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788 NT8D15 E and M Trunk card
Table 304
E and M Trunk card - jumper strap settings
Jumper
(Note 1)
Type I
J1.X
Off
J2.X
On
J3.X
Off
J4.X
Off
J5.X
Off
J6.X
Off
J7.X
Off
J8.X
Off
J9.X
Pins 2–3
Note: Jumper strap settings J1.X through J9.X apply to all four units; "X" indicates the unit number,
0–3.
Note: "Off" indicates that no jumper strap is installed on a jumper block.
Note: Paging trunk mode is not zone selectable.
Note: Jumper strap installed in this location only if external loop resistance is greater than 2500
ohms.
The NT8D15 E and M Trunk Card serves various transmission requirements.
The four units on the card can operate in A-Law or Mu-Law companding
modes, which are selected by service change entries. Each unit can be
independently configured for 2-wire E and M, 4-wire E and M, and paging
trunk types. The trunk type is selected by service change entries and
jumper strap settings. See
settings" (page
Copyright © 2003-2008, Nortel Networks
.
Mode of operation (Note 2)
2-wire trunk
Paging
Type I
Off
Off
On
On
(Note 3)
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Pins 2–3
Pins 2–3
Table 304 "E and M Trunk card - jumper strap
788).
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
4-wire trunk
DX tip & ring pair
M—rcv
Type II
E—xmt
Off
Pins 1–2
On
Off
Off
(Note 4)
Off
Pins 2–3
Off
(Note 4)
Off
On
Off
On
Off
On
Pins 2–3
Pins 1–2
E—rcv
M—xmt
Pins 2–3
Off
(Note 4)
Pins 1–2
(Note 4)
On
On
On
Pins 1–2
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