Nortel Networks 1000 User Manual

Page 420

420

NT8D02 and NTDK16 Digital Line cards

multiplexed (TCM) digital link. Each digital telephone and associated
data terminal is assigned a separate terminal number (TN) in the system
database, for a total of 32 addressable ports per card.

The NT8D02 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’ Meridian Digital
Telephone.

The 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

Figure 109 "Digital line card - block diagram" (page 421)

shows a block

diagram of the major functions contained on the NT8D02 Digital Line card.
Each of these functions is described on the following pages.

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

02.06

Standard

27 August 2008