Lo-Rxpower; Los (Bits); Clear The Los (Bits) Alarm - Cisco ONS 15600 SDH Troubleshooting Manual

Chapter 2 Alarm Troubleshooting
Always use the supplied electrostatic discharge wristband when working with a powered
Caution
ONS 15600 SDH. Plug the wristband cable into the ESD jack located on the lower-right edge of the shelf
assembly.
If the incoming signal is valid, complete the
Step 3
reporting card.
Note
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) 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)

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

Check the wiring connection from the ONS 15600 SDH backplane BITS clock pin fields to the timing
Step 1
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.
Always use the supplied electrostatic discharge wristband when working with a powered
Caution
ONS 15600 SDH. Plug the wristband cable into the ESD jack located on the lower-right edge of the shelf
assembly.
Ensure that the BITS clock is operating properly.
Step 2
If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
Step 3
for more information or call Cisco TAC (1 800 553-2447) to report a Service-Affecting (SA) problem.
July 2010
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.
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: BITS
"Replace an I/O Card" procedure on page 2-134
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
2.6.122 LO-RXPOWER
for the
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