DCS Explained CTCSS/DCS Technical Overview For the current ETSI Standard TS 103 236 Continuous Tone Controlled Signalling System (CTCSS) and Digitally Coded Squelch Signalling (DCSS) document click on the Standards tab on this page.
Scott Halleran/Getty. One of the more perplexing storylines of the current NBA season is the growing number of professional basketball players claiming to believe that the earth is flat. Among the flat-Earth truthers are Kyrie Irving, Wilson Chandler, and â most recently â Shaquille O'Neal. Actually, scratch that last one.
One of the first western models of the Earth that wasn't flat was that of the greek thinker Anaximander (610 B.C. - 546 B.C.). He thought the Earth was a cylinder. However Ancient Greeks knew the earth was round as early as the 6th century B.C.