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CHAPTER 11. GLOSSARY
Uniform Dial Plan (UDP)
A feature that allows a unique 4- or 5-digit extension number for each terminal in a
Distributed Communications System (DCS) or Main/Satellite/Tributary configuration.
Voice Terminal
A single-line or multi-appearance voice instrument (telephone).
Wide Area Telecommunications Service (WATS)
A service that allows calls to a certain area or areas for a flat-rate charge based on
expected usage.
800 Service
A service that allows incoming calls from a certain area or areas to an assigned
number for a flat-rate charge based on usage.
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