18
T3 FIBER OPTIC LINE DRIVER
Table 3-1. Main board jumper settings.
Jumper
Description
Values
Factory Setting
JP2
Controls the AIS
On—AIS is transmitted.
On
transmission to the
Off—AIS is not
electrical or optical
transmitted.
interface when a
minor alarm is
detected.
Setting the T3 interface board jumpers
The line driver’s T3 interface board features jumpers (JP1–JP3) that are used for
selecting the T3 cable length. See Figure 3-2 and Table 3-2.
Figure 3-2. T3 interface board layout.
Table 3-2. Selecting the T3 interface cable.
T3 Cable Length
Jumper Positions
JP1
JP2
JP3
Up to 225 ft.
Pins 2, 3*Pins 1, 2*Pins 2, 3*
226 ft. to 450 ft.
Pins 1, 2
Pins 1, 2
Pins 1, 2
More than 450 ft.
Pins 1, 2
Pins 2, 3
Pins 1, 2
*Factory settings.
