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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter2 Alarm Troubleshooting
2.7 Alarm Procedures
2.7 Alarm Procedures
This section list alarms alphabetically and includes some conditions commonly encountered when
troubleshooting alarms. The severity, description, and troubleshooting procedure accompany each alarm
and condition.
Note When you check the status of alarms for cards and ports, ensure that the alarm filter tool in the lower
right corner of the GUI is not indented. When you are done checking for alarms, click the alarm filter
tool again to turn filtering back on. For more information about alarm filtering, refer to the “Manage
Alarms” chapter in the Cisco ONS 15310-CL and CiscoONS 15310-MA Procedure Guide.
Note When checking alarms, ensure that alarm suppression is not enabled on the card or port. For more
information about alarm suppression, refer to the “Manage Alarms” chapter in the Cisco ONS 15310-CL
and Cisco ONS 15310-MA Procedure Guide.

2.7.1 AIS

Default Severity: NotReported (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

Step1 Determine whether there are alarms on the upstream nodes and equipment, especially the “LOS (OCN)”
alarm on page 2-98, or if there are out-of-service (OOS,MT or OOS,DSBLD) ports.
Step2 Clear the upstream alarms using the applicable procedures in this chapter.
Step3 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).

2.7.2 AIS-L

Default Severity: NotReported (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.