Meridian Nortel 1 Option 11C Technical Reference Manual page 428

Page 428 of 544
Table 133
OPS analog line card configuration
Application
Class of service
Loop resistance
Jumper strap set-
b
ting
c
Loop loss dB
TIMP
BIMP
e
Gain treatment
a. Configured in the Single line 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:
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.
553-3011-100 Standard 14.00
NT1R20 Off Premise Station (OPS) analog line card
Port-to-port loss configuration
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 Meridian 1
PE or IPE ports.
The transmission properties of each line unit are characterized by the OPS or
ONS class-of-service assigned in the Single-line Telephone Administration
program (LD10).
On-premise station (ONS)
ONS
0 - 460 ohm
Both JX. 0 and JX 1 off
0-1.5 >1.5-
2.5
600 600
ohm ohm
600 3COM
ohm
January 2002
Off-premise station (OPS)
Both JX. 0 and JX.
1 off
>2.5- 0-1.5
3.0
600 600
ohm ohm
3CM2 600
ohm
No
ONS CLS
TIMP: 600 ohm
BIMP: 600 ohm
OPS
0 - 2300 ohm
Both JX. 0 and JX.
1 on
>1.5- >2.5-
2.5 4.5
600 600
ohm ohm
3COM 3CM2
OPS CLS
600 ohm
3COM2
>4.5-15
600
ohm
3CM2
Yes