Nortel Networks 553-3001-211 manual 518 of 894 NT8D02 and NTDK16 Digital Line cards

Page 518 of 894 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 Networks’ 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 102 on page 519 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.

553-3001-211 Standard 2.00 September 2004