Nortel Networks Circuit Card 311 - Manual (Page 506)

506 NT8D02 and NTDK16 Digital Line cards
Functional description
NT8D02 Digital Line card
The NT8D02 Digital Line card is equipped with 16 identical units. Each unit
provides a multiplexed voice, data, and signaling path to and from digital
apparatus 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, 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 126 "Digital line card - block diagram" (page 507) 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 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
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