Motorola 3460 manual Call Termination

3460 Fast’R

Table 5-1. Troubleshooting the 3460 Fast’R Modem

Problem	Diagnosis/Test	Possible Solution
	If Mode=Normal	If no RDL errors occur, the line
	(AT*SM1), check line	is OK.
	quality:	If errors occur, perform a
	• Check CQMS	manual retrain, or retry the
	parameters with	phone call.
	Fast’RVu
	• Run a remote digital
	loopback (RDL) or
	RDL with pattern test	If the modem fails, contact
	• Disconnect the
		Motorola customer service.
	modem from the line.
		If the modem passes, there may
	Run a local analog
		be a line problem (contact
	loopback (LAL)
		telephone company) or a
	(AT&T1), or LAL
		software problem (check with
	pattern test (AT&T8),
		software vendor).
	with modem flow
	control off.
Modem stops	Modem could be in	Set the modem for hardware
passing data	“flow off” condition	flow control (AT*FL3).
	(modem set for XON-
	XOFF and computer
	set for hardware flow
	control).
The modem	Check CQMS	Line quality is not sufficient to
connects at a	parameters with	support higher data rate. If line
lower rate than	Fast’RVu.	quality improves, the modem
Max Rate	Ensure that the remote	increases its speed
(AT*MX)	modem supports the	automatically.
option.	modem rates you
	anticipate.
Modem retrains	Retry call.	A line problem is indicated.
occur frequently		Reduce the transmit rate
		(AT*MX); if excessive retrains
		continue, contact telephone
		company.
CALL TERMINATION
Modem takes	Check whether remote	If remote modem doesn't
too long to	modem supports PSTN	support PSTN cleardown, set
disconnect	cleardown.	local modem to Longspace
		Disconnect (ATY1).

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