Foundry Networks AR1202 - Manual (Page 54)

Foundry AR-Series AR1202 and AR1204 Installation Guide
B - 4 © 2004 Foundry Networks, Inc. June 2004
WAN Status LED is
not illuminated. The link is not in
service Enable the link using the appropriate
derivative of the configure module t1 enable
command.
WAN Status LED is
red. The link is faulty.
(The system has
detected an
abnormal
incoming signal.) If a LOS (loss of signal) alarm is present:
1 Check the WAN cable connections to the
system. If you are using non-Foundry
cable(s), see Table on page A-5 for more
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
yellow. The link is faulty
(far-end system
has detected an
abnormal
incoming T1
signal). Perform the BERT test (and other steps above
from the far end) in conjunction with a T1 line
loopback at the Foundry router.
WAN Status LED
blinks green or
yellow. The link is not
properly
configured at one
or both ends or it
is operating
marginally. 1 If frame errors are present, look for a
configuration mismatch between the
Foundry system and the far-end system.
2 If CRC-6 errors or BPVs are present, check
the Line Build Out (LBO) configuration
settings at both ends.
System cannot lock
onto a BERT pattern
from the far end. The BERT test
has failed. Try using another BERT pattern. If the problem
continues, call your WAN service provider.
BERT error rate
exceeds 1% of
transmitted bits. The link is faulty or
deteriorating. 1 If an all-ones or all-zeros test is in progress,
check the Line Build Out (LBO)
configuration.
2 If a QRW test is in progress, check for the
same link configuration at the far end.
Table B.2: Common Symptoms and Actions (Continued)
Symptom Cause Action