T1

• Point to point transmission => no switching
• uses two-wire pairs (1 pair to send, 1 to receive)
• full-duplex signal at 1.544 Mbps
• Used to transmit digital, voice, data and video signals
• multiplexing - signals from different source are collected into a component called a multiplexer and fed into one cable 8,000 times a second
• a T1 divides into 24  64 Kbps channels. Subscribers can lease one 64 Kbps channel known as a Fractional T-1.
• each channel can transmit at 64 Kbps. This is called a DS-0
• the whole 1.544 Mbps is known as DS-1
• Connecting a T1 line to your network is similar to a connecting a DDS or frame relay line. You will need a T1-compatible CSU/DSU, and a bridge or router. To distribute the T1’s bandwidth between voice and data traffic, you will need a multiplexer/demultiplexer to combine voice and data signals for transmission, and separate them upon reception.