Nortel Networks Video Gaming Accessories 553-3001-211 Manual De Usuario

 Option settings

Table 13 lists option settings for the NT1R20 Off-Premise Station analog 
card.

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

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.

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:

600 ohms

600 ohms

600 ohms

3COM2

Note: 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: 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 as shown below:  

553-5924

Jumper block

Jumper strap

Jumper pin