Locate T3 Alarms and Errors

This chapter describes the most common T3 alarms and errors you can encounter when investigating line problems on a Juniper Networks router. (See Table 16.)

Table 16: Checklist of Common T3 Alarms and Errors

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
Locate Loss of Signal and Loss of Frame Alarms	Check the connection between the router port and the first T3 network element.
Locate Alarm Indication Signal Alarms	Check the T3 network element connected to the T3 interface.
Locate an Incoming Yellow Alarm	Check the cable between the T3 interface and the directly connected T3 network element.
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. DS-3 is the term for the electrical signal found at the metallic interface for this circuit where most of the testing is performed.