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  2. Vertical service code - Wikipedia

    en.wikipedia.org/wiki/Vertical_service_code

    Calling number delivery blocking 1831 #31# [4] [5] 141 #31# [6] *68 1168 Activate call forwarding on busy ... Short code – Short telephone numbers for voice, text ...

  3. Mobile telephone numbering in India - Wikipedia

    en.wikipedia.org/wiki/Mobile_telephone_numbering...

    In India, mobile numbers (including pagers) on GSM, WCDMA, LTE and NR networks start with either 9, 8, 7 or 6.Each telecom circle is allowed to have multiple private operators; previously it was two private + BSNL/MTNL, subsequently it changed to three private + BSNL/MTNL in GSM; however currently each telecom circle has all four operators including Reliance Jio, Bharti Airtel, Vodafone idea ...

  4. BSNL - Wikipedia

    en.wikipedia.org/wiki/BSNL

    [17] [18] The telecom minister said that BSNL will launch its 4G services all over India on the 75th Independence Day of India along with various other projects. [19] BSNL is using 700 MHz and 2100 MHz bands to roll out the 4G services which can be upgraded to 5G in the future. BSNL has installed more than 40,000 plus 4G enabled and 5G ready ...

  5. Telephone numbers in India - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_India

    The same prefix of the number zero + the area code is required to dial any fixed-line number in India from a mobile phone, irrespective of the area code. For example, to dial a landline number in Indore, one would have to dial from a landline in Indore: the phone number; from a landline in Mumbai: 0731 and then the phone number

  6. Voice short codes - Wikipedia

    en.wikipedia.org/wiki/Voice_short_codes

    The idea is for mobile callers to use the cheaper shortcode number and landline callers to use the 09 number. Following their success in TV voting on shows like BBC's The Voice UK, [3] voice short codes are now being used as an alternative to non-geographic numbers. Voice short codes enable businesses to provide greater transparency on call ...

  7. BSNL Mobile - Wikipedia

    en.wikipedia.org/wiki/BSNL_Mobile

    Bharat Sanchar Nigam Limited (BSNL) was incorporated on 15 September 2000. It took over the business of providing telecom services and network management from the erstwhile Central Government Departments of Telecom Services (DTS) and Telecom Operations (DTO), with effect from 1 October 2000 on a going concern basis, in early days it was known as CellOne for GSM mobile services, Excel for ...

  8. Voice over LTE - Wikipedia

    en.wikipedia.org/wiki/Voice_over_LTE

    Voice over Long-Term Evolution (acronym VoLTE) is an LTE high-speed wireless communication standard for voice calls and SMS using mobile phones and data terminals. [ 1 ] [ 2 ] VoLTE has up to three times more voice [ 3 ] and data capacity than older 3G UMTS and up to six times more than 2G GSM .

  9. SIP trunking - Wikipedia

    en.wikipedia.org/wiki/SIP_trunking

    SIP trunking is a voice over Internet Protocol (VoIP) technology and streaming media service based on the Session Initiation Protocol (SIP) by which Internet telephony service providers (ITSPs) deliver telephone services and unified communications to customers equipped with SIP-based private branch exchange (IP-PBX) and unified communications facilities. [1]