SIP3

Troubleshooting and monitoring VoIP calls

Easy to use but advanced IP PBX system, VoIP gateway and conference server

Scalable open source cross-platform telephony platform

Modular SIP server (registrar/proxy/router/etc)

Lightweight SIP proxy, location server, and registrar for a reliable and scalable SIP infrastructure

SIP proxy/server for voice, video, IM, presence and any other SIP extensions