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VoIP SIP SDK - A powerful and highly versatile VoIP SDK. Our SIP SDK provides a powerful and highly versatile solution to add quickly SIP (Session Initiation Protocol) based dial and receive phone calls features in your software applications.

Collanos Phone is a software-only Voice over Internet Protocol (VoIP) phone and a multi-protocol instant messenger supporting Jabber, MSN, ICQ, AOL, and Yahoo! protocol combined in one application. It is available on Windows, Mac OSX, and Linux.

Collanos Phone is a software-only Voice over Internet Protocol (VoIP) phone and a multi-protocol instant messenger supporting Jabber, MSN, ICQ, AOL, and Yahoo! protocol combined in one application. It is available on Windows, Mac OSX, and Linux.

Collanos Phone is a software-only Voice over Internet Protocol (VoIP) phone and a multi-protocol instant messenger supporting Jabber, MSN, ICQ, AOL, and Yahoo! protocol combined in one application. It is available on Windows, Mac OSX, and Linux.

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.

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.

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.

3CX Phone System Free edition is a SIP based IP PBX. Scaleable, eliminates phone wiring and lowers call costs via VOIP providers. Developed for Windows - Easy to install and configure! Download FREE edition with no limitations or time outs.

3CX Phone System FREE edition is a SIP-based IP PBX developed for Windows. Easy to install & configure, scalable, eliminates phone wiring & allows hot desking. Lowers call costs via VOIP providers & eliminates vendor lockin. Download FREE edition!