
MultiMobile User Guide
Introduction
This chapter provides general and specific problem solving steps. Below are a number of examples of Problems (P:), Causes (C:), and Solutions (S:). If your MT5634ZLX/FE is not working properly, look up the problem and solution here; if unsuccessful, call Tech Support. At the end of this chapter, there are some specific steps for resolving IRQ and COM port conflicts.
P:No Response to AT Commands
C:
S:
C:
S:
P:The Modem Does Not Execute the Command Line
C: Make sure you are typing ‘AT’ at the beginning of command line (and hit Enter at the end).
C: Make sure the modem is not in Data Mode. Type +++ if necessary.
C: Make sure your software is set to the same COMx port as your MT5634ZLX/FE.
P:The Modem Does Not Give a Response After an AT Command Was Executed
C: The echo and/or responses may be turned off by the ATE0Q1 commands. Enable the AT&V1 to check Result Codes.
S: Use ATE1Q0 then Enter to change them back.
C: Make sure the modem is in Command Mode and not Data Mode when you type the AT command.
P:The Modem Gives an ‘ERROR’ Response After an AT Command was Executed
C:Make sure you did not type an invalid command.
C: Make sure your command line is 40 characters or less.
P:The Modem Goes Off-Hook and Disables the Telephone Line.
C:The modem may be set to
S: Disable
P:The Modem Does Not Auto-Answer the Phone
C: If necessary, make sure the software is configured to
A: To set
P:The Software Does Not Control the Modem Properly or Can Not Detect the Modem
S:Make sure the software was set up correctly. Check the initialization string and dial string.
C: Some TSRs (programs that stay in memory after they are loaded) may conflict with the communications software.
S: Try starting your computer without loading any TSRs.
52 | MT5634ZLX/FE |