Wireless-Communication Headset Subsystem To Enhance Signaling

A special-purpose communications subsystem provides a push-to-talk signal to a communication system as if the individual was directly wired to the system. The subsystem also permits multiple wireless users to operate independently in the same environment. This interface operates in the 900-MHz industrial, scientific, and medical (ISM) frequency band and can be used with many different commercial off-the-shelf (COTS) wireless-communication headsets, without need to modify the headsets or the communications system in use.