2. INDEX 1.INTRODUCTION 2.HISTORY 3. ARCHITECTURE 4.ADVANTAGES 5.DISADVANTAGES 6.CONCLUSION 7. BIBLIOGRAPHY

4. History of Intelligent Networks 1960 SPCs Electro- mechanical Relay switches 1970 Support for Mgmt 1980 Centralized databases, CC and 800 -services 1985 Feature Node IN/1 1990 IN/1+ AIN Rel 0.1 IN/2 CS 1995 CS1 AIN Rel 0.2 CS2 AIN Rel 1 “ Intelligence” Time

6. ARCHITECHURE

7. THE CALL MODEL

8. SSP-SCP INTERFACE

11. CONCLUSION The main idea behind two process is decentralization . The communication delay is reduced at the cost of increased intelligence at the local level. If collaborative intelligence exceeds combinatorial complexity then there is no need of communication between controller and requirements of central process. Thus the performance matches to that of the centralized MIMO system.