direct outward dialing

direct outward dialing

[də¦rekt ¦au̇t·wərd ′dīl·iŋ]
(communications)
A private automatic branch telephone exchange that permits all local stations to dial outside numbers. Abbreviated DOD.
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These gateways communicate with legacy Class 5 telephony switches and allow carriers to provide, and end users to enjoy, the same voice services they have today -- including Plain Old Telephone Service (POTS), Centrex, direct inward dialing, direct outward dialing, voice mail, E-911 and 411, call waiting, speed dialing, and other popular CLASS features.
SuperTrunk lets PBX users make more calls with fewer trunks by combing Direct Inward Dialing (DID) and Direct Outward Dialing (DOD) in the same trunk, along with DID Number Blocks, increasing trunk utilization.

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