Polycom MX392 - Manual (Page 30)

When the membrane switch is pushed again, the EF Device toggles the state from unmuted to
muted. Now, the LED should not be illuminated since the input from the MX392 is now muted.
Both LED's (Conference Composer and MX392) should not be illuminated:
M
OMENTARY
O
PERATION
(P
USH TO
M
UTE
)
Let's say that you want MX392 to be unmuted by default. If someone pushes the membrane
switch, you want the microphone to stay muted while the user continues to hold the switch down.
You also want the LED to illuminate when the microphone is unmuted and not illuminate when the
microphone is muted.
First, set DIP Switch S2, and S3 to ON and set S1 and S4 to OFF. Then, connect SWTICH OUT to
one of the Logic Input pins 1-24. Connect LOGIC GND to Logic Output pins 21-25. Connect LED IN
to one of the Logic Output pins 1-20.
D
EFAULT
C
ONDITIONS
First, you want to make sure that the Vortex Device has all microphones unmuted as part of the
Power on Preset. Next, you need to make sure that if the unit is controlled by a control system that
the proper commands are sent to the Vortex Device to unmute the microphones when the room is
used for conferencing or sound reinforcement purposes. Remember that since the requirement is
push to mute, the user of the microphone is the one that must initiate the activity of muting the
microphone.
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