Abstract: Communications systems containing an electrically-isolated Push-To-Talk (EI-PTT) device are described in this application. The communication systems contain multiple radios, a microphone/headset, and a centralized power supply. The systems also contain an EI-PTT device which reduces or eliminates noise that can disrupt the audio transmission. The EI-PTT device allows an operator or user of the communication system to actuate a button which remotely switches the radio from receive mode to transmit mode. This allows multiple users to listen (receive) to communication traffic on the same frequency at all times, but only speak (transmit) on the frequency while activating the EI-PTT device. Unlike other PTT devices which electrically tie the ground signals inside the device, the EI-PTT devices electrically isolate the ground signals to reduce the problem of noise coupling. Other embodiments are described.

Abstract: An interchangeable cumberbund with integrated wiring to allow for connecting a variety of electronic devices for an intended purpose or mission and exchanging a configured garment for another. The reconfigurable cumberbund allows for multiple quick-disconnect cable harnesses to be weaved into the cumberbund which enables rapid and convenient removal of hardware that incorporates all I/O to a computer. The reconfigurable cumberbund connected to a wearable tactical vest containing a mobile ultra-rugged personal computer is the essential combination that allows hands-free use by the user.