How does a DVR system work?

A DVR is the recording device which stores all the images onto internal Hard Drives from up to 16 CCTV cameras and view all 16 on a display.
Recordings can be played back from all the cameras or one at a time. A user can go back to any time in the recording and playback a recording in a matter of
seconds.

The recorded images can be stored to Hard drives or CDs and archived for as long as necessary.

The DVRs can be controlled, viewed to recording can be played back over the Internet using an Internet Browser or a Client software. This allows you to view your premises from anywhere in the world, additionally, any PTZ cameras can be controlled remotely, over the internet.

A stand alone DVR, like the Nabishi 6000/9000, is a true Digital Video Recorder designed for security and is a sophisticated system composed of hardware components, software programs and sub-assemblies with built-in checks and balances. It all must work in unison to create a robust and reliable piece of equipment, designed for mission critical applications. This is not to be confused with the TiVo or other set top cable boxes that are also known as “Sky or Television DVR's.” They are in not related. Creating a DVR solution requires a dedicated team of software and hardware engineers, database programmers and system designers, plus support personnel. Since we are talking about security where there is no margin for error. These applications take years to develop and debug.

a typical DVR based CCTV network

DVR, video surveillance, CCTV, Digital Video Recorder; it's all so confusing. Video security is a mission critical application. The surveillance equipment you buy must do what it designed to do; surveillance. The last generation of surveillance systems, were plagued by long cumbersome procedures, and ineffective results. Although digital surveillance technology has revolutionized the video security business whether it is home surveillance or commercial; caveat emptor; let the buyer beware. All Digital Video Recorders (DVR) are not alike. While the predecessor equipment was CCTV monitors plugged into Time Lapse Recorders, the latest digital video surveillance technology relies upon either stand alone units like the Nabishi 9000 series or alternatively, PC-based software which operates in conjunction with DVR cards (video cards which plug into computer terminals.

One of the main advances in video surveillance is the ability to remotely monitor the Digital Video Recorder (DVR) over the Internet from anywhere in the world. In order to accomplish this task there are a number of not so obvious issues that many "alleged" manufacturers of Digital Video Recorders (DVR) fail to reveal. So when people ask us what is it that makes the Nabishi 9000 the leading video surveillance solution, we tell them that at the heart of our stand alone unit there is a reliable and robust database structure.