Polycom MX392 - Manual (Page 4)

Switch Behavior User Action Required / LED
Behavior DIP Switch Settings
Push to Mute, Release to Talk (As
Shipped) Press and hold switch to temporarily
mute microphone; release switch to
unmute.
LED on when microphone is active.
S1 = OFF
S2 = OFF
S3 = OFF
S4 = OFF
Push to Talk, Release to Mute Press and hold switch to activate
microphone; release switch to mute.
LED on when microphone is active.
S1 = OFF
S2 = ON
S3 = OFF
S4 = ON
Toggle: Push On/Push Off Press switch to toggle microphone on
and off.
LED on when microphone is active.
S1 = ON
S2 = ON for muted initial state
S2 = OFF for active initial state
S3 = OFF
S4 = OFF
Microphone Always Active
(switch available for logic
functions only) LED always off.
If LED IN is shorted to LOGIC
GROUND terminal, LED always on.
S1 = OFF
S2 = OFF
S3 = ON
S4 = OFF
Automatic Mixer Mode (MX392
Models only) If S1 = OFF, SWITCH OUT will be
momentarily logic low when switch is
pressed.
If S1 = ON, SWITCH OUT will be
latching low when switch is pressed.
Connect SWITCH OUT signal to Logic
Input port (Pins 1-24).
Connect LED IN to Logic Output port
to have EF Device control the action
of the LED.
S1 = ON or OFF
S2 = OFF
S3 = ON
S4 = OFF
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