Based on IP network, DSD built a complete city surveillance system to provide a whole series of solution including 

surveillance front end devices, intelligent traffic photo capture devices, management platform, storage, custom services 

for public security etc. The center of the system is IMOS (IP Multimedia Operation System). IMOS is open for the 

integration of various kinds of surveillance resources, alarm resources and information. After the integration, useful 

information could be extracted by intelligent analysis tools for analyzing and judging. And finally, the practical service 

system is built to use all of the resources. Hence, the public security and city management departments are equipped 

with technologies to monitor the city security, road traffic conditions, traffic violations for 24 hours every day.