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Chapter 2 Alarm Troubleshooting
Alarm Procedures
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).
2.7.164 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.
For information about troubleshooting optical circuits with loopbacks, refer to the “1.2 Identify Points
of Failure on an Electrical Circuit Path” section on page 1-3. Facility loopbacks are described in the
“1.1 Network Troubleshooting Tests” section on page 1-2.
Clear the LPBKTERMINAL (DS1, DS3) Condition
Step 1 Complete the “Clear a DS-3 or DS-1 Port Loopback Circuit” procedure on page 2-165.
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).
2.7.165 LPBKTERMINAL (EC1)
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Object: EC1
A Loopback Terminal condition for an EC-1 port occurs when a software terminal (inward) loopback is
active for an EC1 port on a 15310-CL-CTX, DS1-28/DS3-EC1-3, or DS1-84/DS3-EC1-3 card.
For information about troubleshooting optical circuits with loopbacks, refer to the “1.1 Network
Troubleshooting Tests” section on page 1-2.
Caution CTC permits loopbacks to be performed on in-service (IS) circuits. Loopbacks are
Service-Affecting (SA).
Clear the LPBKTERMINAL (EC1) Condition
Step 1 Complete the “Clear an EC-1 Port Loopback” procedure on page 2-166.
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).
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