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  2. 1-5-7-1 - Wikipedia

    en.wikipedia.org/wiki/1-5-7-1

    1-5-7-1 is a family of calling features in the United Kingdom, for residential and business telephone lines and for mobile telephones, that are provided by BT Group and several other telephone service providers.

  3. Nortel Norstar - Wikipedia

    en.wikipedia.org/wiki/Nortel_Norstar

    The Nortel Norstar, previously the Meridian Norstar, was a small and medium-sized business digital key telephone system introduced by Nortel (formerly Northern Telecom) and later sold to Avaya. It featured automatic call distribution, and supported up to 192 extensions. In the United Kingdom it was sold by British Telecom, rebadged as the BT ...

  4. Buzby - Wikipedia

    en.wikipedia.org/wiki/Buzby

    Buzby was a yellow (later orange) talking cartoon bird, launched in 1976 as part of a marketing campaign by Post Office Telecommunications, which later became British Telecommunications (BT). [ 1 ] A group of runners from British Telecommunications with mascot Buzby at a fun run in London in the 1970s

  5. Digital Access Signalling System 2 - Wikipedia

    en.wikipedia.org/wiki/Digital_Access_Signalling...

    Digital Access Signalling System 2 (DASS2) is an obsolescent protocol defined by British Telecom (BT) for digital links to PSTN based on ISDN. Although still available on request, it has been superseded by ETS 300 102 ("EuroISDN"). DASS2 is an improved version over DASS1, based on experiences with DPNSS.

  6. VoIP phone - Wikipedia

    en.wikipedia.org/wiki/VoIP_phone

    AD and DA converters: To convert voice to digital data and vice versa; Ethernet or wireless network hardware to send and receive messages on data network; Power source - a battery or DC/AC source; some VoIP phones receive electricity from Power over Ethernet; Some VoIP phones include an RJ-11 port to connect the phone to the PSTN

  7. Landline - Wikipedia

    en.wikipedia.org/wiki/Landline

    The VoIP replacement is known as "Digital Voice" (on a BT service) in the UK. France, Germany and Japan are also in the process of replacing theirs. [20] By means of porting, voice over IP services can host landline numbers previously hosted on traditional fixed telephone networks. VoIP services can be used anywhere an internet connection is ...

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