Nortel Networks 311 User Manual
704
NT8D14 Universal Trunk card
Table 260
Jumper strap settings - extended range (NT8D14BA, NT8D14BB, NT8D14BB Release 10 and
later)
Jumper strap settings - extended range (NT8D14BA, NT8D14BB, NT8D14BB Release 10 and
later)
Jumper strap settings (Note 1)
Trunk types
Loop length
J1.X
J2.X
J3.X
J4.X
(Note 2)
(Note 2)
CO/FX/WATS
2-way tie (LDR)
2-way tie (OAID)
> 1524 m (5000 ft)
Off
Off
1–2
2–3
DID
> 600 ohms
On
On
1–2
2–3
RAN: pulse start or
level start modes
level start modes
Not applicable: RAN
trunks should not leave
the building.
trunks should not leave
the building.
Off
Off
2–3
1–2
Note 1: Jumper strap settings J1.X, J2.X, J3.X, and J4.X apply to all eight units; "X" indicates the
unit number, 0–7. "Off" indicates that no jumper strap is installed on a jumper block.
unit number, 0–7. "Off" indicates that no jumper strap is installed on a jumper block.
Note 2: For the NT8D14BB Release 10 or later card, J4.X is not provided on the board. The
J4.X jumper setting specified in
J4.X jumper setting specified in
does not apply.
Table 261
Trunk types - termination impedance and balance network (NT8D14BA, NT8D14BB)
Trunk types - termination impedance and balance network (NT8D14BA, NT8D14BB)
Balance network for loop lengths (Note 2)
Trunk types
Terminating
impedance
(Note 1)
impedance
(Note 1)
0–915 m
(0–3000 ft)
(0–3000 ft)
915–1524 m
(3000–5000 ft)
(3000–5000 ft)
> 1524 m
(> 5000 ft)
(> 5000 ft)
CO/FX/WATS
600 or 900
ohms
ohms
600 ohms
3COM
3CM2
2-way tie (LDR)
600 or 900
ohms
ohms
600 ohms
3COM
3CM2
2-way tie (OAID)
600 or 900
ohms
ohms
600 ohms
3COM
3CM2
DID (loop length <
600 ohms)
600 ohms)
600 or 900
ohms
ohms
600 ohms
3COM
3CM2
DID (loop length ˇ
S
600 ohms)
600 or 900
ohms
ohms
600 ohms
N/A
3CM2
Note: The terminating impedance of each trunk unit is software selectable in LD 14 and should
match the nominal impedance of the connecting equipment.
match the nominal impedance of the connecting equipment.
Note: 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 (Release 10 and later).
900 ohms or 3COM and jumper selectable between 3COM and 3CM2. Jumper selection for
3COM/3CM2 restriction does not apply to NT8D14BB (Release 10 and later).
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.