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2. List of VoIP companies - Wikipedia

   en.wikipedia.org/wiki/List_of_VoIP_companies

   VoIP communications for small businesses, home and mobile Radvision: New Jersey: United States: Video conferencing and telepresence technologies RingCentral: Belmont, CA and London: United States and UK: Cloud-based telephone systems Sipgate: Düsseldorf: Germany: VoIP and mobile phone services sipservice: Winterthur: Switzerland: VoIP service ...

3. Comparison of cross-platform instant messaging clients

   en.wikipedia.org/wiki/Comparison_of_cross...

   [110] [111] VoIP number [112] VoIP workaround [112] Yes No Yes [113] No Skype: Email; Microsoft account Yes No No No Slack: Email Yes No No No Snapchat: Email or Phone number No No No No Surespot: No No No TeamNote: Telegram: Phone number; iOS or Android device [114] Phone required for initial registration & login. Desktop client can function ...

4. Comparison of VoIP software - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_VoIP_software

   This is a comparison of voice over IP (VoIP) software that examines applications and systems used for conducting voice and multimedia communications across Internet Protocol (IP) networks. VoIP technology has transformed telecommunications by offering alternatives to traditional telephony systems while providing enhanced features and cost savings.

5. Why these VoIP services are the best for calling family and ...

   www.aol.com/why-voip-services-best-calling...

   Most VoIP services involve a subscription fee on a rolling basis, but they often end up saving you money in the long term by providing you with free or low-cost calls as part of a bundle deal ...

6. 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 four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.

7. List of SIP software - Wikipedia

   en.wikipedia.org/wiki/List_of_SIP_software

   Dialexia VoIP Softswitches, IP PBX for medium and enterprise organizations, billing servers. IBM WebSphere Application Server - Converged HTTP and SIP container JEE Application Server; Interactive Intelligence Windows-based IP PBX for small, medium and enterprise organizations; Kerio Operator, IP PBX for small and medium enterprises