Differencing effects for different subscribers makes color ring back tone service success. ZMCC （Zhejiang Mobile Communication Corporation） deployed an intelligent network based CRBT solution. However

in this solution

different switch based solution is also concerned. The hybrid solution makes the network resources consuming minimum and the same service feature of CRBT service covers the whole range of Zhejiang province. Ring file sever makes the solution have distributed feature. And the data synchronous function makes subscribers have the ability to manage their CRBT service everywhere.