125FIC-1CT3IntroductionThe 1-port channelized/non channelized T3 interface module (FIC-1CT3) delivers these functions:• In T3 mode, transmitting, receiving, and processing one channel of T3 fast traffic; providing T3traffic access.• In CT3 mode, providing the subscribers with N No 64 kbps or N No 56 kbps low-speed access,where N is smaller than or equal to 128.NOTE:T3 represents the tertiary group rate of T system in the TDM system, that is, 44.736 Mbps. ThroughT23 and T12A demultiplexing, a T3 channel can be channelized into 28 T1 lines, each alsosupporting the operating mode of CT1. T23 means either T2-to-T3 multiplex or T3-to-T2demultiplex, and T12 means T1-to-T2 multiplex or T2-to-T1 demultiplex. "T23" and "T12" discussedhere represent the demultiplex process.Interface specificationsTable 170 Interface specificationsItem DescriptionConnector SMBNumber of connectors 2Interface standard• G.703• G.704• G.752• AT & T TR 54014• AT & T TR 62415• ANSI T1.107Interface rate 44.736 MbpsCable T3 cable (75-ohm coaxial cable)Operating mode T3CT3Supported service T3 leased lineInterface LEDsFigure 143 FIC-1CT3 panel
