Meridian Nortel 1 Option 11C Mini Installation Manual page 165

Table 33
OPS analog line card configuration
Application
Class of service
(Note 1)
Loop resistance
Jumper strap
setting
(See Note 6)
Loop loss dB
(See Note 3)
TIMP
(See Notes 1, 4)
BIMP
(See Notes 1, 4)
Gain treatment
(See Note 5)
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:
ONS CLSOPS CLS
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 15dB
(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 46.
Chapter 12 — Installing the circuit cards
Table 33 provides OPS analog line card configuration information.
On-premise station (ONS)
ONS
0 - 460 ohms
Both JX. 0 and JX.1 off
0-1.5 >1.5-2.5
600¾ 600¾
600¾ 3COM1
Off-premise station (OPS)
Both JX. 0 and JX.
1 off
2.5-3.0 0-1.5
600¾ 600¾
3COM2 600¾
No
Option 11C Mini
Page 165 of 332
OPS
0 - 2300 ohms
Both JX. 0 and JX.
1 on
1.5-2.5 2.5-3.0
600¾ 600¾
3COM1 3COM2
Planning and Installation Guide
4.5-15
600¾
3COM2
Yes