T-Carrier technologies

T-Carrier technologies: Technologies Invented to transmit multiple phone calls over a single link. Eventually, they also became common transmission systems to transfer data much faster than any dial-up connection could handle

• originally developed by AT&T in order to transmit multiple phone calls over a single link
• require dedicated lines which are more expensive

T1 = Transmission System 1, the 1st T carrier spec

• AT&T found a way to carry 24 simultaneous phone calls across a single piece of twisted pair copper
• 1.544 Mb/sec