Service Providers SIP Protocols Internet

SIP based VoIP and IM Service Providers.

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  • - Swiss SIP proxy service provider with Swiss phone numbers. Member service providers of the freecall network.
  • Simwood eSMS - Provides UK phone number SIP termination for ISPs, ITSPs, call centres, calling card providers, and carriers.
  • Free IP Call - UK/French SIP proxy service provider with 0845 non-geographic sip phone numbers.

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