Polycom MX392 - Manual (Page 17)

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:
T
OGGLE
O
PERATION
M
UTE
A
LL
E
XAMPLE
Let's say that you have 2 Vortex units linked together via EFBus--1 EF2280 at Device ID 00 and 1
EF2241 at Device ID 01. When someone pushes the membrane switch on one microphone, you
want that action to mute all microphones as well as turn off the LED. This example explores the
process in achieving that goal.
First, set DIP Switch S1, S2, and S3 to ON and set 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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