Chapter 6 Troubleshooting Serial Lines; Optical Signal Input/Output Problems; Fiber-Optic Connections - Cisco 10000 Series Troubleshooting Manual

Troubleshooting Serial Lines
This chapter describes methods for detecting and correcting data errors on the Cisco 10000 series router
serial interfaces.

Optical Signal Input/Output Problems

Signal input and output problems can occur at any point in the network and can be caused by mechanical
defects in cables or fiber, poor connections, or loss of signal caused by other equipment failures. Refer
to your site log and other facility records to isolate signal connections for your facility.

Fiber-Optic Connections

An optical signal I/O problem can be caused by:
•
•
•
•
•
Be sure to use single-mode fiber for a single-mode interface and multimode fiber for a multimode
interface.
OL-0439-02
Incorrect type of fiber
Defective fiber
Transmit (TX) and Receive (RX) fibers that are reversed
Insufficient power budget on the optical link
Receiver overload on the optical link
Table 6-1 describes the fiber types appropriate for each Cisco 10000 series router line card.
C H A P T E R
Cisco 10000 Series Router Troubleshooting Guide
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