Analog system and IP network system will be co-exist

The increasing demands for enterprise security and personal safety, as well as property's security, along with decades of evolve of video surveillance systems. The IP surveillance system stage is approaching. IP system will replace the traditional analog system and dominate the market is the inevitable trend for the video surveillance industry.  How to move the system from traditional analog one to IP system, also keep the exist analog system ?  We provide some tips in this article.