Nortel Networks 1000M - Manual (Page 203)

Circuit cards 203
Table 28 "OPS analog line card configuration" (page 203) provides OPS
analog line card configuration information.
Table 28
OPS analog line card configuration
Application On-premise station (ONS) Off-premise station (OPS)
Class of service
(Note 1) ONS OPS
Loop resistance 0–460 ohms 0–2300 ohms
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 1. –2.5 2.5–3.0 0–1.5 1.5–2.5 2.5–3.0 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
3COM1 3COM2 600
ohms
3COM1 3COM2 3COM2
Gain treatment (Note 5) No Yes
Note 1: Configured in the Single line Telephone Administration program (LD 10).
Note 2: The maximum signaling range supported by the OPS analog line card is 2300 ohms.
Note 3: Loss of untreated (no gain devices) metallic line facility. Upper loss limits correspond to
loop resistance ranges for 26 AWG wire.
Note 4: Default software impedance settings are:
CLS ONS OPS
TIMP 600 ohms 600 ohms
BIMP 600 ohms 3COM2
Note 5: Gain treatment, such as a voice frequency repeater (VFR), is required to limit the actual
OPS loop loss to 4.5 dB, maximum. VFR treatment of metallic loops having untreated loss greater
than 15 dB (equivalent to a maximum signaling range of 2300 ohms on 26 AWG wire) is not
recommended.
Note 6: Jumper strap settings JX.0 and JX.1 apply to all eight units; "X" indicates the unit number,
0–7. "OFF" indicates that a jumper strap is not installed across both pins on a jumper block. Store
straps that are not in use on the OPS analog line card by installing them on a single jumper pin as
shown in
Figure 96 "OPS analog line card: jumper block locations" (page 204) .
Nortel Communication Server 1000
Communication Server 1000M and Meridian 1 Small System Installation and Commissioning
NN43011-310 01.04 Standard
Release 5.0 13 May 2008
Copyright © 2008, Nortel Networks
.