With the development of the social economy and technology at full speed, especially the development of the computer network, people require safety technology of protection in higher and higher. In order to attach various economic crimes, protect safety of life and property of the country and people, ensure the normal operation of every walk of life and every social department; adopt HI-Tech means to prevent various kinds of crimes, which will become development direction of field of safe precaution
     From the end of the eighties of the 20th century to middle period of the 1990s, with the introduction of various kinds of new-type security protection ideas, every department of society, every walk of life and denizen all set up each independent closed circuit TV monitoring system and network warning system one after the other. Network warming system has basically formed in some key department such as bank, communication and electricity, etc., which play more important function to prevent crimes and protect stabilization of social economy.
      However, the traditional video monitoring and warming network system are limited by development level technology at that time, Most TV monitoring system just only carry on analog monitoring at the scene. Though warming network can transmit warming information in long distance, warming information of transmission is simple, can't transmit the picture and unable to know the actual condition of the scene in time, it is difficult to ensure warming incident and systematic efficiency is very low.
     Use existing analog system or existing hard disk recorder to monitor deficiency of these network point as follows:

not centralized monitoring and remote controlling

    Analog video or hard disk video can basically fill for the demand of local control, but the existing equipment is unable to network, unable to concentrate on controlling, the systematic interaction is extremely bad, and control center is very difficult and fast convenient to monitor and transmit video with numerous branch.

next