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2. Internet Telephony Services Providers' Association - Wikipedia

   en.wikipedia.org/wiki/Internet_Telephony_Services...

   Best Consumer VoIP: BT Group; Best Business ITSP (Small Enterprise): VoiceHost; Best Business ITSP (Medium Enterprise): Voxhub; Best Business ITSP (Corporate): Timico; Best VoIP CPE: Grandstream Networks – GXP2200 Enterprise Application Phone for Android™ Best VoIP Infrastructure: Genband – GENBAND Web Application Manager (WAM)

3. List of VoIP companies - Wikipedia

   en.wikipedia.org/wiki/List_of_VoIP_companies

   United States and UK: Cloud-based telephone systems Sipgate: Düsseldorf: Germany: 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 ...

4. List of mobile virtual network operators in the United Kingdom

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

   Ceased UK operations. Extreme Connect: O2? Family Mobile: EE: 31 August 2015 [41] Ceased operations. FreedomPop: Three? Ceased UK operations. Fresh Mobile: T-Mobile: 19 March 2010 [42] Ceased operations. Existing customers were encouraged to move to the sister network, Talkmobile. KCOM Mobile: O2: 2019 GT Mobile: O2: July 2016

5. Category : Telecommunications companies of the United Kingdom

   en.wikipedia.org/wiki/Category:...

   Internet service providers of the United ... (3 P) M. Mobile phone companies of the United Kingdom (5 C, 31 ... Virgin Media O2 (2 C, 3 P) VoIP companies of the ...

6. 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.

7. List of mobile network operators in Europe - Wikipedia

   en.wikipedia.org/wiki/List_of_mobile_network...

   A mobile network operator, also known as a wireless service provider, wireless carrier, cellular company, or mobile network carrier is a provider of wireless communication services. The main mobile network operators in Europe are listed below.