Paradyne 3821PLUS manual Table C-6, Fax Operation

COMSPHERE 3821Plus Modem

	Table C-5
	(2 of 2)
	Modem ± VF Connection
Symptom	Action
Intermittent disconnects,	Use the AT&T7 command to perform a remote digital loopback test with pattern test.
high error rates, or
excessive retransmissions
Modem connects but sends	Your modem may be configured to use security and you are not supplying the proper
ERROR result code to DTE	passwords. See Chapter 7, Security.
Modem establishes and	You may have a poor VF connection. Disconnect and dial again.
disconnects a call	The remote modem may have encountered an EC Disconnect, where the modem is
	configured to establish a call using error correction.
	If the modems cannot negotiate EC, then a disconnect occurs.
	The remote modem may be in a forced Error Control mode (causing it to disconnect if there
	is no error control). Reconfigure your modem to V.42/MNP or Buffer and try again.
	Perform a Local Analog Loopback test to check the modem's hardware operation.
High error rates occur when	Incoming rings can cause data errors during a loopback test. If possible, disconnect the VF
running a local loopback or	line, then abort and restart the test.
self-test.

	Table C-6
	Fax Operation
Symptom	Action
Modem cannot send or	Make sure that your fax software is correctly installed.
receive a fax	Check your fax software to see if there is an Answer mode or Receive Fax setting that must
	be enabled.
Sections of your fax are	This often indicates a noisy telephone line or a flow control problem. To resolve the flow
missing	control problem, try using hardware flow control (RTS/CTS). This must be enabled in your
	software (refer to the software's documentation) and set within your modem using the
	AT&K3 command (RTS/CTS flow control).
Your fax did not complete,	For some reason your modem and software are no longer communicating, and, as a result,
and your modem displays	your modem is stuck in fax mode. Type ATE1V1 and press Enter. The software should
result codes in the numeric	respond with an OK. Try sending or receiving the fax again.
format

C-4 January 1999 3821-A2-GB20-40