GitHub - sippy/b2bua: Sippy B2BUA is a RFC3261-compliant Session Initiation Protocol (SIP) Back-to-back user agent (B2BUA) server software.

Kamailio SIP Server

Welcome to kamailio the open source sip server kamailio successor of former open ser and ser is an open source sip server released under gp lv2 able to handle thousands of call setups per second kamailio can be used to build large platforms for vo ip and realtime communications presence web r

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The Next-generation SIP Server

GitHub - BelledonneCommunications/flexisip: Linphone.org mirror for flexisip (git://git.linphone.org/flexisip.git)

Linphone org mirror for flexisip git git linphone org flexisip git git hub belledonne communications flexisip linphone org mirror for flexisip git git linphone org flexisip git