A method and apparatus for providing a telephone operating company with the ability to rapidly deploy advanced services into a public switched telephone network includes a programmable service node interacting with a programmable switch matrix. The call processing of a call (associated with one or more...http://www.google.com.tw/patents/US6028924?utm_source=gb-gplus-share專利 US6028924 - Apparatus and method for controlling processing of a service call
