verify that you are sending commands through data communications software, either manually in terminal
mode or automatically by configuring the software. You cannot send commands to the modem from the DOS
prompt.
2. Verify you are in terminal mode in your data communications program, then type E1 and press Enter.
If you get an OK response from your modem, your connections are good and the problem likely is in the
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connection setup in your communications software.
If you don't get an OK, confirm that your port is properly configured the port through your
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communications program. Some communications programs disconnect without exiting the program. If
this is the case, try issuing the software's connection command. If more than one communications
program is open, they may conflict with each other. Make sure all other communications programs are
closed, and then try to make the connection again.
3. Make sure the COM port you chose during setup matches the COM port set in your communications software.
4. Another expansion card, such as a sound or game card, might use the same COM port, memory address, or
interrupt request (IRQ) as your modem. Look for conflicts with other devices installed on your computer.
Resources are assigned at power-up by the computer's BIOS. If the resources assigned to the MultiModem
conflict with the resources of another device, change the resources of the second device. Change the port
used by the conflicting device to resolve the conflict. Refer to the device's documentation to determine if you
need to change switches or jumpers on the conflicting device.
5. If you have another Multi-Tech modem, try swapping modems. If the problem goes away, contact Technical
Support at https://support.multitech.com
MultiModem ZPX UPCI/PCIe User Guide
Appendix A – Troubleshooting
for assistance.
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