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  2. Voice over IP - Wikipedia

    en.wikipedia.org/wiki/Voice_over_IP

    Full-service VoIP phone companies provide inbound and outbound service with direct inbound dialing. Many offer unlimited domestic calling and sometimes international calls for a flat monthly subscription fee. Phone calls between subscribers of the same provider are usually free when flat-fee service is not available.

  3. Public switched telephone network - Wikipedia

    en.wikipedia.org/wiki/Public_switched_telephone...

    The public switched telephone network ( PSTN) is the aggregate of the world's telephone networks that are operated by national, regional, or local telephony operators. It provides infrastructure and services for public telephony. The PSTN consists of telephone lines, fiber-optic cables, microwave transmission links, cellular networks ...

  4. Portal:Telephones - Wikipedia

    en.wikipedia.org/wiki/Portal:Telephones

    The Telephones Portal. A rotary dial telephone, c. 1940s. A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be easily heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals that are transmitted via cables ...

  5. Telephony - Wikipedia

    en.wikipedia.org/wiki/Telephony

    Telephony ( / təˈlɛfəni / tə-LEF-ə-nee) is the field of technology involving the development, application, and deployment of telecommunication services for the purpose of electronic transmission of voice, fax, or data, between distant parties. The history of telephony is intimately linked to the invention and development of the telephone .

  6. Want big-screen video calls with friends and family ... - AOL

    www.aol.com/lifestyle/want-big-screen-video...

    The Portal TV installs on nearly any TV to deliver big-screen Messenger, WhatsApp and Zoom calls. (Photo: Facebook) Here's the thing about video calls: They're small, especially on a phone or tablet.

  7. Contact center telephony - Wikipedia

    en.wikipedia.org/wiki/Contact_center_telephony

    In marketing, contact center telephony is the communication and collaboration system used by businesses to either manage high volumes of inbound queries or outbound telephone calls keeping their workforce or agents productive and in control to serve or acquire customers.

  8. 311 (telephone number) - Wikipedia

    en.wikipedia.org/wiki/311_(telephone_number)

    311 is a special telephone number supported in many communities in Canada and the United States. The number provides access to non-emergency municipal services. The number format follows the N11 code for a group of short, special-purpose local numbers as designated in the North American Numbering Plan . The telephone number 3-1-1 creates a ...

  9. Telephone exchange - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange

    Telephone exchange. A telephone operator manually connecting calls with cord pairs at a telephone switchboard. A modern central office, equipped with voice communication and broadband data capabilities. A telephone exchange, also known as a telephone switch or central office, is a crucial component in the public switched telephone network (PSTN ...

  10. Telephone call - Wikipedia

    en.wikipedia.org/wiki/Telephone_call

    A telephone call or telephone conversation (or telcon [1] [a] ), also known as a phone call or voice call (or simply a call ), is a connection over a telephone network between the called party and the calling party. Telephone calls started in the late 19th century. As technology has improved, a majority of telephone calls are made over a ...

  11. Secure telephone - Wikipedia

    en.wikipedia.org/wiki/Secure_telephone

    A secure telephone is a telephone that provides voice security in the form of end-to-end encryption for the telephone call, and in some cases also the mutual authentication of the call parties, protecting them against a man-in-the-middle attack.