Nortel-networks Circuit Card Manuel d'utilisateur Page 660

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Vue de la page 659
Page 660 of 906 NT8D15 E&M Trunk card
553-3001-211 Standard 3.00 August 2005
Table 208
E&M trunk card – jumper strap settings
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
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 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.
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