Configuring The Ops Analog Line Card - Nortel Circuit Card Installation Manual

Page 174 of 906

Configuring the OPS analog line card

Jumper strap settings
Table 71
OPS analog line card – configuration (Part 1 of 2)
Application
Class of Service
(CLS) (Note 1)
Loop resistance
(ohms)
Jumper strap
setting (Note 6)
Loop loss (dB)
(Note 3)
TIMP
(Notes 1, 4)
BIMP
(Notes 1, 4)
553-3001-211 Standard 3.00
NT1R20 Off-Premise Station Analog Line card
The line type, terminating impedance, and balance network configuration for
each unit on the card is selected by software service change entries at the
system terminal and by jumper strap settings on the card.
Each line interface unit on the card is equipped with two jumper blocks that
are used to select the proper loop current depending upon loop length. See
Table 71.
For units connected to loops of 460 to 2300 ohms, both jumper blocks for that
unit must have jumper blocks installed. For loops that are 460 ohms or less,
jumper blocks are not installed. Figure 24 on
the jumper blocks on the OPS analog line card.
On-premise station (ONS)
ONP
0–460
Both JX.0 and JX.1
off
0–1.5 >0–3.0
600 600
ohms ohms
600 3COM
ohms
August 2005
Off-premise station (OPS)
Both JX.0 and JX.1
off
>2.5–3.0 0–1.5
600 600
ohms ohms
3CM2 600
ohms
page 176 shows the location of
OPX
0–2300 (Note 2)
Both JX.0 and JX.1
on
>1.5–2.5 >2.5–4.5
600 600
ohms ohms
3COM 3CM2
>4.5–15
600
ohms
3CM2