Nortel Networks 1000 - 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
Copyright © 2003-2008 Nortel Networks
.