Clear The Kbyte-Aps-Channel-Failure Alarm; Laser-Bias; Clear The Laser-Bias Alarm - Cisco ONS 15600 SDH Troubleshooting Manual

Chapter 2 Alarm Troubleshooting
The APS Channel Failure alarm is raised when a span is provisioned for different APS channels on each
side. For example, the alarm is raised if K3 is selected on one end and F1, E2, or Z2 is selected on the
other end.
This alarm is also raised during checksum failure if the K1 and K2 bytes are overwritten by test
equipment. It is not raised in bidirectional full pass-through or K-byte pass-through states. The alarm is
overridden by AIS-P, LOF, LOS, or SF-BER alarms.

Clear the KBYTE-APS-CHANNEL-FAILURE Alarm

The alarm is most frequently raised due to mismatched span provisioning. In this case, reprovision one
Step 1
side of the span with the same parameters. To do this, refer to the "Manage Circuits" chapter in the
Cisco ONS 15600 SDH Procedure Guide for procedures.
Step 2 If the error is not caused by incorrect provisioning, it is because of checksum errors within an STM-N,
cross-connect, or TSC card. In this case, complete the
Switch" procedure on page 2-132
If third-party equipment is involved, ensure that it is configured for the same APS channel as the
Step 3
Cisco ONS equipment.
If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
Step 4
for more information or call Cisco TAC (1 800 553-2447).

2.6.111 LASER-BIAS

The High Laser Bias Current alarm occurs when a port on an STM-64 card is transmitting a laser current
outside of the acceptable preset range. The alarm occurs at the card level rather than at the port level.
The alarm is typically accompanied by signal or bit errors on the downstream node.
The difference between this alarm and the laser bias current performance-monitoring parameter is that
Note
the alarm indicates a serious physical condition in the transmitter.

Clear the LASER-BIAS Alarm

Step 1 If the alarm is reported against the working STM-64 facility and traffic has not automatically switched
to protect, initiate a Force switch. If it is part of an SNCP, complete the
Circuits on a SNCP Span" procedure on page
"Initiate a 1+1 Protection Port Force Switch Command" procedure on page
Complete the
Step 2
If the alarm does not clear after replacing the card, log into the Technical Support Website at
Step 3
http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447) to report a
Service-Affecting (SA) problem.
July 2010
Logical Object: STMN
Default Severity: Critical (CR), Service- Affecting (SA)
Logical Objects: EQPT, PPM
"Replace an I/O Card" procedure on page 2-134
"Request a Cross-Connect Card Preferred Copy
to allow CTC to resolve the issue.
2-126. If is part of a 1+1 protection group, complete the
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
2.6.111 LASER-BIAS
"Initiate a Force Switch for All
2-123.
for the reporting card.
2-79