Homemade Intercom System

0909-095344 Markus The main unit has four buttons. In order these are on/off, remote call disable, push to talk, and remote station select. The remote unit has two buttons. In order these are the call button and the privacy button (which disables the audio and the indicator lamp). Only one of these fancy remotes is supported; the other is just a plain loudspeaker with no call button or indicator lamp feature. Link.

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