Logic Mappings - Polycom EF2201 Application Note

Logic mappings

In addition to creating the macros for many common functions, InstantDesigner
also creates logic input pin mappings that can execute these macros through
simple contact closures, such as the contacts from push-to-talk microphones or
toggle and push button switches that are wired to the logic ports on the devices.
In our example, the logic mappings are shown in Figure 21. Each microphone
input has an associated pin on the Vortex logic input port on the rear panel. In this
example, the table microphone 1 mute contact closure is wired to pin 1 with the
ground pin of the push-to-talk microphone connected to pin 25 of the logic input
connector. In this example, when input 1 is shorted to ground (pin 25), Macro 3
will be executed –unmuting the microphones. When input 1 is opened, Macro 2
will be executed – muting the microphones.
While muting microphones with push-to-talk microphones is important, knowing
the status of whether the microphones are muted is even more important.
InstantDesigner takes care of this for the A/V specialist by creating default logic
output status mappings that can be used to drive the LED on the microphone so
that the LED is "on" when the microphone is active (unmuted) and the LED is "off"
when the microphone is inactive (muted). The default mappings are shown in
Figure 22. Notice there are additional logic output mappings that can be used to
show the gating status of a microphone – if the microphone is gated "on", the LED
could be turned on for that microphone.
For more information on how to wire push-to-talk microphones to the Vortex, open
the help file within Conference Composer and review the Application Notes section
for a detailed explanation.
28