(February 2013). Push-to-talk (PTT), also known as Press-to-Transmit, is a method of having conversations or talking on half-duplex communication lines, including two-way radio, using a momentary button to switch from voice reception mode to transmit mode. CB radio with push-to-talk microphone switch.
Lamar is a town in Darlington County, South Carolina, United States. The population was 1,015 at the 2000 census. It is part of the Florence Metropolitan Statistical Area. Lamar is located at 34Â°10â²13â³N 80Â°3â²45â³W / 34.17028Â°N 80.0625Â°W / 34.17028; -80.0625 (34.170388, -80.062526).
Gaston is a town in Lexington County, South Carolina, United States. The population was 1,645 at the 2010 census. It is part of the Columbia, South Carolina Metropolitan Statistical Area. Gaston is located at 33Â°48â²57â³N 81Â°6â²3â³W / 33.81583Â°N 81.10083Â°W / 33.81583; -81.10083 (33.815927, -81.100937). According to the United States Census Bureau, the town has a total area of 3.4 square miles (8.9 kmÂ²), all of it land.