The OVR which comprises of a DVR unit and several cameras (minimum 1 camera, maximum 8 cameras) is installed on board vehicle. Cameras are mounted inside or outside the vehicle using drilling method to ensure it withstands strong vibrations. Users are encouraged to advise the location and angle of the cameras to ensure viewing of video is beneficial. Power supply is tapped from vehicle battery thus, it cannot be switched on or off using manual switch.
Once the hardware is installed, users can access video recordings via download of memory storage. If users opt to subscribe to 3G SIM card, videos can be streamed online by keying-in a unique username and password on client-based / web-based software / smartphone app.
As video files contain both audio and visual information, its files are HUGE. Imagine downloading a movie file, which is similar. With this in consideration, video files are not automatically streamed. Instead, user would have to call to device to view the videos. Best practice would be to wait for the vehicles to arrive back at its parking yard and download either via USB or WiFi. Charges differ for usage of 3G SIM card as opposed to having an internal storage in DVR.
Information is stored in the OVR depending on the storage method user chooses. Once the memory is full, recordings will be over written. However, the OVR will store Alarm files which cannot be over written until it is downloaded by the user.
OVR is different in several sense: