you need to see the logs of sip_debug.log and sip_server.log. mine looks like this
sip_server.log
<!-- Use the Trace Viewer in src/tools/tracesviewer to view this trace Here are the stack configuration properties javax.sip.IP_ADDRESS= btg199251 javax.sip.STACK_NAME= JitsiVideobridgeStack javax.sip.ROUTER_PATH= null javax.sip.OUTBOUND_PROXY= null --><description logDescription="JitsiVideobridgeStack" name="JitsiVideobridgeStack" auxInfo="null"/>
sip_debug.log
WARN - using default tls security policy INFO - the sip stack timer gov.nist.javax.sip.stack.timers.DefaultSipTimer has been started