Title: Subscriber trunk dialling - Wikipedia
Headings: Subscriber trunk dialling
Subscriber trunk dialling
Contents
Terminology
Explanation
History
Numbering plan
Calls between the UK and Ireland
From the Republic of Ireland
Calls to Ireland from the UK
See also
References
External links

Content: Subscriber trunk dialling - Wikipedia
Subscriber trunk dialling
From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: " Subscriber trunk dialling" – news · newspapers · books · scholar · JSTOR (December 2011) ( Learn how and when to remove this template message)
Subscriber trunk dialling ( STD, also known as subscriber toll dialing) is a telephone system allowing subscribers to dial trunk calls without operator assistance. The term was introduced when it first became possible for long-distance calls to be dialled directly, and is now rarely used as calls to any destination can be dialled. This article is about the STD system in the UK. Contents
1 Terminology
2 Explanation
3 History
3.1 Numbering plan
3.2 Calls between the UK and Ireland
3.2.1 From the Republic of Ireland
3.2.2 Calls to Ireland from the UK
4 See also
5 References
6 External links
Terminology
The term subscriber trunk dialling is used in the United Kingdom, the Republic of Ireland, Australia, India and South East Asia. The corresponding term in the North American Numbering Plan (the United States and Canada) is direct distance dialing . The term was extended when, from 8 March 1963, subscribers in London were able to directly dial Paris using international direct dialling .