Andy, is there an updated Firmware for the Dahua SD22404T-GN? When I initially plug it in, the PTZ functions and video stream work properly, but after about 30 minutes, the PTZ functions quit responding, but the video stream is still visible. [NTSC]DH_SD-Mao-Rhea_MultiLang_NP_Stream3_IVS_V2.623.0000000.7.R.181124 is currently installed.