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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 calling experience with features like: SIP + IAX protocols, SIP over TCP/TLS/UDP(STUN support), Echo cancellation, DTMF tones, Multiple audio devices support, Automatic user registration, Call transfer, Hold function, Multilanguage support, Portable storage compatibility, Codecs: GSM, ulaw, alaw, speex, ilbc |
