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  2. 1-5-7-1 - Wikipedia

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

    In 2001, BT Group launched its Answer 1571 service as a free service, available at no extra cost to its existing telephone line customers. In 2007 a charge of £1 was introduced for any month in which two chargeable calls are not made on the line (this might apply, for instance, to people who have Carrier preselect with another telephone ...

  3. Plant test number - Wikipedia

    en.wikipedia.org/wiki/Plant_test_number

    In telecommunications, a plant test number is a telephone number reserved for use by telephone installers or other workers to test an individual telephone line. Test numbers are typically unlisted. The North American Numbering Plan (NANP) reserves the exchange (central office) prefixes 958 and 959 for plant testing. [1]

  4. Telephone numbers in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_the...

    The number range 08085 xxx xxx was made available to owners of 0500 xxx xxx to enable a smooth transition. ... Many fixed-line telephone subscribers, e.g. of BT, [57 ...

  5. AOL Help

    help.aol.com

    Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.

  6. Line hunting - Wikipedia

    en.wikipedia.org/wiki/Line_hunting

    Multiline hunting (sometimes MLH, line hunting or MHG, multiline hunting group) is a feature that allows multiple telephone lines going into a business to act as a single group, called a hunt group. This type of fallback is a somewhat more complex form of call forwarding. If the line called is busy, the call goes to the next available line.

  7. Mercury Communications - Wikipedia

    en.wikipedia.org/wiki/Mercury_Communications

    Mercury began by offering fixed-line facilities direct to business and residential customers. Callers could use the 'Mercury 2300' service via their existing BT phone line by dialling a '131' prefix followed by a ten-digit customer code, then the number they wished to dial. Some phones were manufactured with a 'Mercury button' which allowed the ...

  8. Digital access carrier system - Wikipedia

    en.wikipedia.org/wiki/Digital_Access_Carrier_System

    DSL broadband internet connections cannot work on a DACS line as they rely on a copper pair running all the way to the telephone exchange. Since BT's traditional telephone line service is contractually only required to support voice and fax communication, BT are not obliged to remove a DACS because of problems with 56 kbit/s modems.

  9. Last-call return - Wikipedia

    en.wikipedia.org/wiki/Last-call_return

    Last-call return, automatic recall, or (on PBX and centrex service) camp-on, is a telecommunication feature offered by telephony service providers to subscribers to provide the subscriber with the telephone number, and sometimes the time, of the last caller.