Hey all Dahua combined the program package 4XXX to the program package 5XXX, so from now on, all 4.0 AI version will move to this firmware, here are the list for your reference.
IPC-T5442TM-AS, IPC-T5442TM-AS-LED IPC-T5241TM-AS IPC-HDW5541TM-AS IPC-B5442T-ASE IPC-T5241H-AS-PV
IPC-T5442T-ZE...