Cisco CTX2500 User Manual

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Cisco ONS 15310-MA SDH Troubleshooting Guide, Release 9.0
78-18663-01
Chapter 2 Alarm Troubleshooting
Alarm Procedures
Step 2 If the condition does not clear, log into the Technical Support Website at
http://www.cisco.com/cisco/web/support/index.html for more information or call Cisco TAC
(1-800-553-2447).
2.7.192 LP-DEG
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SDH Logical Objects: VCMON-LP, VCTRM-LP
An LP-DEG condition is similar to the “SD” condition on page 2-122, but it applies to the VC layer of
the SDH overhead.
For SNCP protected circuits, the BER threshold is user-provisionable and has a range for SD from
1E–9 dBm to 1E–5 dBm. An LP-DEG condition does not cause a switch from the working port to the
protect port at the path (VC) level.
The BER increase that causes the alarm is sometimes caused by a physical fiber problem such as a poor
fiber connection, a bend in the fiber that exceeds the permitted bend radius, or a bad fiber splice.
SD causes the port to switch from working to protect. The SD condition clears when the BER level falls
to one-tenth of the threshold level that triggered it.
Clear the LP-DEG Condition
Step 1 Complete the “Clear the SD (E1, DS3) Condition” procedure on page 2-122.
Step 2 If the condition does not clear, log into the Technical Support Website at
http://www.cisco.com/cisco/web/support/index.html for more information or call Cisco TAC
(1-800-553-2447).
2.7.193 SF
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SDH Logical Objects: E1, DS3
A Signal Fail condition occurs when the quality of the signal has exceeded the BER signal failure
threshold. Signal failure is defined by Telcordia as a “hard failure” condition. The SD and SF conditions
both monitor the incoming BER error rate and are similar conditions, but SF is triggered at a higher BER
than SD.
The BER threshold is user-provisionable and has a range for SF from 1E–5 to 1E–3.
Warning Invisible laser radiation could be emitted from the end of the unterminated fiber cable or connector.
Do not stare into the beam directly with optical instruments. Viewing the laser output with certain
optical instruments (for example, eye loupes, magnifiers, and microscopes) within a distance of
100 mm could pose an eye hazard. Statement 1056

Cisco CTX2500 Specifications

General

Brand	Cisco
Model	CTX2500
Category	Network Card
Language	English