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Chapter 5 - Design of Matrix Intercom Systems 79
Figure 5.10
Wireless Intercom Interfaced to Matrix Intercom
Since the RadioCom
™
system is full duplex, with the base station transmitting
continuously, there is no need for the matrix intercom to provide a PTT (Push To Talk)
signal to the base.
In the case of radio systems where the base station is not transmitting continuously, the
matrix must provide a logic signal corresponding to a user pushing an intercom key to talk
to that wireless system. ADAM, ADAM-CS, and Zeus all come standard with logic
signals, with open collector outputs for this purpose, and have available the UIO-256, as
an accessory, which can provide an actual relay closure, if required.