Digicom 3910, 3911 operation manual Table B-4, Modem DTE Connection

Troubleshooting

	Table B-4
	Modem — DTE Connection
Symptom	Action
The modem does not accept or	Verify that the cable between the Async port of the DTE and the
echo back AT commands.	modem is a standard RS-232 cable. (Null modem cables, also known
	as crossover cables, do not work in this application.)
	Verify that the Command Character Echo configuration option is
	enabled. Refer to DTE Dialer in Chapter 5, DCP Configuration.
	Verify that the DTE Dialer Type configuration option is set to AT. Refer
	to DTE Dialer in Chapter 5, DCP Configuration.
	Verify that the Result Codes configuration option is enabled. Refer to
	DTE Dialer in Chapter 5, DCP Configuration.
	Reload the Async Dial factory configuration area to guarantee that all
	configuration options are returned to their proper setting.
	Make sure that all AT commands are terminated with a carriage return.
	Verify that the Carriage Return Character configuration option matches
	what is used by the DTE. Refer to DTE Dialer in Chapter 5, DCP
	Configuration.
	Verify that the DTE has a valid character format. Valid format consists
	of 8 data bits with no parity or 7 data bits with even, odd, mark or
	space parity.
	Verify that the DTE’s data rate is supported by the modem. Refer to the
	Async DTE Rate configuration option in DTE Interface in Chapter 5,
	DCP Configuration.
	If using a PC, verify that the modem is attached to the correct
	communications port.

3910-A2-GN32-40 September 1998 B-3