Clear The Apsb Alarm; Apscdfltk; Apsc-Imp; Apscincon - Cisco ONS 15310-CL Troubleshooting Manual

Chapter 1 Alarm Troubleshooting
The APS Channel Byte Failure alarm occurs when LTE detects protection switching byte failure or an
invalid switching code in the incoming APS signal. Some older SONET nodes not manufactured by
Cisco send invalid APS codes if they are configured in a 1+1 protection group with newer SONET nodes,
such as the ONS 15310-CL and ONS 15310-MA. These invalid codes cause an APSB alarm on the
ONS 15310-CL and ONS 15310-MA.

Clear the APSB Alarm

Use an optical test set to examine the incoming SONET overhead to confirm inconsistent or invalid
Step 1
K bytes. For specific procedures to use the test set equipment, consult the manufacturer. If corrupted
K bytes are confirmed and the upstream equipment is functioning properly, the upstream equipment
might not interoperate effectively with the ONS 15310-CL and ONS 15310-MA.
If the condition does not clear, log into the Technical Support Website at
Step 2
http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447).

1.7.8 APSCDFLTK

The APSCDFLTK alarm is not used in the ONS 15310 platforms in this release. It is reserved for
development.

1.7.9 APSC-IMP

The APSC-IMP alarm is not used in the ONS 15310 platforms in this release. It is reserved for
development.

1.7.10 APSCINCON

An APS Inconsistent alarm means that an inconsistent APS byte is present. The SONET overhead
contains K1/K2 APS bytes that notify receiving equipment, such as the ONS 15310-CL and
ONS 15310-MA, to switch the SONET signal from a working to a protect path when necessary. An
inconsistent APS code occurs when three consecutive frames contain nonidentical APS bytes, which in
turn give the receiving equipment conflicting commands about switching.

Clear the APSCINCON Alarm

Look for other alarms, especially the
Step 1
page 1-89
If an APSINCON alarm occurs with no other alarms, log into the Technical Support Website at
Step 2
http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447).
78-17235-01
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
SONET Logical Object: OCN
(or the "AIS" condition on page
"LOS (OCN)" alarm on page
1-19). Clearing these alarms clears the APSCINCON alarm.

Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0

1.7.8 APSCDFLTK
1-99,or the "LOF (OCN)" alarm on
1-21