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	SIP Softphone ActiveX 1.1 SIP Softphone ActiveX - A powerful and highly versatile VoIP SDK. Our SIP Softphone ActiveX provides a powerful and highly versatile solution to add quickly SIP based dial and receive phone calls features in your software applications. sip sdk, SIP RTP, RTP, SIP activeX, SIP Lib free download trial (7.95 Mb)

	PC-Telephone 6.2 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. pc-telephone, pc-phone, pc-to-phone, pc-pc, pc-to-pc free download trial (1.32 Mb) :: order online ($35.00)

	Billion Softswitch 3.0 Billion Softswitch VoIP SIP/H323 proxy server for Windows, Linux, FreeBSD. Billion Softswitch is a software system for intellectual proxy of signaling and media streams in the VoIP-networks based on SIP and H.323 protocols. softswitch, ip pbx, IP-telephony, VoIP, H323 free download trial (8.47 Mb)



	Enigma Softphone 0.8.8 Enigma is a free Session Initiation Protocol (SIP) softphone available for your download. It can used to make Internet calls, establish conference and send instant messages to your buddies under the same SIP network. Choose your platform see features Enigma, softphone, free softphone, free calls, SIP free download (20.8 Mb)

	VaxVoIP SIP Desktop SDK 3.8 VaxVoIP SIP Desktop SDK provides tools and components to quickly add SIP (Session Initiation Protocol) based webphone, softphone and IVR systems for Desktop OS and Mobile-Phones. sip sdk, webphone, develop softphone, softphone development, sip activex free download trial (32 Mb)

	VoIP Tunnel 1.0.2 VoIP Tunnel technology by SecureVoIP in order to enable making and receiving VoIP calls for users who are behind firewalls that block VoIP traffic, especially in countries like UAE, Oman and others with internet restrictions. voip, tunnel, vpn, encryption free download trial (690 Kb)



	3CXPhone FREE VoIP Phone for Windows 4.0 Free VOIP / SIP phone (softphone) for Windows. Use your PC as a phone. Works with popular VOIP providers and SIP PBX's (including 3CX Phone System). Easy to use & light weight. Full version, not a lite version! Free download from http://www.3cx.com VOIP Phone, SIP Phone, soft phone, VOIP, IP PBX free download (3.39 Mb)

	Mizu Softswitch 4.2.1 The Mizu VoIP Server is an all in one enterprise grade soft switch solution with support to SIP and H.323. All Class5 features including sophisticated routing, access rules, CDR record generation, billing and accounting. softswitch, voip server, sip server, sip proxy application, windows softswitch free download trial (32 Mb)

	Billion PBX 2.0 Billion PBX - new generation phone system working in IP-networks using SIP protocol. Billion PBX provides not only voice calls but also a whole range of additional features like call forwarding, voicemail, callback and many others. phone system, PBX, voip, sip, ip-telephony free download trial (12.67 Mb)

	StarTrinity SIP Tester 3.1 SIP tester is a free VoIP load testing tool which enables you to test VoIP network, SIP software or hardware. It is able to simulate thousands of simultaneous incoming and outgoing SIP calls with RTP media, analyze call quality in real time. SIP, VoIP, Performance, Test, Tester free download (3.83 Mb)