What is T-1?

• Digital transmission facility operating at 1.544 Mbps (DS1)

• Comprised of 24 64-Kbps DS0s

  • 24 x 64 Kbps = 1.544 Mbps
  • Channelized or non-channelized

• Transmission is over 2 sets of twisted pair wires (UTP)

• Full duplex: 2-way simultaneous transmission

• Time-division Multiplexed

  • Allows the bit stream to be channelized into 24 x 64 Kbps channels

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