The device is a VoIP phone that is connected via Ethernet and is certified for Microsoft Teams. It is not explicitly labelled as compatible with the Yeastar P320 telephone system. As the Yeastar P320 is a separate telephone system with SIP support, SIP compatibility could exist in principle, but the MP56 E2 is specifically designed for Microsoft Teams and is not primarily certified for other telephone systems. Direct compatibility with the Yeastar P320 is therefore not guaranteed and should be checked with the manufacturer or specialist dealer before use.