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Circuit Card Description and Installation
654
NT8D15 E & M Trunk card
Contents
This section contains information on the following topics:
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 615
Physical description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617
Functional description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 619
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 629
Electrical specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 640
Connector pin assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 642
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 646
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 652
Introduction
The NT8D15 E&M trunk card interfaces four analog telephone trunks to the
switch. Each trunk interface connects to a trunk facility using tip and ring
leads that carry voice, ringing, and tone signaling, and to signaling interfaces
by E&M leads. Each unit can be configured independently by software
control in the Trunk Data Block (or Trunk Administration) program LD 14.
You can install this card in any IPE slot.
Note: Up to four analog trunk cards are supported in each MG 1000S
and four analog trunk cards in each MG 1000S Expansion.