What is Dual Tone Multi Frequency (DTMF)?

Answer When you press the buttons on a touchtone phone, you're hearing DTMF.Each noise you hear is actually two distinct tones which represent a single number.If you press 1 then 2 then 3, you should hear... Read More »

Top Q&A For: What is Dual Tone Multi Frequency (DTMF)

What does CCTV stand for and how does it work?

Closed Circuit Television (CCTV) is the use of video cameras to transmit signal to a specific, limited set of monitors. It differs from broadcast television in that the signal is not openly transmi... Read More »

What does GED stand for?

GED stands for "General Education Development," a certificate considered equivalent to a high school diploma. In order to receive their certificate, GED recipients successfully passed tests that me... Read More »

What does EA stand for?

EA stands for Electronic Arts, which is one of the leading software manufacturers in the world. EA develops games for video game systems, computers and the Internet. The company was founded in 198... Read More »

What does CRT and LCD stand for?

According to the U.S. Department of Energy's Energy Star website, LCD stands for liquid crystal display. CRT is short for cathode ray tube. Both technologies are used in electronics, such as televi... Read More »