Nortel Networks Circuit Card 311 User Manual
Page 788
788
NT8D15 E and M Trunk card
Table 304
E and M Trunk card - jumper strap settings
Mode of operation (Note 2)
2-wire trunk
4-wire trunk
DX tip & ring pair
Jumper
(Note 1)
Type I
Paging
Type I
Type II
M—rcv
E—xmt
E—rcv
M—xmt
J1.X
Off
Off
Off
Off
Pins 1–2
Pins 2–3
J2.X
On
On
(Note 3)
On
On
Off
Off
J3.X
Off
Off
Off
Off
(Note 4)
(Note 4)
J4.X
Off
Off
Off
Off
Pins 2–3
Pins 1–2
J5.X
Off
Off
Off
Off
(Note 4)
(Note 4)
J6.X
Off
Off
Off
Off
On
On
J7.X
Off
Off
Off
Off
On
On
J8.X
Off
Off
Off
Off
On
On
J9.X
Pins 2–3
Pins 2–3
Pins 2–3
Pins 2–3
Pins 1–2
Pins 1–2
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
Table 304 "E and M Trunk card - jumper strap
.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.