Nortel Networks 553-3001-211 manual Timp

Option settings Page 103 of 894

Table 13

OPS analog line card configuration (Part 2 of 3)

Application	On-premise station (ONS)				Off-premise station (OPS)
Class of Service		ONP				OPX
(CLS) (Note 1)
Loop loss (dB)	0–1.5	>1.5–2.5	>2.5–3.0	0–1.5		>1.5–2.5	>2.5–4.5	>4.5–15
(Note 3)
TIMP	600	600	600	600		600	600	600
(Notes 1, 4)	ohms	ohms	ohms	ohms		ohms	ohms	ohms

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:

	ONP CLS	OPX CLS
TIMP:	600 ohms	600 ohms
BIMP:	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:

Jumper pin

Jumper strap

Jumper block

553-5924

Circuit Card Description and Installation