Telecom Dictionary - Definitions of terms

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T-3 Definition and Use

T-3 - A leased line connection that can carry 44,736,000 bits per second. The T-3 carrier is a digital transmission that consists of 672 individual channels, each of which supports 64 Kbps using pulse code modulation (PCM) signals with time-division multiplexing (TDM). T-3 lines were originally designed to transmit digitized voice signals. Current applications also include digital data transmission. T3 lines originally used copper wire but now also include optical and wireless media. A T-3 Outstate System has been developed for longer distances between cities.

Internet access providers are sometimes connected to the Internet as a point-of-presence (POP) on a T3 line owned by a major telephone network. Some businesses also use T3 lines to connect to an Internet access provider.

See T-carrier. Also T3 Line.