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Refer to the drawing below to set programming jumpers. Jumpers are shown in factory default settings.
JP3: LOCAL AUDIO LINKING
JP4: RETRN AUDIO LINKING
JP7: TB BUS
JP1: MIC OUTPUT LEVEL
JP2: TALKBACK LEVEL
JP7: MONO/STEREO MODE
TYPICAL INSTALLATIONS illustrating “one-way” and duplex Talkback