Nortel Networks 311 User Manual
Functional description
133
LD 10 is also used to select unit terminating impedance and balance network
impedance at the TIMP and BIMP prompts, respectively. The message
waiting interrupted dial tone and call forward reminder tone features are
enabled by entering data into the customer data block using LD 15.
impedance at the TIMP and BIMP prompts, respectively. The message
waiting interrupted dial tone and call forward reminder tone features are
enabled by entering data into the customer data block using LD 15.
See Software Input/Output Reference — Administration (NN43001-611) for
LD 10 and LD 15 service change instructions.
LD 10 and LD 15 service change instructions.
Table 62
OPS analog line card configuration
OPS analog line card configuration
Application
On-premise station (ONS)
Off-premise station (OPS)
Class of
service
ONS
OPS
Loop resist
ance
0 - 460 ohm
0 - 2300 ohm
Jumper strap
setting
b
Both JX. 0 and JX 1 off
Both JX. 0 and JX.
1 off
Both JX. 0 and JX.
1 on
Loop loss dB
c
0-1.5
>1.5-2.5
>2.5-3.0
0-1.5
>1.5-2.5
>2.5-4.5
>4.5-15
TIMP
600
ohm
600
ohm
600
ohm
600
ohm
600
ohm
600
ohm
600
ohm
BIMP
600
ohm
3COM
3CM2
600
ohm
3COM
3CM2
3CM2
Gain treatm
ent
e
No
Yes
a. Configured in the Analog (500/2500-type) Telephone Administration program (LD 10).
b. 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 unused
straps on the OPS analog line card by installing them on a single jumper pin.
"OFF" indicates that a jumper strap is not installed across both pins on a jumper block. Store unused
straps on the OPS analog line card by installing them on a single jumper pin.
c. Loss of untreated (no gain devices) metallic line facility. Upper loss limits correspond to loop
resistance ranges for 26 AWG wire.
resistance ranges for 26 AWG wire.
d. Default software impedance settings are:
ONS CLSOPS CLS
TIMP:600 ohm600 ohm
BIMP:600 ohm3COM2
ONS CLSOPS CLS
TIMP:600 ohm600 ohm
BIMP:600 ohm3COM2
e. 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 15dB
(equivalent to a maximum signaling range of 2300 ohm on 26 AWG wire) is not recommended.
loss to 4.5 dB, maximum. VFR treatment of metallic loops having untreated loss greater than 15dB
(equivalent to a maximum signaling range of 2300 ohm on 26 AWG wire) is not recommended.
Individual line interface units on the OPS analog line card are configured
to either OPS (for OPS application) or ONS (for ONS application) Class of
Service (CLS) in the Single-line Telephone Administration program (LD10)
(see
to either OPS (for OPS application) or ONS (for ONS application) Class of
Service (CLS) in the Single-line Telephone Administration program (LD10)
(see
). LD10
is also used to select unit terminating impedance and balance network
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.