Chapter 1
Introduction
This chapter provides an overview of the PAS features and capabilities.
The Priority Audio Switch (PAS) is designed to be installed between a transmitter site and
two control operator positions so they can share a single transmitter. The PAS takes in two
4-wire audio lines each with a Push-to-Talk (PTT) lead where PTT is activated by shorting
this lead to ground. The ports are designated as Priority and Secondary. The Priority port
will seize control of the audio channel when its PTT lead is shorted to ground, otherwise the
Secondary ports audio channel and PTT state are passed through to the output port.
The PAS contains two completely isolated instances of the priority switching function.
The standard PAS is powered by 48VDC, which matches most telco systems. External
power supplies are available for AC or other DC power operations.
Receive audio and other return leads from the transmitter are always passed back to both
controllers.
Input Ports Power and Output Ports
Package Contents
You should find the following items packaged with your PAS product:
The PAS unit
Optional power supply (if ordered)
If any of the above are missing, contact your dealer immediately.
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