Developer - Portsip Terms of use - Freeware Supported Operating System - Windows 2000, XP, Vista, Seven Note: the program requires .NET Framework 2.0 or above Supported features: audio/video calls, text messaging, presence service Supported codecs: G.723, G.729, G.711, GSM, ilbc, H.263, H.264
After installation when you first start the program asks for the registration data for the connection:
Pangolin - this is the only free software telephone with such opportunities. Its development the company is engaged Portsip. Its main disadvantage is the lack of stability. But, since developers are constantly working on the improvement of the product, we can hope for a more stable releases already in the near future.
SIP telephony - from SIP-system
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