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"Regular Expressions for Validating and Formatting GB Telephone Numbers". aa-asterisk.org.uk. Archived from the original on 6 April 2014 – patterns for checking which area codes and prefixes are valid and patterns for formatting each number type, archived in 2014 "The first 25 years of UK STD code changes summarised" (PDF). Sam Hallas.
As demand for telephones grew, more telephone numbers were required. This would often see an exchange with existing three-digit numbers open one or more new ranges with four-digit local numbers (e.g. 5000-6999), and exchanges with existing four-digit numbers open one or more new ranges with five-digit local numbers (e.g. 60000–69999).
A standard United Kingdom fixed telephone number (i.e. a landline, or geographical number, as opposed to a mobile telephone number or special rate non-geographic fixed line) is divided into three parts, the trunk prefix code (0 in the UK), an STD code (area code) followed by a local number. The STD (Subscriber Trunk Dialling) code indicates the ...
The 0800 range can have NSN length as 10, 9, or 7 digits. The 0845 range can have NSN length as 10 or 7 digits. The 0500 range had NSN length as 9 digits only, and was withdrawn from use on 3 June 2017. All other UK numbers have NSN length of 10 digits. There are no telephone numbers in the UK with an NSN length of 8 digits.
Autovon keypads were one of the few production units to include all 16 DTMF signals. The red keys in the fourth column produce the A, B, C, and D DTMF events. Before the development of DTMF, telephone numbers were dialed by users with a loop-disconnect (LD) signaling, more commonly known as pulse dialing (dial pulse, DP) in the United States.
With PhONEday in 1995 and the Big Number Change, the UK had achieved huge spare capacity for new services and simple to understand prefix groupings: 01 and 02 for geographic numbers, 070 for personal numbers, 076 for pagers, 07624, 077, 078 and 079 for mobiles, 0500 and 080 for freephone, 084 and 087 for non-geographic and 090 for premium rate ...
Of those 26 price points, some 15 price points were available only for use by services on numbers starting 09, and eleven price points were withdrawn from use. [36] From 1 May 2019, new price points started to be introduced. These re-used some of the previously withdrawn SC code numbers - all as noted in the table below.
ringer equivalency number SMS: Short Message Service (i.e. text messages) SF: Single Frequency supervision tone : US SIP: Session Initiation Protocol: US SP Lock: Unlocking: UK SS7: Signaling System 7 STD: Subscriber trunk dialling: UK and India T-CXR: T-carrier (e.g. T-1) US TAPI: Telephony Application Programming Interface TR: Tip and ring ...
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