• A digital transmission standard, system, or line with a signaling rate of 1.544 Mbps, which is equivalent to DS1, providing a capacity of 24 voice channels, each with 64 Kbps. Such channels may be combined, and can serve to transmit voice and/or data. T1 is used mostly in the Unites States, Canada, and Japan, and is similar to E1, which is used by most other countries. E1 has a signaling rate of 2.048 Mbps. Also called T-span (2).
  • acronym for T-Span
  • A unit of 24 voice channels, which is the equivalent of a T1 line or circuit.

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