The Modem Does Not Respond To Commands - Multitech MULTIMODEM MT5600ZDX Owner's Manual

The Modem Does Not Respond to Commands

• Make sure the modem is plugged in and turned on. (See "None of
the LEDs Light When the Modem Is On.")
• Make sure you are issuing the modem commands from the data
communications software, either manually in terminal mode or
automatically once you have configured 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
your phonebook entry or session settings. Be sure your modem is
not in data mode when you type a command. Use the escape
character sequence to switch to terminal mode. The default
escape sequence must wait at least one second, enter +++, and
pause another second or more before entering a command.
• The E0 and Q1 commands may be in effect, disabling echo and
responses. Verify this with the &V command. To enable echo
and responses, enter ATE1Q0<cr>.
• Try resetting your modem by turning it off and on. Make sure there
is a reset command (&F) in your initialization string, or your
modem may not initialize correctly.
• If you don't get an OK , the problem may still be in the
communications software. Make sure you have done whatever is
necessary in your software to make a port connection. Not all
communications programs connect to the COM port automatically.
Some connect when the software loads and remain connected
until the program terminates. Others can disconnect without
exiting the program. Many communications software packages
also allow multiple terminals to be open, but only one can access
the modem at a time. If your package reports that it cannot make
a connection, yet the modem's TR indicator is on, click on the
Window menu to see if more than one terminal is open. The
modem's TR indicator shows that the software has made a
connection with the modem through the COM port.
• Your communications software settings may not match the
physical port the modem is connected to. The serial cable may be
plugged into the wrong connector—check your computer
documentation to make sure. Or you may have selected a COM
port in your software other than the one the modem is physically
connected to—compare the settings in your software to the
physical connection.
Chapter 2 - Installation
23