(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).
The race breakdown of the population in Lamar varies per year, but currently 1,009 are one race and 6 are two or more races. Of the 1,015 people who live in Lamar, there are 273 under 20 years old. The sex breakdown of the 20 years old and younger population in Lamar is 152 male and 121 female.