2-79
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 2 Alarm Troubleshooting
2.6.111 LASER-BIAS
Logical Object: STMN
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
Step 1
The alarm is most frequently raised due to mismatched span provisioning. In this case, reprovision one
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
“Request a Cross-Connect Card Preferred Copy
Switch” procedure on page 2-132
to allow CTC to resolve the issue.
Step 3
If third-party equipment is involved, ensure that it is configured for the same APS channel as the
Cisco ONS equipment.
Step 4
If the alarm 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).
2.6.111 LASER-BIAS
Default Severity: Critical (CR), Service- Affecting (SA)
Logical Objects: EQPT, PPM
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.
Note
The difference between this alarm and the laser bias current performance-monitoring parameter is that
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
“Initiate a Force Switch for All
Circuits on a SNCP Span” procedure on page 2-126
. If is part of a 1+1 protection group, complete the
“Initiate a 1+1 Protection Port Force Switch Command” procedure on page 2-123
.
Step 2
Complete the
“Replace an I/O Card” procedure on page 2-134
for the reporting card.
Step 3
If the alarm does not clear after replacing the card, log into the Technical Support Website at
http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447) to report a
Service-Affecting (SA) problem.
Содержание Cisco ONS 15600 SDH
Страница 18: ...Contents xviii Cisco ONS 15600 SDH Troubleshooting Guide R8 0 July 2010 ...
Страница 20: ...Figures xx Cisco ONS 15600 SDH Troubleshooting Guide R8 0 July 2010 ...
Страница 30: ...xxx Cisco ONS 15600 SDH Troubleshooting Guide R8 0 July 2010 About this Guide ...
Страница 256: ...3 8 Cisco ONS 15600 SDH Troubleshooting Guide R8 0 July 2010 Chapter 3 Transient Conditions 3 3 28 WKSWPR ...
Страница 306: ...4 50 Cisco ONS 15600 SDH Troubleshooting Guide R8 0 July 2010 Chapter 4 Error Messages ...
Страница 318: ...Index IN 12 Cisco ONS 15600 SDH Troubleshooting Guide R8 0 July 2010 ...