Nortel Circuit Card 311 Reference page 513

The digital line card passes voice, data, and signaling over DS-30X loops
and maintenance data over the card LAN link. These interfaces are
discussed in detail in the section
21).
The NT8D02 Digital Line Card passes voice, data, and signaling over
DS-30X loops, and maintenance data over the card LAN link.
Digital line interfaces
The digital line interface contains two Digital Line Interface Circuits (DLIC).
Each digital line interface circuit provides eight identical, individually
configurable voice and data interfaces to eight digital telephone lines. These
lines carry multiplexed PCM voice, data, and signaling information as TCM
loops.
The purpose of each digital line interface circuit is to de-multiplex data from
the DS-30X Tx channel into eight integrated voice and data bitstreams. The
circuits then transmit those bitstreams as Bi-Polar Return to Zero, Alternate
Mark Inversion (BPRZ-AMI) data to the eight TCM loops. They also perform
the opposite action: they receive eight BPRZ-AMI bitstreams from the TCM
loops and multiplex them onto the DS-30X Rx channel. The two digital line
interface circuits perform the multiplexing and de-multiplexing functions for
the 16 digital telephone lines.
Figure 130
NTDK16 DLC
Copyright © 2003-2008, Nortel Networks
.
"Intelligent Peripheral Equipment" (page
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Functional description 513