Nortel Networks Circuit Card 311 User Manual
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582
NT8D14 Universal Trunk card
outgoing call signaling onto the trunk. Signal detection circuits monitor
incoming call signaling. Two CODECs are provided for performing A/D and
D/A conversion of trunk analog voiceband signals to digital PCM signals.
Each Codec supports four trunk interface units. The following features are
common to all units on the card:
•
trunk type configurable on a per unit basis
•
terminating impedance (600 or 900 ohms) selectable on a per-unit basis
(minimum vintage BA)
•
balance impedance (600 or 900 ohms or complex impedance network)
selectable on a per-unit basis (minimum vintage BA)
•
control signals provided for RAN and paging equipment
•
loopback of PCM signals received from trunk facility over DS-30X
network loop for diagnostic purposes
•
switchable pads for transmission loss control
Card control functions
Control functions are provided by a microcontroller, a card LAN interface,
and signaling and control circuits on the NT8D14 Universal Trunk card.
Control functions are provided by a microcontroller, a card LAN interface,
and signaling and control circuits on the universal trunk card.
Control functions are provided by a microcontroller, a card LAN interface,
and signaling and control circuits on the NT8D14 Universal Trunk Card.
Microcontroller
The NT8D14 Universal Trunk card contains a microcontroller that controls
the internal operation of the card and the serial card LAN link to the
controller card. The microcontroller controls the following:
•
reporting to the CE CPU through the card LAN link:
— card identification (card type, vintage, and serial number)
— firmware version
— self-test status
— programmed configuration status
•
receipt and implementation of card configuration through the card LAN
link:
— programming of the codecs
— enabling/disabling of individual units or entire card
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.