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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter2 Alarm Troubleshooting
2.7.73 FE-AIS
If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
for more information or call CiscoTAC (1-800-553-2447).
2.7.73 FE-AIS
Default Severity: NotAlarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Object: DS3
The Far-End AIS condition occurs when an AIS has occurred at the far-end node. FE-AIS usually occurs
in conjunction with a downstream LOS alarm (see the “LOS (OCN)” alarm on page 2-98).
Generally, an AIS is a special SONET signal that tells the receiving node that the sending node has no
valid signal available to send. AIS is not considered an error. The AIS condition 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 resolve the problem on the upstream node.

Clear the FE-AIS Condition

Step1 Complete the “Clear the AIS Condition” procedure on page2-18.
Step2 If the condition does not clear, log into the Technical Support Website at
http://www.cisco.com/techsupport for more information or call CiscoTAC (1-800-553-2447).
2.7.74 FE-DS1-MULTLOS
Default Severity: NotAlarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Object: DS3
The Far-End Multiple DS-1 LOS Detected condition occurs when multiple DS-1 signals are lost on a
far-end 15310-CL-CTX, ONS15310-MA DS1-28/DS3-EC1-3, or ONS 15310-MA DS1-84/DS3-EC1-3
DS-1 port.
The prefix FE means the main alarm is occurring at the far-end node and not at the node reporting the
FE-DS1-MULTLOS condition. Troubleshoot the FE alarm or condition by troubleshooting the main
alarm at its source. The secondary alarms or conditions clear when the main alarm clears.

Clear the FE-DS1-MULTLOS Condition

Step1 To troubleshoot an FE condition, determine which node and card link directly to the port reporting the
FE condition.
Step2 Log into the node that links directly to the port reporting the FE condition.
Step3 Clear the main alarm. Refer to the appropriate alarm section in this chapter for troubleshooting
instructions.