Fiber-Optic Specifications - Cisco ASR 903 Troubleshooting Manual

Fiber-Optic Specifications

Fiber-Optic Specifications
The specification for optical fiber transmission defines two types of fiber: single-mode and multimode. Within
the single-mode category, three transmission types are defined: short reach, intermediate reach, and long
reach. Within the multimode category, only short reach is available. For information about optical SFP modules,
see the documentation for the SFP module at:
http://www.cisco.com/en/US/partner/products/hw/modules/ps5455/prod_installation_guides_list.html .
Cabling Guidelines
The guidelines are recommended during the installation of fiber cables:
• Avoid the following actions that can stress the cable:
• Do not touch the fiber tips of fiber cables.
• Use single mode or multi-mode optical fiber cables as per the optical transceiver requirement.
• Use fiber cleaner to clean the fiber tip as well as transceiver before inserting the fiber cable into the
• To avoid excessive bending of fiber cable and efficient routing of cables, cable guides or cable brackets
LED Summary
The following sections describe the meanings of the LEDs on the Cisco ASR 903 Router.
RSP LEDs
The table below summarizes the RSP LEDs for the supported RSP modules.
A major alarm condition indicates the failure of a single fan in the fan tray; a critical alarm indicates the
Note
failure of multiple fans. In the event that a single fan fails, the Cisco ASR 903 Router software adjusts
the fan speed to prevent excessive heat within the chassis.
Cisco ASR 903 Aggregation Services Router Hardware Installation Guide
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◦ Pulling or stretching beyond the specified pulling load rate
◦ Bending it beyond the specified bend radius
◦ Creating tension in the suspension runs
optical transceiver during installation.
are recommended to be used with the chassis.
Troubleshooting