Black Box 34336 Manual De Usuario
146
Modem 34336
Table D-1. Jumper Switch Functions.
JUMPER(S)
Pins 1 and 2 connected
Pins 2 and 3 connected
JP1
Frame and signal
Frame and signal
ground connected
ground not connected
JP2
-12/-24/-48 VDC operation
JP3, JP4
-12/-24/-48 VDC operation
(Set to same
position)
position)
JP5, JP6
A/A1 control
MI/MIC control
(Set to same
position)
position)
JP7
Pin 25 used for analog
Pin 25 used as test
loopback (input)
mode indicator (output)
JP8
For factory use only. Do not change JP8 setting!
Factory settings are shown in bold face.
For each jumper, pin 1 is identified by a “1” printed on modem circuit board.
(The JP2 pin 1 label may be difficult to read; JP2 pin 1 is the pin closest to
the edge connector.)
(The JP2 pin 1 label may be difficult to read; JP2 pin 1 is the pin closest to
the edge connector.)