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Uplink connects SIP protocol VoIP calls to the proprietary Skype phone network. It works in both directions.

SiSky Personal Edition is a Windows-based software-only application for personal SIP device users. It forwards Skype calls to their existing IP phone.

Doddle is a free online SIP webphone through which you can make phone calls from webpage.CODEC GSM, G.711 , click2call feature, conference.There is no desktop software to be downloaded at all.

H.323 SIP IAX Audio Conference Server (MCU), allows mixed conferences between H.323, SIP and IAX users. Supports various audio codecs, web interface.

ABTO Software's VoIP SIP SDK allows quick VoIP softphone app development. SIP softphone provides voice, video and IM communication, supports VPN and SRTP connection, and is compatible with most SIP servers.

OfficeSIP Alerter is a simple, easy-to-use and free instant sip messenger. It was not designed for prolonged chat, it is handy when you need to send single message. It is good replacement for old-fashioned Alerter Service.

Video VoIP SIP SDK is a solution to quickly build VoIP softphone that can dial and receive audio and video calls on your computer or add VoIP features into your software or web website.

Make FREE pc-to-pc, cheap pc-to-phone, pc-to-fax, phone-to-pc, fax-to-pc, SIP-phone calls over Internet or ISDN/PSTN telephone networks. Use your computer as internet telephone, USB phone, SIP telephone, ISDN phone, FAX, Voicemail.

Our VoIP SIP SDK provides a powerful and highly customizable solution to quickly add SIP based dial and receive phone calls features in your software applications. It accelerates the development of SIP VOIP applications.

Make FREE pc-to-pc and cheap pc-to-phone, pc-to-fax, phone-to-pc, fax-to-pc, sip-phone, sip-to-phone calls over Internet or ISDN/PSTN telephone networks. Use your computer as internet telephone, USB phone, ISDN phone, fax, voicemail, callerID.