Bit Errors Appear For An Optical Traffic Card; Faulty Fiber-Optic Connections; Verify Fiber-Optic Connections; Table 1-23 Bit Errors Appear For A Traffic Card - Cisco ONS 15600 SDH Troubleshooting Manual

1.9.1 Bit Errors Appear for an Optical Traffic Card

1.9.1 Bit Errors Appear for an Optical Traffic Card
Symptom
Table 1-23
Table 1-23
Possible Problem
Faulty cabling
Low optical-line power
High optical-line power

1.9.2 Faulty Fiber-Optic Connections

Symptom
Table 1-24
Table 1-24
Possible Problem
Faulty fiber-optic
connections to the
optical (STM-N) card
Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into
Warning
beams or view directly with optical instruments. Statement 1051
Invisible laser radiation may be emitted from the end of the unterminated fiber cable or connector. Do
Warning
not view 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 may pose an eye
hazard. Statement 1056

Verify Fiber-Optic Connections

Ensure that a single-mode fiber connects the ONS 15600 SDH optical (STM-N) port(s).
Step 1
SM or SM Fiber should be printed on the fiber span cable. ONS 15600 SDH optical (STM-N) cards do
not use multimode fiber.
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
1-70
An optical traffic card has multiple bit errors.
describes the potential causes of the symptom and the solutions.
Bit Errors Appear for a Traffic Card
Solution
Bit errors on line (traffic) ports usually originate from cabling problems or
low or high optical-line power levels. The errors can be caused by
synchronization problems, especially if PJ (pointer justification) errors are
reported. Troubleshoot cabling problems using the
Troubleshooting Tests" section on page
optical-line power levels using the
section on page
An optical (STM-N) card has multiple SDH alarms or signal errors.
describes the potential cause of the symptom and the solution.
Faulty Fiber-Optic Connections
Solution
Faulty fiber-optic connections can be the source of SDH alarms and signal
errors. See the
1-2. Troubleshoot low or high
"1.9.2 Faulty Fiber-Optic Connections"
1-70. Use a test set whenever possible to check for errors.
"Verify Fiber-Optic Connections" procedure on page
Chapter 1 General Troubleshooting
"1.1 Network
1-70.
July 2010