GAI-Tronics XAAB002A Audio Accessory Box - Manual (Page 15)

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Operation
Functional Description
The GAI-Tronics Model XAAB002A Audio Accessory Box is an appliance for consolidating various audio
input/output devices associated with two-way dispatch radio service. Audio paths through the device are
enabled as needed depending on the device being used at any given time, and are configured for the optimal
signal levels associated with currently available microphones, headsets and handsets.
Several operating parameters vary the signal levels and logical behavior of the various devices. They are
selectable with programming switches.
After initial installation of the Audio Accessory Box, no user interface is required. For information on the
operation of the various accessories, refer to the associated user manuals.
Functions
Push-to-Talk (PTT - Radio Key-up)
Push-to-talk can be initiated from the paddle on the desk mic, the TRANSMIT bar on the desk set, handset
PTT bar, the footswitch, or a PTT button associated with a headset. PTT is sensed individually at each
mic connector, and this action routes the transmit audio through the path associated with that type of mic.
See Table 12. Jumper Settings on page 15 in the Description section.
Monitor
Monitor is operated from the same sources as above. This function is used primarily in analog radio where
two or more radio systems share a common channel frequency. The monitor pedal on the footswitch can
also be used to momentarily mute audio coming from the telephone party. See Programming Settings in the
Installation section.
Mute
The optional mute switch on the front panel momentarily mutes radio receive audio to the headset.