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2. 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 countryv—AT&T Mobility, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.

3. FreePBX - Wikipedia

   en.wikipedia.org/wiki/FreePBX

   FreePBX is a web-based open-source graphical user interface (GUI) that manages Asterisk, a voice over IP (VoIP) and telephony server. [2] FreePBX is licensed under the GNU General Public License version 3, [3] with commercial modules available under their own licenses. FreePBX is a component of the now discontinued FreePBX Distro, released by ...

4. 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 ...

5. Virtual number - Wikipedia

   en.wikipedia.org/wiki/Virtual_number

   A virtual number, also known as direct inward dialing (DID) or access numbers, is a telephone number without a directly associated telephone line. Usually, these numbers are programmed to forward incoming calls to one of the pre-set telephone numbers, chosen by the client: fixed, mobile or VoIP. A virtual number can work like a gateway between ...

6. VirtualPBX - Wikipedia

   en.wikipedia.org/wiki/VirtualPBX

   On the technology front, the company released its skills-based routing feature in 2004 [3] and in 2006, released a number of new features including AutoRoute, which allows calls to automatically be sent directly to ACD queues, support or sales personnel, individual extensions, or voicemail, based on the caller's area code, area code and prefix ...

7. IP PBX - Wikipedia

   en.wikipedia.org/wiki/IP_PBX

   IP PBX. An IP PBX (" Internet Protocol private branch exchange ") is a system that connects telephone extensions to the public switched telephone network (PSTN) and provides internal communication for a business. An IP PBX is a PBX system with IP connectivity and may provide additional audio, video, or instant messaging communication utilizing ...