Identify the correct firmware by the S/N Follow the table below for the differences in S/N logic between the current and new models:     DW-VG4 Current DW-VG4 New 9ch NVR Model DW-VG494P S/N TPK09~ TPN09~ F/W DW-VG49_v1.*.*.* DW-VG49N_v1.*.*.* 12ch NVR Model DW-VG4128P S/N TPK12~ TPN12~ F/W DW-VG412_v1.*.*.* DW-VG412N_v1.*.*.* 16ch NVR Model DW-VG4128P S/N TPK16~ TPN12~ F/W DW-VG416_v1.*.*.* DW-VG416N_v1.*.*.*