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  2. Comparison of VoIP software - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_VoIP_software

    This is a comparison of voice over IP (VoIP) software used to conduct telephone-like voice conversations across Internet Protocol (IP) based networks. For residential markets, voice over IP phone service is often cheaper than traditional public switched telephone network (PSTN) service and can remove geographic restrictions to telephone numbers, e.g., have a PSTN phone number in a New York ...

  3. Business telephone system - Wikipedia

    en.wikipedia.org/wiki/Business_telephone_system

    A business telephone system is a telephone system typically used in business environments, encompassing the range of technology from the key telephone system ( KTS) to the private branch exchange ( PBX ). A business telephone system differs from an installation of several telephones with multiple central office (CO) lines in that the CO lines ...

  4. Telephone exchange - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange

    A telephone exchange, also known as a telephone switch or central office, is a crucial component in the public switched telephone network (PSTN) or large enterprise telecommunications systems. It facilitates the interconnection of telephone subscriber lines or digital system virtual circuits, enabling telephone calls between subscribers.

  5. List of mobile virtual network operators in the United States

    en.wikipedia.org/wiki/List_of_mobile_virtual...

    Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the three major cellular carriers in the country, AT&T Mobility, T-Mobile US, and Verizon. [1] [2] In 2016, MVNOs across the nation such as Metro PCS, Boost Mobile, Cricket Wireless, and TracFone brands served about 36 million subscribers.

  6. How to Do a Free Reverse Phone Lookup & the 8 Best ... - AOL

    www.aol.com/finance/free-reverse-phone-lookup-8...

    5. GreatPeopleSearch. GreatPeopleSearch is a user-friendly free reverse phone number lookup site that provides searchers with fast and accurate results. It draws on publicly available national ...

  7. Contact AOL customer support - AOL Help

    help.aol.com/articles/account-management...

    GET. Mail. Call live aol support at. 1-800-358-4860. Get live expert help with your AOL needs—from email and passwords, technical questions, mobile email and more.

  8. Find me/follow me - Wikipedia

    en.wikipedia.org/wiki/Find_me/follow_me

    Multiple phones ringing at once: A caller dials your virtual phone number. Simultaneously, your cell phone, home phone, and office phone all ring at the same time. Sequential phones ringing: A caller dials your virtual phone number. Your home phone rings first, your cell next, then your home office phone. If there is no answer on any phone, the ...

  9. Asterisk (PBX) - Wikipedia

    en.wikipedia.org/wiki/Asterisk_(PBX)

    Asterisk is a software implementation of a private branch exchange (PBX). In conjunction with suitable telephony hardware interfaces and network applications, Asterisk is used to establish and control telephone calls between telecommunication endpoints such as customary telephone sets, destinations on the public switched telephone network (PSTN) and devices or services on voice over Internet ...

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