Avaya Vantage Open is a SIP client that works seamlessly with Avaya Vantage device. It delivers an easy-to-use, full-featured voice communications experience on 3rd party hosted call control infrastructure. Features: Easy to configureFlexible Codec selection and prioritizationAuthentication usernameDial planSelectable ringtoneAcoustic echo cancellation/automatic microphone gain controlAccess to native contact list. Favorites/ Speed Dial. Call history/contact managementVoicemail integration/notificationHold/Resume/RedialIn call contact pictureConfigurable DTMF (SIP INFO/ RFCs 2833/4733/RTP inband) ;Notifications Center Support for missed calls, voicemail and registration statusBlocked Numbers listCodecs: Included G. 711 (ulaw &Alaw), iLBC, G. 722 (Wideband), Opus, G. 729Support UDP and TCPCall Waiting/2nd call/call toggle/call transfer/ conferenceSecured SIP Transport (TLS) Secured Encrypted Media (SRTP) with SDESLanguage: English, French, German, Spanish, Portuguese, Arabic, Japanese, Chinese (Simplified), Russian, Turkish Compatible Enterprise IP-PBX & SIP servers: Broadsoft (certified). 2600Hz. Aastra. Asterisk. Ericsson. FreePBX. FreeSwitch. Kamailio. Nokia-Siemens. OpenSIPS. Panasonic. Samsung. sipXecs. Sylantro. Unify OpenScape. And many more.