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Locate T1 Alarms and Errors

This chapter describes the most common T1 alarms and errors encountered when investigating line problems on a Juniper Networks router. (See Table 10.)


Table 10: Checklist for T1 Alarms and Errors
T1 Alarms and Errors Tasks
Command or Action

show interfaces t1-fpc/pic/port extensive


  1. Locate Loss of Signal and Loss of Frame Alarms

Check the connection between the router port and the first T1 network element.

  1. Locate Alarm Indication Signal Alarms

Check the T1 network element connected to the T1 interface.

  1. Locate an Incoming Yellow Alarm

Check the cable between the T1 interface and the directly connected T1 network element.



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