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2.6.149 MS-DEG
Generally, any AIS is a special SDH signal that communicates to the receiving node when the transmit
node does not send a valid signal. AIS is not considered an error. It is raised by the receiving node on
each input when it detects the AIS instead of a real signal. In most cases when this condition is raised,
an upstream node is raising an alarm to indicate a signal failure; all nodes downstream from it only raise
some type of AIS. This condition clears when you resolved the problem on the upstream node.
Clear the MS-AIS Condition
Complete the
Step 1
If the condition does not clear, log into the Cisco Technical Support Website at
Step 2
http://www.cisco.com/techsupport for more information or log into
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free
Technical Support numbers for your country.
2.6.149 MS-DEG
The Multiplex Section Signal Degrade condition occurs when the multiplex section overhead of the
STMN object falls within the degrade threshold set on the node.
Clear the MS-DEG Condition
Determine the threshold. If adjustment is acceptable in site practices, adjust the threshold.
Step 1
Using an optical test set, measure the input power level of the line and ensure that the level is within the
guidelines. For specific procedures to use the test set equipment, consult the manufacturer.
Verify the input fiber cable connections to the reporting card.
Step 2
Clean the input fiber cable ends according to site practice.
Step 3
If the condition does not clear, log into the Cisco Technical Support Website at
Step 4
http://www.cisco.com/techsupport for more information or log into
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free
Technical Support numbers for your country.
2.6.150 MS-EOC
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
2-98
"Clear the AIS Condition" procedure on page
Default Severity:Not Alarmed (NA), Non-Service-Affecting (NSA)
Logical Object: STMN
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: STMN
Chapter 2 Alarm Troubleshooting
2-15.
July 2010
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Table of Contents
Troubleshooting
