Nortel Networks 553-3001-211 manual Configuring the OPS analog line card, Jumper strap settings

Page 172 of 894 NT1R20 Off-Premise Station Analog Line card

Configuring the OPS analog line card

The line type, terminating impedance, and balance network configuration for each unit on the card is selected by software service change entries at the system terminal and by jumper strap settings on the card.

Jumper strap settings

Each line interface unit on the card is equipped with two jumper blocks that are used to select the proper loop current depending upon loop length. See Table 70.

For units connected to loops of 460 to 2300 ohms, both jumper blocks for that unit must have jumper blocks installed. For loops that are 460 ohms or less, jumper blocks are not installed. Figure 24 on page 174 shows the location of the jumper blocks on the OPS analog line card.

Table 70

OPS analog line card – configuration (Part 1 of 2)

Application	On-premise station (ONS)				Off-premise station (OPS)
Class of Service		ONP				OPX
(CLS) (Note 1)
Loop resistance		0–460				0–2300 (Note 2)
(ohms)
Jumper strap	Both JX.0 and JX.1			Both JX.0 and JX.1			Both JX.0 and JX.1
setting (Note 6)	off			off			on
Loop loss (dB)	0–1.5	>0–3.0	>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
BIMP	600	3COM	3CM2	600		3COM	3CM2	3CM2
(Notes 1, 4)	ohms			ohms

553-3001-211 Standard 2.00 September 2004