2-122
Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 2 Alarm Troubleshooting
2.7.160 HI-LASERBIAS
Clear the HI-CCVOLT Condition
Step 1 Lower the source voltage to the clock.
Step 2 If the condition does not clear, add more cable length or add a 5 dBm attenuator to the cable.
Step 3 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 in order to report a Service-Affecting (SA)
problem.
2.7.160 HI-LASERBIAS
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
SONET Logical Objects: EQPT, OCN
DWDM Logical Objects: 2R, ESCON, FC, GE, ISC, PPM, TRUNK
The Equipment High Transmit Laser Bias Current alarm is raised against TXP_MR_10G,
TXP_MR_2.5G, TXPP_MR_2.5G, TXP_MR_10E, MXP_2.5G_10G, MRC-12, MRC-4, and
OC192-XFP card laser performance. The alarm indicates that the card laser has reached the maximum
laser bias tolerance.
Laser bias typically starts at about 30 percent of the manufacturer maximum laser bias specification and
increases as the laser ages. If the HI-LASERBIAS alarm threshold is set at 100 percent of the maximum,
the laser usability has ended. If the threshold is set at 90 percent of the maximum, the card is still usable
for several weeks or months before it needs to be replaced.
Note For more information about provisioning MXP or TXP PPMs, refer to the “Provision Transponders and
Muxponders” chapter of the Cisco ONS 15454 DWDM Procedure Guide. For more information about
the cards themselves, refer to the Cisco ONS 15454 DWDM Reference Manual.
Clear the HI-LASERBIAS Alarm
Step 1 Complete the “Clear the LASEREOL Alarm” procedure on page 2-137, which can include replacing the
card. Replacement is not urgent and can be scheduled during a maintenance window.
Caution Removing an active card can cause a traffic hit. To avoid this, perform an external switch if a switch has
not already occurred. See the “2.9.2 Protection Switching, Lock Initiation, and Clearing” section on
page 2-262 for commonly used traffic-switching procedures.
Step 2 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.
To Next Page
Loading...
