Foundry Networks AR1202 manual Derivative of the configure module t1 enable

Foundry AR-Series AR1202 and AR1204 Installation Guide

Table B.2: Common Symptoms and Actions (Continued)

Symptom	Cause	Action
WAN Status LED is	The link is not in	Enable the link using the appropriate
not illuminated.	service	derivative of the configure module t1 enable
		command.
WAN Status LED is	The link is faulty.	If a LOS (loss of signal) alarm is present:
red.	(The system has	1 Check the WAN cable connections to the
	detected an
		system. If you are using non-Foundry
	abnormal
		cable(s), see Table on page A-5for more
	incoming signal.)
		information.
		2 If the cable is good, perform a BERT test
		on the link.
		3 If the BERT test passes, check the WAN
		link between the two ends with external test
		equipment. If the link is good, the Foundry
		router is faulty.
WAN Status LED is	The link is faulty	Perform the BERT test (and other steps above
yellow.	(far-end system	from the far end) in conjunction with a T1 line
	has detected an	loopback at the Foundry router.
	abnormal
	incoming T1
	signal).
WAN Status LED	The link is not	1 If frame errors are present, look for a
blinks green or	properly	configuration mismatch between the
yellow.	configured at one	Foundry system and the far-end system.
	or both ends or it	2 If CRC-6 errors or BPVs are present, check
	is operating
		the Line Build Out (LBO) configuration
	marginally.
		settings at both ends.
System cannot lock	The BERT test	Try using another BERT pattern. If the problem
onto a BERT pattern	has failed.	continues, call your WAN service provider.
from the far end.
BERT error rate	The link is faulty or	1 If an all-ones or all-zeros test is in progress,
exceeds 1% of	deteriorating.	check the Line Build Out (LBO)
transmitted bits.		configuration.
		2 If a QRW test is in progress, check for the
		same link configuration at the far end.

B - 4 © 2004 Foundry Networks, Inc. June 2004