Nortel Circuit Card 311 Reference page 94

94 Option settings
Table 32
NT8D14 vintages BA/BB jumper strap settings-extended range
Trunk types
CO/FX/WATS
2-way tie (LDR)
2-way tie (OAID)
DID
RAN: pulse start or level
start modes
Note: 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.
Table 33
NT8D14 vintages BA/BB trunk types-termination impedance and balance network
Terminating
impedance
Trunk types (Note 1)
CO/FX/WATS 600 or 900 ohms
2-way tie (LDR) 600 or 900 ohms
2-way tie (OAID) 600 or 900 ohms
DID (loop < 600 600 or 900 ohms
ohms)
DID (loop ˇ S 600 600 or 900 ohms
ohms)
RAN: continuous 600 or 900 ohms
operation mode
Paging 600 ohms
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 is jumper selectable between 3COM1 and 3COM2.
Copyright © 2003-2008, Nortel Networks
.
Loop length
> 1524 m (5000 ft)
> 600 ohms
Not applicable: RAN
trunks should not leave the
building.
Balance network for loop lengths (Note 2)
Zero–915 m
(zero–3000 ft)
600 ohms
600 ohms
600 ohms
600 ohms
600 ohms
600 or 900 ohms
600 ohms
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Jumper strap settings
J1.X J2.X J3.X
1–2
Off Off
1–2
On On
Off Off 2–3
915–1524 m
(3000–5000 ft)
3COM1
3COM1
3COM1
3COM1
N/A
N/A
N/A
J4.X
2–3
2–3
1–2
> 1524 m
(> 5000 ft)
3COM2
3COM2
3COM2
3COM2
3COM2
N/A
N/A