Nortel Networks Video Gaming Accessories 553-3001-211 Manuale Utente
Page 122 of 894
Option settings
NT8D15 E&M Trunk card
Table 35
NT8D15 E&M Trunk card
NT8D15 E&M Trunk card
Jumper
(Note 1)
Mode of operation (Note 2)
2-wire trunk
4-wire trunk
Type I
Paging
Type I
Type II
DX tip & ring pair
M—rcv
M—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 1: Jumper strap settings J1.X through J9.X apply to all 4 units; “X” indicates the unit
number, 0–3.
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 exceeds 2500
ohms.
ohms.
Note 5: Dot next to the jumper block indicates pin 1.