Nortel NT1R20 Description page 310

Page 286 of 290
loop limits
NT1R20 Off-Premise Station (OPS) Analog
Line Card 60
NT8D02 Digital Line Card 206
NT8D09 Analog Message Waiting Line Card
220
QPC192 Off-Premise Extension (OPX)
Analog Line Card 233
QPC452 Basic 500/2500 Analog Line Card
245, 246
QPC578 Integrated Services Digital Line Card
(ISDLC) 258
M
MDF (main distribution frame)
connecting line cards 14
surge voltage protection 259
Meridian 1 systems
architecture 4
related documentation 1
message waiting handling
analog line calls 34, 37
analog line interface units 29, 31
characteristics of line cards 7, 8, 9, 10
QPC789 16-port Message Waiting Analog
Line Card 269
SL-1 Network loops 28
microcontrollers 15, 16
on NT1R20 Off-Premise Station (OPS) Analog
Line Card 56, 58
on NT8D02 Digital Line Card 202, 204
on NT8D09 Analog Message Waiting Line
Card 217, 218
modems
line cards for 9, 10
with NT8D09 Analog Message Waiting Line
Card 213
MSB (most significant bit) 26
553-3001-105 Standard 5.00 June 1999
multiplex control
QPC192 Off-Premise Extension (OPX)
Analog Line Card 232
QPC452 Basic 500/2500 Analog Line Card
244
QPC578 Integrated Services Digital Line Card
(ISDLC) 257
QPC789 16-port Message Waiting Analog
Line Card 269
N
network equipment circuit cards 4
NT1R20 Off-Premise Station (OPS) Analog Line
Card
analog line electrical characteristics 60
applications 69, 70
transmission considerations 71, 73
configuration
jumper straps 65, 67
port-to-port loss 68, 71
software service changes 65, 66
connector pin assignments 63, 64
description 7, 8, 49, 51, 53
environmental specification 62
faceplate 54, 55
foreign and surge voltage protection 61
functions
card control 58, 59
card interfaces 57
circuit power 59
codecs 56, 57
line interface units 57
power requirements 61
ring limitations 62
NT5D11 Line Side T-1 Card
description 8
NT5D11 Line Side T-1 Line Card
description 7