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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AT&T 75 manual Uniform Dial Plan UDP, Voice Terminal, Wide Area Telecommunications Service Wats, 11-7