4000 Router Series Interface Module Guide

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Figure 119 FIC-4T1-F panel

The following table describes the LEDs on the module panels.

Table 164 LEDs on the FIC-4T1-F panel

LED Descri

tion

LINK/ACT

• ON means the carrier signal has been received.

• OFF means no carrier signal has been received.

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

LP/AL

• ON means the interface is in a loopback.

• Flashing means an AIS, LFA, or RAI alarm signal is present.

• OFF means no loopback or alarm is present.

Note:

AIS = Alarm indication signal; LFA = loss of frame alignment; RAI = Remote alarm indication

Interface cables and the connection methods

For more information about T1 interface cables, see "T1 interface."

E3/T3 interface module

• FIC-1CE3

• FIC-1CT3

FIC-1CE3

Introduction

FIC-1CE3, the 1-port channelized E3/fractional E3 interface module, delivers these functions:

• In E3 mode, transmitting, receiving, and processing one channel of E3 fast traffic; providing E3

traffic access.

• In CE3 mode, providing the subscribers with N x 64 kbps low-speed access, where N is smaller

than or equal to 128.

NOTE:

E3 represents the tertiary group rate of E system in the TDM system, that is, 34.368 Mbps. Throu

h E23

and E12 demultiplexin

, an E3 channel can be channelized into 16 E1 lines, each supportin

both the E1

and CE1 modes. E23 means either E2-to-E3 multiplex or E3-to-E2 demultiplex, and E12 means E1-to-E2

multiplex or E2-to-E1 demultiplex. "E23" and "E12" discussed here represent the demultiplex process.

Interface attributes

The following table describes the interface attributes of the FIC-1CE3/FIC-2CE3.