This indicates a failed flash (bricked device). You can try a hard reset:
Locate the upgrade menu, usually found under , Advanced , Firmware Upgrade , or Device Management . Click Browse or Choose File . yeacomm p11 firmware download free
Connect your computer to the Yeacomm P11 via an Ethernet cable through the PoE adapter. Open a web browser and enter the default IP: 192.168.0.1 . This indicates a failed flash (bricked device)