Polycom MX392 - Manual (Page 41)

Now, right click in the H ELD C OMMAND column for Logic Input 1 and select I NSERT , M ACRO , 0 "(MUTE
ON"). Now, as long as the switch is held down, the Vortex Device will execute Macro 0.
Repeat the process for each microphone that is connected to the Logic Input port. If you are
successful, you should see this on the screen (the screenshot is from a Vortex EF2241):
Make sure that the physical wiring works by pressing the membrane switch. You should see the
LED above the pin assignment lit in green as long as the switch is held down:
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