exosip2, 3.6.0, 一個SIP的開源協議棧, 開發環境是Linux-SIP stack. An open source library for SIP protocol

Sofia-SIP is an open-source SIP User-Agent library, compliant with the IETF RFC3261 specification (see the feature table). It can be used as a building block for SIP client software for uses such as VoIP, IM, and many other real-time and person-to-pe