Lifeline mode does not work on HT813 if WAN port disconnected


Lifeline mode is activated correctly in case the connection to the SIP server is lost but if the directly connected WAN cable is disconnected or the directly connected switch fails (Ethernet link loss), no lifeline switchover occurs. The HT813 keeps announcing “Device not registered”. If the network failure occurs somewhere else, the connection loss is detected and the lifeline switchover is working corretly but not by disconnecting the directly connected Ethernet cable. Could this be a bug?