JK Audio Interchange - Manual (Page 6)

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Interchange™ Intercom Phone Bridge
Getting to Know Your Interchange
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1. Talk Control
The position of the three position toggle switch determines when
Interchange will send audio into the Party Line intercom.
Up = Talk: Interchange sends and receives audio (simultaneously). Use this
position with the headset interface, or as a general purpose 4-wire interface.
Center = Off: Interchange functions as a listen-only device. No audio will be
sent into the Party Line intercom.
Down = Auto: Talk function follows the hook state of the innkeeper Phone
Hybrid.
2. Intercom Channel
Up = Audio on Intercom Channel 1/A (Pin 2)
Down = Audio on Intercom Channel 2/B (Pin 3)
3. Talk LED
Indicates audio transmission into the Party Line intercom.
4. Power LED
Indicates intercom power detected.
5. COM Level LEDs
Indicates audio signal power on/from the Intercom channel. The 0dB LED
corresponds to a nominal level of -10 dBu on the intercom channel.
Controls & Indicators