Check Optical Fiber Specifications; Check Alarm Conditions; Check Led Indicators - Cisco ASR-920-20SZ-M Hardware Installation Manual

Troubleshooting Aids
Pi n
A 3
A 4
Note USB TYPE-A receptacle is used.
Note
The USB MEM port +5VDC is output. Cisco ASR 920 Router provides power for USB MEM port. This port
operates as a USB host device.

Check Optical Fiber 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

Check Alarm Conditions

The following table summarizes the meaning of the alarm conditions on the Cisco ASR 920 Router.
Table 14: Alarm Condition Summary
Alarm
Type
Critical
Major
Info

Check LED Indicators

This section describes the different types of front panel LEDs and their behavior.
Signal Description
Name
D+ Data +
Gnd Ground
Alarm Meaning
Port in down state.
Environmental sensor threshold exceeded critical level (voltage, temperature)
Environmental sensor threshold exceeded major level (voltage, temperature)
Port administratively shut down.
Cisco ASR-920-20SZ-M Aggregation Services Router Hardware Installation Guide
Check Optical Fiber Specifications
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