Error Conditions - AT&T MERLIN LEGEND Reference

Maintenance
Table 6-1. Error Conditions
Type of Error
BRI LOSS OF SYNC
BRI SLIPS >88
BRI NET REQUESTED CCRCs
BRI NET DEACTIVATE
BRI NET INV 2B+D LB ACT
BRI NET INV B1 LB ACT
BRI NET INV B2 LB ACT
BRI NET INV IL LB ACT
BRI NET INV QM LB ACT
ENDPT IN RESTRICTED SVCE
LINK ESTABLISHMENT FAIL
ENDPOINT UNINIT (L2, L3)
NW TOOK ENDPOINT 00S
NW NOT RESPOND TO SETUP
NW NOT RESPOND TO RELEAS
NEBEs
FEBEs
Synchronization Errors
Some errors occur because of loss of synchronization in framing.
Loss of Synchronization (BRI LOSS OF SYNC)
A loss of synchronization occurs when the synchronization word for establishing
basic framing and/or the inverted synchronization word for establishing the
superframe has not been detected for 480 milliseconds (ins). A loss of
synchronization is a permanent error and causes the system reaction for
permanent errors, as described above. The facilities affected by the loss of
synchronization are taken out of service until the error condition is removed.
Abbrv. Permanent?
SYNC Yes
No
CCRC No
DEAC Yes
2B+D Yes
B1LB Yes
B2LB Yes
ILLB Yes
QMLB Yes
T e x t Yes
Yes
Yes
No
Yes
Yes
No
-
No
Error Logs and Error Messages
Transient? Sys. Alarm?
No
Yes
Yes No
Yes No
No Yes
No Yes
No Yes
No
Yes
No Yes
No Yes
No
Yes
No Yes
No Yes
Yes No
No
Yes
No Yes
No No
No No
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