Nortel Networks 1000 User Manual

Page 422

422

NT8D02 and NTDK16 Digital Line cards

The NTDK16 digital line card contains a microprocessor that provides the
following functions:

•

self-identification

•

self-test

•

control of card operation

•

status report to the controller

•

maintenance diagnostics

The card also provides:

•

Ability to support Digital sets and the Digital Console M2250

•

Provides a serial link (Card LAN) for status report and maintenance.

•

Supports loop lengths up to 3500 ft. (1.0 km) using 24 AWG wire.

Interface between three DS30X loops and 48 TCM lines. The digital line
card is equipped with 16 identical digital line interfaces. Each interface
provides a multiplexed voice, data, and signaling path to and from a digital
terminal (telephone) over a 2-wire full duplex 512 kHz Time Compression
Multiplexed (TCM) digital link. Each digital telephone and associated data
terminal is assigned a separate Terminal Number (TN) in the system
database, giving a total of 32 addressable units per card. The digital line
card supports Nortel Networks’ Meridian Digital Telephone.

Figure 111 "Digital line card - block diagram" (page 424)

shows a block

diagram of the major functions contained on the digital line card. Each of
these functions are described on the following pages.

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

02.06

Standard

27 August 2008