T3 Controllers

A T3 controller on a channelized T3 interface is identified using the slot/port format where:

slot—Number of the slot in which the line module resides in the chassis.
In ERX-7xx models, line module slots are numbered 2-6; slots 0 and 1 are reserved for SRP modules. In ERX-14xx models, line module slots are numbered 0–5 and 8–13; slots 6 and 7 are reserved for SRP modules. In an ERX-310 router, line module slots are numbered 0–2; slot 0 is reserved for the SRP module.
port—Number of the port on the I/O module. On a CT3/T3 12 I/O module, ports are numbered 0–11.

For information about installing line modules and I/O modules in ERX routers, see ERX Hardware Guide, Chapter 4, Installing Modules.