Hi Guys Dahua released the newer firmware for the ptz 5 series. You can install on these cams. SD59430U-HNI SD59225U-HNI SD59230U-HNI SD52C225U-HNI SD52C230U-HNI SD50225U-HNI SD50230U-HNI PAL and NTSC is the main firmware for the camera(Download what your country use),PTZ function one is for the PTZ part,so there is no P or N. When updating the firmware, have to upload main firmware and the PTZ both, no first or second, just do it one by one. Or else the camera lost the PTZ function. After updating the 2 firmware, not forget to make a default on the camera, this is useful for all updating. Risk: Not power off or network off during the updates, or else camera will die.