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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 2 Alarm Troubleshooting
2.7.159 LPKTERMINAL (CE100T)
Caution CTC permits loopbacks to be performed on an in-service (IS) circuit. Loopbacks are
Service-Affecting (SA).
Note Before performing a facility (line) loopback on an OC-3 or OC-12 port, ensure the card contains at least
two DCC paths to the node where the card is installed. A second DCC path provides a nonlooped path
to log into the node after the loopback is applied, thus enabling you to remove the facility loopback.
Ensuring a second DCC is not necessary if you are directly connected to the ONS 15310-CL or
ONS 15310-MA containing the loopback OC-3 or OC-12.
Clear the LPBKFACILITY (OCN) Condition
Step 1 Complete the “Clear an OC-N Port Facility or Terminal Loopback Circuit” procedure on page 2-156.
Step 2 If the condition does not clear, log into the Technical Support Website at
http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447).
2.7.159 LPKTERMINAL (CE100T)
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Object: CE100T
A Loopback Terminal condition on a CE-100T-8 port occurs when a software terminal loopback is active
for a port on the card.
For information about troubleshooting optical circuits with loopbacks, refer to the “1.1 Network
Troubleshooting Tests” section on page 1-2.
Clear the LPBKTERMINAL (CE100T) Condition
Step 1 Complete the “Clear an Ethernet Card Loopback Circuit” procedure on page 2-157.
Step 2 If the condition does not clear, log into the Technical Support Website at
http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447).
2.7.160 LPBKTERMINAL (DS1, DS3)
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Objects: DS1, DS3
A Loopback Terminal condition for a DS-1 or DS-3 signal occurs when a software terminal (inward)
loopback is active for a DS1 or DS3 port on a 15310-CL-CTX, DS1-28/DS3-EC1-3, or
DS1-84/DS3-EC1-3 card. DS-1 and DS-3 terminal loopbacks do not typically return an AIS signal.