Introduction; None Of The Indicators Light; The Modem Does Not Respond To Commands - Multitech MT5634MU User Manual

MultiMobile USB User Guide

Introduction

Your modem was thoroughly tested at the factory before it was shipped. If you are unable to make a
successful connection, or if you experience data loss or garbled characters during your connection, it
is possible that the modem is defective. However, it is more likely that the source of your problem lies
elsewhere. The following symptoms are typical of problems you might encounter:
• None of the LEDs light when the modem is on.
•

The modem does not respond to commands.

• The modem dials but is unable to make a connection.
• The modem disconnects while online.
• The modem cannot connect when answering.
• The modem doesn't work with Caller ID.
• Fax and data software can't run at the same time.
If you experience problems, please check the following possibilities before calling Technical Support
(see Appendix

None of the Indicators Light

When you plug in the modem, the operating system detects and configures the modem, and the TR
LED should come on.
If the TR LED does not come on, check to see that the software from the MT5634MU Installation CD
has been installed (see Chapter 2, Step 2: Installing the Modem).
The Modem Does Not Respond to Commands
• Make sure you are issuing the modem commands from the 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.)
• Make sure you are in terminal mode in your data communications program, then type AT and
press ENTER. If you get an OK response, your connections are good and the problem likely is
in the connection setup in your communications software.
• Try resetting your modem by unplugging the USB cable from the modem, and then plugging it
back in.
•
Try rebooting the computer.
• The modem might be defective. If you have another Multi-Tech modem, try swapping modems.
If the problem goes away, the first modem is possibly defective. Call Tech Support for
assistance (see
48
D).
Appendix D).