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  2. List of VoIP companies - Wikipedia

    en.wikipedia.org/wiki/List_of_VoIP_companies

    VoIP and mobile phone services sipservice: Winterthur: Switzerland: VoIP service provider TELES AG: Berlin: Germany: VoIP services VirtualPBX: San Jose, CA: United States: Cloud-based telephone systems VocalTec: West Palm Beach and Netanya: United States and Israel: Telecom equipment provider VoiceHost: London: United Kingdom: VoIP and DSL ...

  3. Location information server - Wikipedia

    en.wikipedia.org/wiki/Location_Information_Server

    The location information server, or LIS is a network node originally defined in the National Emergency Number Association i2 [1] network architecture that addresses the intermediate solution for providing e911 service for users of VoIP telephony. The LIS is the node that determines the location of the VoIP terminal.

  4. Telephone number mapping - Wikipedia

    en.wikipedia.org/wiki/Telephone_number_mapping

    The regular expression can be used by a telephone company to easily assign addresses to all of its clients. For example, if your number is +15554242, your SIP address is sip:4242@555telco.example.net; if your number is +15551234, your SIP address is sip:1234@555telco.example.net.

  5. Virtual number - Wikipedia

    en.wikipedia.org/wiki/Virtual_number

    Businesses – a company located in China can have a phone number in Los Angeles or London without paying for a fixed foreign exchange line. Virtual numbers are very popular among call centers which appear to be located in one country, when they are in one or more countries in different time zone, delivering efficient 24/7 cover.

  6. Mobile phone tracking - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone_tracking

    An indoor location tracking map on a mobile phone. Mobile phone tracking is a process for identifying the location of a mobile phone, whether stationary or moving. . Localization may be affected by a number of technologies, such as the multilateration of radio signals between (several) cell towers of the network and the phone or by simply

  7. List of companies in the Chicago metropolitan area - Wikipedia

    en.wikipedia.org/wiki/List_of_companies_in_the...

    This is a list of companies in the Chicago metropolitan area.The Chicago metropolitan area – also known as "Chicagoland" – is the metropolitan area associated with the city of Chicago, Illinois, and its suburbs. [2]

  8. Airport Transit System - Wikipedia

    en.wikipedia.org/wiki/Airport_Transit_System

    The Airport Transit System (ATS) is an automated people mover system at Chicago O'Hare International Airport. It opened on May 6, 1993. It opened on May 6, 1993. The ATS moves passengers between the airport terminals and parking facilities, and was designed to operate 24 hours a day, 7 days a week.

  9. Local number portability - Wikipedia

    en.wikipedia.org/wiki/Local_number_portability

    Local number portability (LNP) for fixed lines, and full mobile number portability (FMNP) for mobile phone lines, refers to the ability of a "customer of record" of an existing fixed-line or mobile telephone number assigned by a local exchange carrier (LEC) to reassign the number to another carrier ("service provider portability"), move it to another location ("geographic portability"), or ...

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