Nortel Networks Circuit Card - Manual (Page 157)

Page 157 of 906
Circuit Card Description and Installation
182
NT1R20 Off-Premise Station
Analog Line card
Contents
This section contains information on the following topics:
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Physical description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Electrical specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Connector pin assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Configuring the OPS analog line card. . . . . . . . . . . . . . . . . . . . . . . . . . 174
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Introduction
The NT1R20 Off-Premise Station (OPS) analog line card is an intelligent
eight-channel analog line card designed to be used with 2-wire analog
terminal equipment such as analog (500/2500-type) telephones and analog
modems.
The NT1R20 Off-Premise Station (OPS) analog line card provides eight
full-duplex analog telephone line interfaces. Each line has integral hazardous
and surge voltage protection to protect the system from damage due to
lightning strikes and accidental power line connections. This card is normally