Patent ID: 6865266

Claim:
A method of servicing telephone calls using an Internet protocol network and a telephone network the telephone network including first and second telephone switches each being coupled to at least one service control point, the second telephone switch being coupled to the first telephone switch and the Internet Protocol network, the method comprising the steps of: pausing processing of a telephone call directed to a first telephone number at said first telephone switch, in response to activation of a first trigger set at said first telephone switch, the first trigger being activated by a call directed to a telephone number including a digit string matching at least a portion of said first telephone number, obtaining a call processing instruction including a second telephone number corresponding to said second telephone switch from a service control point; forwarding the call to the second telephone switch using the second telephone number as a called party number for purposes of routing said telephone call, and operating the second telephone switch, in response to receiving the forwarded call, to: i) replace the second telephone number with the first telephone number; ii) contact a service control point to provide at least one advanced intelligent network service subscribed to by the called party, said service being one of a call screening and a Centrex service and to obtain call routing information corresponding to said first telephone number; and ii) route the telephone call to the Internet Protocol network using Internet Protocol routing information returned by said service control point.