Phones Archive

Some telephone documents on the web

British Subscriber Trunk Dialling Codes a list found on the sigtel.com website shortly before it died in 2005. Includes notes on the derivations of the codes.
The Oftel Numbering Conventions - April 1997. The Wayback Machine has a number of versions of this document but the only substantive change was OFTEL changed to Oftel throughout!
Points of interest for me in this document are:
- B1.5 'Operators are expected to' support clot's level.
- B3.2 'A map of the UK showing the areas and codes used will [my emphasis] be made available to licensed operators by Oftel'.
The Oftel Numbering Conventions - Issue 4 - 1 March 2002. The Wayback Machine also has a number of versions of this document but I have only looked at one version.
My points of interest are still there under new section numbers:
- A2.7 'Operators are expected to' support clot's level. The wording has been improved.
- A3.5 'Oftel will advise on the procedure for licensed operators on how to obtain a map of the United Kingdom showing the areas and codes used'. ['on how' is redundant.] A suspicious move further away from actually supplying it!
Ofcom took over the functions of Oftel but the document cannot be found on the Ofcom site. At least not on their Numbering page.
Full automation of the telephone system the White Paper which introduced Charge Groups and STD. (The phone system was run by a Government department at that time.) Essential reading. Uses pre-decimal system (£sd) prices.
A User's Guide to Telephone Numbering from Ofcom. Sections 1.16 and 1.17 are a careful description (with four figs) of Charge Groups. Curious in that it was written after 1995 (the document reflects the PhONEday changes) at a time when Charge Groups were already dying.
The obituary notice for Charge Groups in item 1) of the ReadMe file of 5th April 2004 for the National Telephone Numbering Plan.
Not sure why I kept this but I think it was meant as another obituary item: Link checker report starting from www.kcom.com/eastyorkshire/pricemanual, ie. the price list for Hull and district telephone services.

Back to Phones Index

Roger W. Haworth 2005 Jan 18 updated 2016 Mar 09
php file date: 2022 Sep 30 08:09:43