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Checklist of Common T3 Alarms and Errors

Purpose

Table 19 provides links and commands for most common T3 alarms and errors you can encounter when investigating line problems on a Juniper Networks router.

Action

Table 19: Checklist of Common T3 Alarms and Errors

Tasks

Command or Action

Display T3 Alarms and Errors

show interfaces t3-fpc/pic/port extensive

Locate Most Common T3 Alarms and Errors  
  1. Locate Loss of Signal and Loss of Frame Alarms

Check the connection between the router port and the first T3 network element.

  1. Locate Alarm Indication Signal Alarms

Check the T3 network element connected to the T3 interface.

  1. Locate an Incoming Yellow Alarm

Check the cable between the T3 interface and the directly connected T3 network element.

  1. Locate IDLE on a T3 Interface

Check that the line is provisioned for service.

Note: T3 is a general term used to refer to the transmission of 44.736-Mbps digital circuits over any media. T3 can be transported over copper, fiber, or radio. DS3 is the term for the electrical signal found at the metallic interface for this circuit where most of the testing is performed.


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