trunk dialing
1subscriber trunk dialing — A non American term for direct distance dialing …
2Trunk vs Toll — In the US, under the purview of the Bell System, local telephone calls were free except in a few big cities, and the term toll was adopted for long distance calls because they were subject to a toll.In the UK all calls were chargeable and the… …
3Direct distance dialing — (DDD) or direct dial is a telecommunications term for a network provided service feature in which a call originator may, without operator assistance, call any other user outside the local calling area. DDD requires more digits in the number… …
4toll connecting trunk — Trunk utilized to link a local central office (Class 5) to the direct distance dialing network …
5Direct inward dialing — (DID), also called direct dial in (DDI) in Europe and Oceania, is a feature offered by telephone companies for use with their customers private branch exchange (PBX) systems. In DID service the telephone company provides one or more trunk lines… …
6Seven-digit dialing — 7 digit dialing is a popular term referring to the traditional convention in the United States and Canada for dialing local phone calls. It is also sometimes known as local format or network format .Within the multi national calling area… …
7Ten-digit dialing — In the United States and Canada, 10 digit dialing is a popular term used to refer to the practice of including the area code of a phone number when dialing. Sometimes (see below), an initial 1 is used; such dialing is known as 11 digit dialing or …
8Subscriber trunk dialling — (STD, also known as subscriber toll dialling) is a term for the UK telephone system allowing subscribers to dial trunk calls without operator assistance. Terminology The term subscriber trunk dialling is used in other countries such as the… …
9Direct Inward Dialing — (DID), also called Direct Dial In (DDI) in Europe, is a feature offered by telephone companies for use with their customers PBX systems, whereby the telephone company (telco) allocates a range of numbers all connected to their customer s PBX. As… …
10through dialing — The attendant can select an outgoing trunk and connect the extension to the trunk to allow the call to be completed by the extension …
