Multi-Tech Systems MT128ZLX-NT - Manual (Page 238)

MultiMobile MT128ZLX User Guide Appendix C: Troubleshooting
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Troubleshooting
Problem/Cause/Solution Dialogue
This chapter provides general and specific problem solving steps. Below is a number of examples of
Problems (P:),
Causes (C:), &
Solutions (S:).
If your MultiMobile is not working properly, look up the problem and solution here; if unsuccessful, call
Tech Support (see Chapter 7). At the end of this chapter we present some specific steps for resolving IRQ
and COM port conflicts.
P: When running Applications Programs (APs), system reports “Open
port fail”.
S: Windows 95 suddenly shows “Open port fail” because the MultiMobile is in use by other APs.
Terminate the other APs and try again.
S: Enter the Run! ISDN configuration utility, check the currently active API shown at the
bottom of the Utility Manager’s main screen, and make sure the AP uses the consistent
API with the current active mode. If not, select the appropriate API for the AP.
S: If VCOMM API is used, check if the AP’s COM port setting is consistent with the COM
port setting in Windows 95’s System properties.
S: If none of the above solutions resolve the prob-lem, uninstall the MultiMobile and install it
once again.
P: No Response to AT Commands
C: The COMx port for which the TA is set may be conflicting with another card.
S: Change the COMx port of MultiMobile to a different unused port. It might be best to set it
to COM3 or COM4. Even if you are not using a serial port which is set to the same
COMx port as the MultiMobile, it can still interfere. Be sure to update your software
COMx port setting as well.
C: The Interrupt that the MultiMobile is using may be the same Interrupt another card is
using.
S: Change the IRQ settings to a different, unused, IRQ. Even if you are not using a serial port
which is set to the same IRQ as the MultiMobile, it can still interfere with the TA.
S: Type AT&F and press <Enter>, then type AT again, the MultiMobile should respond with
an OK message. Otherwise, uninstall the MultiMobile, and reinstall it.
P: The TA Does Not Execute the Command Line
C: Make sure you type ‘AT’ at the beginning of command line (and press Enter at the end).