Nortel Circuit Card Installation Manual page 660

Page 660 of 906
Table 208
E&M trunk card – jumper strap settings
Jumper
(Note 1) Type I
J1.X
J2.X
J3.X
J4.X
J5.X
J6.X
J7.X
J8.X
J9.X Pins 2–3
Note 1: Jumper strap settings J1.X through J9.X apply to all four units; "X" indicates the unit
number, 0–3.
Note 2: "Off" indicates that no jumper strap is installed on a jumper block.
Note 3: Paging trunk mode is not zone selectable.
Note 4: Jumper strap installed in this location only if external loop resistance is greater than
2500 ohms.
553-3001-211 Standard 3.00
NT8D15 E&M Trunk card
2-wire trunk
Paging
Off Off
On On
(Note 3)
Off Off
Off Off
Off Off
Off Off
Off Off
Off Off
Pins 2–3
August 2005
Mode of operation (Note 2)
Type I Type II
Off Off
On On
Off Off
Off Off
Off Off
Off Off
Off Off
Off Off
Pins 2–3 Pins 2–3
4-wire trunk
DX tip & ring pair
M—rcv
E—xmt
Pins 1–2
Off
(Note 4)
Pins 2–3
(Note 4)
On
On
On
Pins 1–2
E—rcv
M—xmt
Pins 2–3
Off
(Note 4)
Pins 1–2
(Note 4)
On
On
On
Pins 1–2