| 释义 |
direct distance dialing
direct distance dialing n (Telecommunications) US and Canadian a service by which telephone subscribers can obtain long-distance calls by dialling direct without the aid of an operator. British equivalent: subscriber trunk dialling direct distance dialing
direct distance dialing[də¦rekt ¦dis·təns ′dīl·iŋ] (communications) A telephone exchange service that allows a telephone user to dial subscribers outside the local area using a standard routing pattern from the local or end office. AcronymsSeedrop dead date |