Motorola V.34-SDC, and V.32bis, 326X V.34 manual Data Mode

326X Series Modem Troubleshooting Guide (Continued)

Problem	Diagnosis/Test	Possible Solution
Cannot hear connec-	Check Speaker (ATM) option.	If the speaker is not on, turn it on.
tion through the speaker
(stand-alone units)
	Check Volume (ATL) option.	Adjust volume.
DATA MODE

The modem connects, Check that the modem is in data

but cannot pass data mode (“Data 9600”, for exam- ple, displays).

Check that the TD LED is lit on modem's front panel (steady or flashing) indicating that the modem is receiving data from the DTE.

If the modem is not in data mode, establish a connection with the remote modem.

•Check DTE for EIA signal requirements.

•Ensure the modem is correctly cabled to the DTE (with a straight-through cable for your electrical interface—V.35 or RS-232).

•Check that the correct communications port is being used.

Check the DTE rate of the local modem.

Check the DTE's flow control method.

If in normal mode, check for modem-to-modem flow control.

Verify line quality:

Ensure that the DTE rate matches the modem’s terminal rate setting.

•Ensure that the DTE's flow control is the same as the modem’s setting

(for example, XON-XOFF, RTS/CTS).

•If your communications software package’s file transfer protocol is used, and the package supports RTS/CTS Flow control, set Flow=RTS/CTS

(AT*FL3). If the package does not support RTS/ CTS flow control, set Flow=Off (AT*FL0).

Turn modem flow control off.

Troubleshooting

	• Run a remote digital	After running the RDL, if no errors occur, your line is
	loopback (RDL) or RDL	good.
	with pattern test.	If errors occur, perform a manual retrain, or retry the
		phone call.
	• If you are still receiving	If the LAL or LAL with pattern test fails, contact Motor-
	errors, disconnect the	ola Customer Support.
	modem from the line and	If the LAL or LAL with pattern test passes, you may have
	perform a local analog
		a line problem (contact your telephone company) or a
	loopback (LAL) or LAL
		problem with your application (check with your software
	with pattern test (with
		vendor).
	modem flow control off).
Premature disconnect	Ensure that the remote modem	If the remote modem does not support error correction,
	supports error correction.	set the modem to normal mode and retry the call.
	Check the disconnect reason	Based upon the disconnect reason, take the appropriate
	from the modem's front panel.	action.

Troubleshooting Guide 6-5