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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
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Chapter 1 Alarm Troubleshooting
1.7.1 AIS
1.7.1 AIS
Default Severity: Not Reported (NR), Non-Service-Affecting (NSA)
Logical Objects: BITS, DS1, DS3, FUDC
The Alarm Indication Signal (AIS) condition indicates that this node is detecting an alarm indication
signal in the incoming signal SONET overhead.
Generally, an AIS is a special SONET 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 the node sees 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 resolve the problem on the upstream node.
Clear the AIS Condition
Step 1
Determine whether there are alarms on the upstream nodes and equipment, especially the
“LOS (OCN)”
alarm on page 1-99
, or if there are out-of-service (OOS,MT or OOS,DSBLD) ports.
Step 2
Clear the upstream alarms using the applicable procedures in this chapter.
Step 3
If the condition 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).
1.7.2 AIS-L
Default Severity: Not Reported (NR), Non-Service-Affecting (NSA)
Logical Objects: EC1, OCN
The AIS Line condition indicates that this node is detecting line-level AIS in the incoming signal. This
alarm is secondary to another alarm occurring simultaneously in an upstream node.
This condition can also be raised in conjunction with the
“TIM-S” alarm on page 1-140
if AIS-L is
enabled.
Clear the AIS-L Condition
Step 1
Complete the
“Clear the AIS Condition” procedure on page 1-19
.
Step 2
If the condition 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).
1.7.3 AIS-P
Default Severity: Not Reported (NR), Non-Service-Affecting (NSA)
Logical Objects: STSMON, STSTRM
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