Cisco ONS 15310-MA Troubleshooting Manual page 102

Alarm Procedures
A Loopback Facility condition on a CE-Series port occurs when a software facility (line) loopback is
active for a port on the card.
For information about troubleshooting optical circuits with loopbacks, refer to the
Troubleshooting Tests" section on page
Clear the LPBKFACILITY (CE100T, CEMR) Condition
Complete the
Step 1
If the condition does not clear, log into the Technical Support Website at
Step 2
http://www.cisco.com/cisco/web/support/index.html for more information or call Cisco TAC
(1-800-553-2447).
2.7.144 LPBKFACILITY (E1, DS3)
A Loopback Facility condition for a E1 or DS-3 signal occurs when a software facility (line) loopback
is active for a E1 or DS-3 port on a 15310-MA SDH CTX, E1-21/DS3-E3-3, or E1-63/DS3-E3-3 card.
For information about troubleshooting optical circuits with loopbacks, refer to the
of Failure on an Electrical Circuit Path" section on page
"1.1 Network Troubleshooting Tests" section on page
CTC permits loopbacks to be performed on an unlocked circuit. Performing a loopback is
Note
Service-Affecting (SA). If you did not perform a lock out or Force switch to protect traffic, the
LPBKFACILITY condition can be accompanied by a more serious alarms such as LOS.
Note DS-3 facility (line) loopbacks do not transmit an AIS in the direction away from the loopback. Instead
of AIS, a continuance of the signal transmitted to the loopback is provided.
Clear the LPBKFACILITY (E1, DS3) Condition
Complete the
Step 1
If the condition does not clear, log into the Technical Support Website at
Step 2
http://www.cisco.com/cisco/web/support/index.html for more information or call Cisco TAC
(1-800-553-2447).
2.7.145 LPBKFACILITY (E3)
Cisco ONS 15310-MA SDH Troubleshooting Guide, Release 9.0
2-102
"Clear an Ethernet Card Loopback Circuit" procedure on page
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SDH Logical Objects: E1, DS3
"Clear a DS-3 or E1 Port Loopback Circuit" procedure on page
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
1-2.
1-4. Facility loopbacks are described in the
1-2.
Chapter 2 Alarm Troubleshooting
"1.1 Network
2-156.
"1.2 Identify Points
2-155.
78-18663-01