Port-To-Port Loss Configuration - Avaya Nortel Communication Server 1000 Reference

NT1R20 Off-Premise Station Analog Line card
Application
Loop
resistance
Jumper
strap
b
setting
Loop loss
c
dB
TIMP
BIMP
Gain
treatment
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.
c. Loss of untreated (no gain devices) metallic line facility. Upper loss limits correspond to
loop resistance ranges for 26 AWG wire.
d. Default software impedance settings are:
TIMP:
BIMP:
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.

Port-to-port loss configuration

The loss plan for the NT1R20 OPS analog line card determines port-to-port loss for
connections between an OPS analog line card unit (port) and other ports.
The transmission properties of each line unit are characterized by the OPS or ONS class of
service assigned in the Analog (500/2500-type) Telephone Administration program LD 10.
The OPS analog line card provides transmission loss switching for control of end-to-end
connection loss. Control of loss is a major element in controlling transmission performance
parameters such as received volume, echo, noise, and crosstalk. The loss plan for the OPS
analog line card determines port-to-port loss for connections between an OPS analog line card
unit (port) and other IPE ports. LD 97 is used to configure systems for port-to-port loss.
124 Circuit Card Reference
On-premise station (ONS)
0 - 460 ohm
Both JX. 0 and JX 1 off
0-1.5 >1.5-2.5
600 ohm 600 ohm 600 ohm 600 ohm 600 ohm 600 ohm 600 ohm
600 ohm 3COM
e
ONS
600 ohm
600 ohm
Comments? infodev@avaya.com
Off-premise station (OPS)
Both JX. 0 and JX. 1
off
>2.5-3.0 0-1.5 >1.5-2.5
3CM2 600 ohm 3COM
No
CLSOPS
0 - 2300 ohm
Both JX. 0 and JX. 1
on
>2.5-4.5 >4.5-15
3CM2 3CM2
Yes
CLS
600 ohm
3COM2
July 2011