Channelized DS-3 to DS-1 Interface Naming

You can configure 28 T1 channels per T3 interface, and each interface can have logical interfaces. To specify the channel number, include it after the colon (:) in the interface name. For example, a 4-port T3 PIC in FPC 1 and slot 1 will have the following physical interfaces, depending on the media type:

t1-1/1/0:x

t1-1/1/1:x

t1-1/1/2:x

t1-1/1/3:x

x is a channel number ranging from 0 through 27.