2-85
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 2 Alarm Troubleshooting
2.6.122 LO-RXPOWER
Caution
Always use the supplied electrostatic discharge wristband when working with a powered
ONS 15600 SDH. Plug the wristband cable into the ESD jack located on the lower-right edge of the shelf
assembly.
Step 3
If the incoming signal is valid, complete the
“Replace an I/O Card” procedure on page 2-134
for the
reporting card.
Note
If the traffic (STM-N) card is implicated and you are able to continue using the traffic card with
one port out of service, perform a bridge and roll to move the port traffic to a free port. Refer to
the “Manage Circuits” chapter in the
Cisco ONS 15600 SDH Procedure Guide
for instructions.
Label the bad port, and place it out of service until the card can be replaced.
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) to report a Service-Affecting (SA) problem.
2.6.122 LO-RXPOWER
For information about this condition, refer to the “Alarm Troubleshooting” chapter of the
Cisco ONS 15454 DWDM Troubleshooting Guide
.
2.6.123 LOS (BITS)
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: BITS
The Loss of Signal BITS alarm is Major (MJ) if there is no backup TSC card BITS source, and
Minor (MN) if one of the TSC card BITS sources fails. If one of the pair fails, a timing APS is activated
on the second source.
Clear the LOS (BITS) Alarm
Step 1
Check the wiring connection from the ONS 15600 SDH backplane BITS clock pin fields to the timing
source. For more information about backplane wiring connections, refer to the “Install the Bay and
Backplane Connections” chapter in the
Cisco ONS 15600 SDH Procedure Guide
.
Caution
Always use the supplied electrostatic discharge wristband when working with a powered
ONS 15600 SDH. Plug the wristband cable into the ESD jack located on the lower-right edge of the shelf
assembly.
Step 2
Ensure that the BITS clock is operating properly.
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) to report a Service-Affecting (SA) problem.
Summary of Contents for Cisco ONS 15600 SDH
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