4000 Router Series Interface Module Guide

• Transmit/receive and handle one channel of T3 fast traffic, as well as provide the accessing of T3

traffic when operating in T3 mode.

• Provide the low-speed accessing service at the speed of n x 64 kbps/56 kbps, where "n" is smaller

than or equal to 128, when operating in CT3 mode.

NOTE:

T3 represents the tertiary group rate of T system in the TDM system, that is, 44.736 Mbps. A T3 channel

can be channelized into 28 T1 lines throu

h the demultiplexin

processes of T23 and T12, each T1 line

also supporting the operating modes of CT1. T23 is used to indicate either T2-to-T3 multiplex or T3-to-T2

demultiplex, and T12 to indicate T1-to-T2 multiplex or T2-to-T1 demultiplex. "T23" and "T12" discussed

here represent the demultiplex process.

Interface specifications

Table 121 HMIM-1CT3 interface specifications

Item Description

Connector type SMB

Number of connectors 2

Interface standard

G.703

G.704

G.752

AT & T TR 54014

AT & T TR 62415

ANSI T1.107

Interface rate 44.736 Mbps

Cable type T3 cable (75-ohm coaxial cable)

Operating mode

CT3

Supported services T3 leased line

Interface LEDs

Figure 88 HMIM-1CT3 panel

Table 122 HMIM-1CT3 LED description

LED Descri

tion

LINK/ACT

• ON means carrier signal has been received.

• Flashing means data is being received or/and transmitted.

• OFF means no carrier signal has been received.