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Cisco ONS 15327 Troubleshooting Guide, R3.4
March 2004
Chapter 2 Alarm Troubleshooting
Alarm Procedures
2.6.102 LOCKOUT-REQ
• Not Alarmed (NA), Non-Service Affecting (NSA)
The Lock Out Switch Request on Facility/Equipment (LOCKOUT-REQ) condition occurs when a user
initiates a lock out switch request for an OC-N card or a lock out switch request on a UPSR at the path
level. A lock out prevents protection switching. Clearing the lock out again allows protection switching
and clears the LOCKOUT-REQ condition.
Procedure: Clear the LOCKOUT-REQ Condition
Step 1 Complete the “Clear a UPSR Lock Out” procedure on page 2-127.
Step 2 If the condition does not clear, log onto http://www.cisco.com/tac for more information or call TAC
(1-800-553-2447).
2.6.103 LOCKOUT-REQ-RING
• Not Alarmed (NA), Non-Service Affecting (NSA)
The Lock Out Switch Request Ring (LOCKOUT-REQ-RING) condition occurs when a LOCKOUT
RING command is applied to a BLSR to prevent all protection switching on the ring.
Procedure: Clear the LOCKOUT-REQ-RING Condition
Step 1 Complete the “Clear a BLSR Span Lock Out” procedure on page 2-127.
Step 2 If the condition does not clear, log onto http://www.cisco.com/tac for more information or call TAC
(1-800-553-2447).
2.6.104 LOF (BITS)
• Major (MJ), Service Affecting (SA)
The Loss of Frame (LOF) BITS alarm occurs when a port on the XTC BITS input detects an LOF on the
incoming BITS timing reference signal. LOF indicates that the receiving ONS 15327 has lost frame
delineation in the incoming data.
Caution Always use the supplied electrostatic discharge wristband when working with a powered ONS 15327.
Plug the wristband cable into the ESD jack located between the top high-speed and XTC slots.
Note The procedure assumes that the BITS timing reference signal is functioning properly. It also assumes
that the alarm is not appearing during node turn up.