Patent ID: 7813696

Claim:
A Bluetooth remote PTT (Push-To-Talk) and handsfree communication system using a PTT type handset transceiver or a CDMA terminal, the communication system comprising: a dongle, connected to the handset transceiver or the CDMA terminal, for toggling a transmission mode and a reception mode in accordance with a key signal transmitted from a PTT key device, the dongle transmitting an audio signal outputted from the handset transceiver to a headset in the reception mode, and receiving a voice signal transmitted from the headset in the transmission mode to output the received voice signal to the handset transceiver; the headset for receiving and outputting the audio signal transmitted from the dongle, receiving an input of user's voice, and transmitting the user's voice signal to the dongle; and the PTT key device for transmitting the key signal for toggling the transmission/reception mode according to a user's manipulation to the dongle; wherein the dongle, the headset, and the PTT key device perform short-range wireless communications using Bluetooth, wherein the dongle comprises: a Bluetooth antenna for performing short-range wireless communications with the headset and the PTT key device; a dongle communication unit for searching for the headset and the PTT key device, performing Bluetooth communications with the searched headset using a headset profile (HSP), and performing Bluetooth communications with the searched PTT key device using a serial port profile (SPP); and a dongle control unit for judging whether the key signal transmitted from the PTT key device is received, and if a press key signal is inputted, setting the transmission mode to turn on a PTT function of the handset transceiver, and receiving the voice signal transmitted from the headset to output the received voice signal to the handset transceiver, the dongle control unit judging whether a ring tone outputted from the handset transceiver is inputted, and if the ring tone is inputted, setting the reception mode and transmitting the audio signal outputted from the handset transceiver to the headset.