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144 NT1R20 Off-Premise Station Analog Line card
and Meridian 1 Large System Installation and Configuration (NN43021-310)
for more detailed I/O panel connector information and wire assignments
for each tip/ring pair.
Configuring the OPS 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.
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.
Jumper strap settings
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 "OPS analog line card - configuration" (page 144).
For units connected to loops of 460 to 2300 ohms, both jumper blocks must
be installed. For loops that are 460 ohms or less, jumper blocks are not
installed. Figure 24 "OPS analog line card - jumper block locations" (page
146) shows the location of the jumper blocks on the OPS analog line card.
Table 71
OPS analog line card - configuration
Application
On-premise station (ONS) Off-premise station (OPS)
Class of Service
(CLS) (Note 1)
ONP OPX
Loop resistance
(ohms)
0–460
0–2300 (Note 2)
Jumper strap
setting (Note 6)
Both JX.0 and JX.1
off
Both JX.0 and JX.1
off
Both JX.0 and JX.1
on
Loop loss (dB)
(Note 3)
0–1.5 >0–3.0 >2.5–3.0 0–1.5 >1.5–2.5 >2.5–4.5 >4.5–15
TIMP
(Notes 1, 4)
600
ohms
600
ohms
600
ohms
600
ohms
600
ohms
600
ohms
600
ohms
BIMP
(Notes 1, 4)
600
ohms
3COM 3CM2
600
ohms
3COM 3CM2 3CM2
Gain treatment
(Note 5)
No Yes
Note 1: Configured in the Analog (500/2500-type) Telephone Administration program LD 10.
Note 2: The maximum signaling range supported by the OPS analog line card is 2300 ohms.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.