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  2. Vertical service code - Wikipedia

    en.wikipedia.org/wiki/Vertical_service_code

    A vertical service code (VSC) is a sequence of digits and the signals star (*) and pound/hash (#) dialed on a telephone keypad or rotary dial to access certain telephone service features. [1] Some vertical service codes require dialing of a telephone number after the code sequence.

  3. Supplementary service codes - Wikipedia

    en.wikipedia.org/wiki/Supplementary_service_codes

    ETSI and 3rd Generation Partnership Project (3GPP) standards, such as GSM and LTE, define supplementary service codes that make it possible to query and set certain service parameters (e.g., call forwarding) directly from mobile devices.

  4. Call forwarding - Wikipedia

    en.wikipedia.org/wiki/Call_forwarding

    Call forwarding, or call diversion, is a telephony feature of all telephone switching systems which redirects a telephone call to another destination, which may be, for example, a mobile or another telephone number where the desired called party is available. Call forwarding was invented by Ernest J. Bonanno.

  5. Remote call forwarding - Wikipedia

    en.wikipedia.org/wiki/Remote_call_forwarding

    To activate Remote Access to Call Forwarding, a subscriber calls a provider-supplied Remote Access Directory Number, enters the telephone number of the line to be redirected along with a personal identification number (PIN), a vertical service code (such as 72# or *73) and the number to which the calls are to be forwarded.

  6. Telephone numbers in Australia - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Australia

    125xxx – Telstra mobile services (e.g. 125111 is Telstra mobile customer service) 1268x , 1268 xxxx and 1268 xxx xxx – Internal network services 127 – Testing numbers (e.g. 12722123 reads your number from a Telstra line, 12723123 reads your number for an Optus line) (length varies), dial 12722199 then hang up and the call is returned by ...

  7. Mobile network codes in ITU region 5xx (Oceania) - Wikipedia

    en.wikipedia.org/wiki/Mobile_network_codes_in...

    This list contains the mobile country codes and mobile network codes for networks with country codes between 500 and 599, inclusively – a region that covers Oceania, Maritime South East Asia, and Thailand. Guam and the Northern Mariana Islands as parts of the United States are listed under Mobile Network Codes in ITU region 3xx (North America).

  8. GSM - Wikipedia

    en.wikipedia.org/wiki/GSM

    Thomas Haug (first GSM president) and Philippe Dupuis (second GSM president) during a GSM meeting in Belgium, April 1992. In 1983, work began to develop a European standard for digital cellular voice telecommunications when the European Conference of Postal and Telecommunications Administrations (CEPT) set up the Groupe Spécial Mobile (GSM) committee and later provided a permanent technical ...

  9. Telephone numbers in Oceania - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Oceania

    Country Code: +61 International Call Prefix: 0011 Trunk Prefix: 0. Telephone numbers in Australia consist of a single-digit area code (prefixed with a '0' when dialing within Australia) and eight-digit local numbers, the first four, five or six of which specify the exchange, and the remaining four, three or two a line at that exchange.