Patent ID: 6970727
Filing Date: 2005-11-29
Classification: H04B

Abstract:
1. A hands-free device for hands-free communications with a cellular telephone/two-way radio and for instructing the cellular telephone/two-way radio to transmit in a half duplex communications mode for a two-way radio conversation, and for instructing the cellular telephone/two-way radio to establish communications for a full duplex cellular telephone conversation, the hands-free device comprising: a plug assembly, the plug assembly having a plug and a plug assembly circuit board, the plug having a VCC pin, a ground pin, a transmit pin, a receive pin, and a PTT pin, the plug assembly circuit board having a transmit connection area coupled to the transmit pin, a receive connection area coupled to the receive pin, an analog ground connection area coupled to the ground pin, a PTT connection area coupled to the PTT pin, and a PTT ground connection area coupled to the ground pin; a switch assembly, the switch assembly comprising: a microphone assembly comprising: an earpiece having a first connector and a second connector; and a single cable, the single cable comprising a base section and an extension section, the base section comprising: the extension section of the single cable comprising: