- Subscriber trunk dialling
The term "subscriber trunk dialling" is used in other countries such as the
Republic of Irelandand Australia, but the corresponding term in the US and Canada is direct distance dialing.
The term was extended, when on
8 March 1963, Londonsubscribers were able to dial Parisdirect using international subscriber trunk dialling.
Indiathe term still applies and to dial out of one's unit area, the relevant city code has to be prefixed to the local number. This prefix starts with a 0. Certain numbers are also prefixed with 95 which are local calls within State limits.
The introduction in the UK of subscriber dialling of long distance calls removed the distinction that had existed between Trunk and Toll calls. This term however, is still widely prevalent in
Indiato describe any national call made other than one's local unit. A "subscriber" is someone who subscribes to, i.e. rents, a telephone line and a "trunk call" is one made over a trunk line, i.e. a telephone line connecting two exchanges a long distance apart. Now that all calls may be dialled direct, the term has fallen into disuse.
In the UK, STD started when, on
5 December 1958, the Queen, who was in Bristol, dialled a phone call to Edinburgh, the furthest distance a call could be directly dialled at the time cite web
title=Events in Telecommunications History: 1958, 'BT's history', btplc.com/
accessdate=2008-08-12 ] .However, it was not until
title=Events in Telecommunications History: 1979, 'BT's history', btplc.com/
accessdate=2008-08-12 ] that the STD system was completed, though most of the country was covered well before then. The system required that each area have its own STD code which could be dialled by subscribers, and although they are now officially called area codes, it is still common to see and hear the old term in everyday use.
UK telephone numbering plan
List of country calling codes
* [http://www.btplc.com/thegroup/BTsHistory/Eventsintelecommunicationshistory/Eventsintelecommunicationshistory.htm The archives of BT including archives of its predecessor organizations] : A good source of information relating to the history of the telephone system in the UK.
* [http://news.bbc.co.uk/onthisday/hi/dates/stories/may/21/newsid_2510000/2510289.stm Archive news article from the BBC on the introduction of Subscriber Trunk Dialling.]
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Look at other dictionaries:
subscriber trunk dialling — ➔ STD … Financial and business terms
subscriber trunk dialling — ► NOUN Brit. ▪ the automatic connection of trunk calls by dialling without the assistance of an operator … English terms dictionary
subscriber trunk dialling — noun A dialling system in which subscribers in exchanges in many countries of the world can dial each other directly (abbrev STD) • • • Main Entry: ↑subscribe … Useful english dictionary
subscriber trunk dialling — noun Brit. the automatic connection of trunk calls by dialling without the assistance of an operator … English new terms dictionary
subscriber trunk dialling — noun a system for making long distance calls in which the subscriber dials the required number direct, rather than going through an operator. Abbrev.: STD … Australian English dictionary
Trunk 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… … Wikipedia
Trunk prefix — A trunk prefix is the number to be dialed in a domestic telephone call, preceding any necessary area codes and subscriber numbers. When calling overseas numbers, the trunk prefix is omitted by the caller. In most countries, such as Australia,… … Wikipedia
subscriber — n. 1 a person who subscribes. 2 a person paying for the hire of a telephone line. Phrases and idioms: subscriber trunk dialling Brit. the automatic connection of trunk calls by dialling without the assistance of an operator … Useful english dictionary
Former Australian dialling codes — Introduction of Area Codes (pre 1990s)= The introduction of subscriber trunk dialling was slow, partly because of the distances of exchanges in some areas and partly due to the use of manual exchanges well into the 1980s. Initially, area codes… … Wikipedia
List of dialling codes in the United Kingdom — This is a list of telephone dialling codes in the United Kingdom. It is based on Ofcom s area code list, but includes defunct codes and historical changes, including the derivation of the two letter identities where known. Note that… … Wikipedia