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Appendix C: Glossary and Acronyms
TDM Time Division Multiplexer
A device that supports simultaneous transmission of multiple data streams
into a single high-speed data stream. TDM combines signals by
interleaving bits one after the other.
TE Terminal Equipment
A device that is established as a point of termination of a communications
circuit or channel. Terminal equipment comprises all customer premises
equipment (CPE). TE devices are connected to NT devices.
telco
A generic name which refers to the telephone companies throughout the
world, including RBOCs, LECs, and PTTs.
tip and ring
The standard termination on the two conductors of a telephone circuit;
named after the physical appearance of the contact areas on the jack plug.
twisted pair
Two copper wires commonly used for telephony and data
communications. The wires are wrapped loosely around each other to
minimize radio frequency interference or interference from other pairs in
the same bundle.
USB Universal Serial Bus
Industry standard defining communication protocols, cables, and
connectors used in a bus for connection, communication, and power
between electronic devices and computers.
Digium, Inc. Page 99