ZOIPER 2.0 Free SIP and IAX is a user-friendly softphone, compatible with Asterisk or any other SIP or IAX capable system. High-quality VoIP experience with features like: SIP + IAX protocols, T.38 fax support, STUN support, Echo cancellation, DTMF tones, Adaptive jitter buffer, Call transfer, Hold function, Multilanguage support, Portable storage compatibility, Codecs: GSM, ulaw, alaw, speex, ilbc....
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Support for Zoiper Free IAX and SIP softphone is available from the
publisher/developer site This download (Zoiper Free IAX and SIP softphone) is freeware. "Freeware is copyrighted computer software which is made available for use free of charge, for an unlimited time, as opposed to shareware where the user is required to pay (e.g. after some trial period or for additional functionality)." More info at
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Soft32 (ITNT) cannot be held liable for issues that arise from the download or use of these software products. We encourage you to determine whether this software or your intended use is legal. Even if we try to check the program files for viruses, we cannot guarantee 100% that they are clean. For your own protection always check downloaded files for viruses, spyware and malware. 
