4000 Router Series Interface Module Guide

LED Descri

tion

LP/AL

• ON means the interface is in a loopback.

• OFF means no loopback or alarm is present.

• Flashing means an alarm indication signal (AIS), loss of frame alignment (LFA)

signal, or remote alarm indication (RAI) signal is present.

Interface cables and the connection methods

For more information about E1 interface cables, see "E1 interface."

HMIM-2T1/HMIM-4T1-F

Introduction

The 2-port channelized CT1/PRI interface module (HMIM-2T1) serves to transmit/receive and handle T1

data streams, provide CT1 access, and fulfill the function of ISDN PRI. Thereby, one module can be used

for multiple purposes.

The 4-port fractional T1 interface module (HMIM-4T1-F) is different from the HMIM-CT1 module in the

sense that:

• FT1 operating mode supported by T1-F modules allows only one bundle. In other words, the time

slots can only be bundled into one n x 64 Kbps/56 Kbps channel, where the value range of n is 1

to 24. However, a CT1 module allows of arbitrary grouping of the 24 channels.

• T1-F does not support PRI mode.

NOTE:

Given a T1 module, the system automatically creates a serial interface for each timeslot bundle formed on

a controller T1 interface.

Interface specifications

Table 117 HMIM-2T1/HMIM-4T1-F interface specifications

Item Description

Connector type RJ45

Number of connectors

• 2 (HMIM-2T1)

• 4 (HMIM-4T1-F)

Interface standard

• G.703/T1 102

• G.704

• AT & T TR 54016

• AT & T TR 62411

• ANSI T1.403

Interface rate 1.544 Mbps

cable type T1 cable (100-ohm shielding network cable)

Operating mode

CT1, ISDN PRI (only supported by the HMIM-2T1)

FT1 (only supported by the HMIM-4T1-F)