Nortel Networks Option 11C Mini manual Timp

Chapter 12 — Installing the circuit cards Page 165 of 332

Table 33 provides OPS analog line card configuration information.

Table 33

OPS analog line card configuration

Application	On-premise station (ONS)				Off-premise station (OPS)
Class of service			ONS				OPS
(Note 1)
Loop resistance		0 - 460 ohms					0 - 2300 ohms
Jumper strap	Both JX. 0 and JX.1 off				Both JX. 0 and JX.			Both JX. 0 and JX.
setting						1 off		1 on
(See Note 6)
Loop loss dB	0-1.5		>1.5-2.5	2.5-3.0	0-1.5		1.5-2.5	2.5-3.0	4.5-15
(See Note 3)
TIMP	600¾		600¾	600¾	600¾		600¾	600¾	600¾
(See Notes 1, 4)
BIMP	600¾		3COM1	3COM2	600¾		3COM1	3COM2	3COM2
(See Notes 1, 4)
Gain treatment				No					Yes
(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.

Option 11C Mini Planning and Installation Guide