Hello, I'm writing an application with PJSUA and everything works fine! Next I need the possibility to detect the disconnection of the network connection. I didn't find any callback or other method which the application notifies that the network connection is disconnected. I have tested with pjsua_transport_info but there is no information about the state of the network connection (used protocol and the SIP server IP address). The application works with the memory/buffer-based capture and pjsip fills the buffer with the silence pattern if no RTP packages are received. But I can not see any notification that the connection is lost. I use the UDP as transfer protocol. Has anybody an idea to resolve this problem? Thank you very much Norbert