Nortel Networks 311 Jumper strap settings

Conﬁguration 693

Balance network for loop lengths (Note 2)

Trunk types

Terminating

impedance

(Note 1) 0–915 m

(0–3000 ft) 915–1524 m

(3000–5000 ft) > 1524 m

(> 5000 ft)

RAN: continuous

operation mode 600 or 900

ohms 600 or 900 ohms N/A N/A

Paging 600 ohms 600ohms N/A N/A

Note 1: The terminating impedance of each trunk unit is software selectable in LD 14 and should

match the nominal impedance of the connecting equipment.

Note 2: The balance network of each trunk unit is software selectable between resistive 600 or

900 ohms or 3COM and jumper selectable between 3COM and 3CM2. Jumper selection for

3COM/3CM2 restriction does not apply to NT8D14BB.

The trunk type for each uniton the card as well as itster minating impedance

and balance network conﬁguration is selected by software service change

entries at the system terminal and by jumper strap settings on the card.

NT8D14BB (Release 10 and higher) has a reduced jumper strap setting

on the card. There are only three jumpers, J1.X, J2.X, and J3.X per

channel. Table255 "Jumper strap settings - factory standard (NT8D14BA,

NT8D14BB)" (page 698),Table256 "Jumper strap settings - extended

range (NT8D14BA, NT8D14BB, NT8D14BB Release 10 and up)" (page

698), and Table257 "Trunk types - termination impedance and balance

network (NT8D14BA, NT8D14BB)" (page 699) show the functionality of

these 3 jumpers.

The trunk type for each uniton the card as well as itster minating impedance

and balance network conﬁguration is selected by software service change

entries at the system terminal and by jumper strap settings on the card.

NT8D14BB (Release 10 and higher) has a reduced jumper strap setting

on the card. There are only three jumpers, J1.X, J2.X, and J3.X on each

channel. Table255 "Jumper strap settings - factory standard (NT8D14BA,

NT8D14BB)" (page 698),Table256 "Jumper strap settings - extended

range (NT8D14BA, NT8D14BB, NT8D14BB Release 10 and up)" (page

698), and Table257 "Trunk types - termination impedance and balance

network (NT8D14BA, NT8D14BB)" (page 699) show the functionality of

these three jumpers.

Jumper strap settings

For most applications, the jumper strap settings remain set to the standard

conﬁguration as shipped from the factory. See Table 250 "Jumper strap

settings - factory standard (NT8D14BA, NT8D14BB)" (page 691).

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 01.04 Standard

Release 5.0 23 May 2008