has been subjected to noise, jitter, and other interference, to a clean digital pulse on the other interface of the chip. See also Central Office Multiplexing Digital Signal 0 Digital Signal 3 DS1 Encoding schemes: B8ZS, HDB3, AMI Line code Notes References Further reading All You Wanted to Know About T1 But Were Afraid to Ask Stone, Alan, "How America Got On-Line: Politics, Markets and the Revolution in Telecommunications", (Taylor & Francis, 1997), Abbate, Janet, "Inventing the Internet", (MIT Press, 1999), PC Magazine, 6 February 1996 Telecommunications standards Multiplexing he:T1