Cisco ONS 15310-MA Troubleshooting Manual page 20

Alarm Procedures
Generally, an 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 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
Determine whether there are alarms on the upstream nodes and equipment, especially the
Step 1
alarm on page
Clear the upstream alarms using the applicable procedures in this chapter.
Step 2
If the condition does not clear, log into the Technical Support Website at
Step 3
http://www.cisco.com/cisco/web/support/index.html for more information or call Cisco TAC
(1-800-553-2447).
2.7.2 MS-AIS
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
enabled.
Clear the MS-AIS Condition
Complete the
Step 1
If the condition does not clear, log into the Technical Support Website at
Step 2
http://www.cisco.com/cisco/web/support/index.html for more information or call Cisco TAC
(1-800-553-2447).
2.7.3 AU-AIS
The AIS Path condition means that this node is detecting AIS in the incoming path. This alarm is
secondary to another alarm occurring simultaneously in an upstream node.
Cisco ONS 15310-MA SDH Troubleshooting Guide, Release 9.0
2-20
2-98, or if there are out-of-service (locked, maintenance or locked, disabled) ports.
Default Severity: Not Reported (NR), Non-Service-Affecting (NSA)
Logical Objects: E3, STM
"Clear the AIS Condition" procedure on page
Default Severity: Not Reported (NR), Non-Service-Affecting (NSA)
Logical Objects: VCMON-HP, VCTRM-HP
Chapter 2
"RS-TIM" alarm on page 2-138
2-20.
Alarm Troubleshooting
"LOS (STM)"
if MS-AIS is
78-18663-01