The Modem Dials But Cannot Make A Connection - Multitech MULTIMODEM MT5600ZDX Owner's Manual

If you need to open your computer to change switches or jumpers on
the conflicting device; refer to the device's documentation.
• The serial port may be defective. If you have another serial port,
install the modem on it, change the COM port setting in your
software, and try again.
• The modem may 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 Chapter 5).

The Modem Dials But Cannot Make a Connection

There can be several reasons the MultiModemZDX fails to make a
connection. Possibilities include
• modem is not configured properly.
• lack of a physical connection to the telephone line.
• a wrong dial tone.
• a busy signal.
• a wrong number.
• no modem at the other end.
• a faulty modem, computer, or software at the other end.
• incompatibility between modems.
You can narrow the list of possibilities by using extended result codes.
To enable them, enter ATV1X4 and press ENTER while in terminal
mode, or include V1X4 in the modem's initialization string. When you
dial again, the modem will report the call's progress.
• Both local and remote modems may be misconfigured, thus
encumbering the negotiation process between modems. The
solution may be to modify modem parameters via AT command
strings. There are other configurations you can modify as well.
Note that you can return to the modem's default configuration by
entering AT&F. If your application requires modification, use the
following command strings corresponding to your application:
Chapter 2 - Installation
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