Nortel Networks 1000 - Manual (Page 427)

Functional description 427
Card interfaces
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
“Intelligent Peripheral Equipment” (page
21) .
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
“Intelligent Peripheral Equipment” (page
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.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.