The digital call server can accomplished many fuction
eg authentication for user
authorization for user
account of user
encryption of information
agenting of network
receiving the requirement of customer
upbuilding disputation
connect control
business logic control. This paper also proposaled the conception and the whole configuration of digital platform of intelligent telephone system. According to the demanding of fuction
it is designed and accomplished the digital call server in digital platform of intelligent telephone system. Digital call connection server is the key point of the whole platform
digital platform of intelligent telephone system can provide abundant services only under the control of digital call connection server.