9
JUMPER SETTINGS
The following table shows the default jumper settings and their function:
Jumper
Number
Default Position
Description
JP101
Out
Install during TX Notch Filter Alignment only
JP201
Out
Sidetone for dialing (4-wire option only)
JP202
In
Removed when TRC Option E is installed (Line 2/Supervisor)
JP203
In
Removed when TRC Option E is installed (Line 2/Supervisor)
JP204
1-2 In – 3-4 Out
2-wire (1-2 In 3-4 Out) or 4-wire option (1-2 Out 3-4 In)
JP205
1-2 In – 2-3 Out
Balanced (1-2 In 2-3 Out)/Unbalanced (1-2 Out 2-3 In) Audio
Selection for use with a telemetry radio instead of a dedicated line.
JP206
Out
Power with current limit.
JP207
Out
Activates Q205 to provide 14 V to external M lead relay.
JP208
Out
If JP208 1-2 is installed with JP210 1-2, provides an open-collector
to ground on PL1-3 to PTT a telemetry radio or ground a relay for
an M lead.
JP209
In
Always installed unless directed otherwise by Midian.
JP210
1-2 Out – 2-3 Out
Install JP210 1-2 with JP208 1-2 to PTT a telemetry radio.
JP301
1-2 In – 2-3 Out
Future Use
JP302
Out
Handset Audio Feedback. Install only with the TRC Option C if dial
tones and voice in the ear piece are desired.
JP303
Out
TX Audio Loading. If less TX audio is needed, install this jumper.
JP304
In
2-Wire RX Audio Termination. If more RX audio is needed, remove
this jumper. This should only be needed if paralleling remotes.
JP305
Out
4-wire option only. RX Audio Loading. If less RX audio is needed,
install this jumper.
JP306
Out
4-wire option only. RX Audio Termination. If more RX audio is
needed, remove this jumper. This should only be needed if
paralleling remotes.
JP307
1-2 Out – 2-3 In
With 2-3 installed the volume control switch is the main source of
controlling the handset ear piece audio level. With 1-2 installed and
2-3 removed, the volume control switch does not affect the handset
ear piece audio level and RP304 is the only source of control.
JP308
Out
Low impedance audio for external speaker or PA System.
JP309
In
Leave In: In for hard mute and out for soft mute
JP401
Out
Factory Use Only
JP409
Out
Factory Use Only
