AIN based call routing and transfer methods are disclosed. In various embodiments call routing is based upon the availability of the requested party at the called premise and entered DTMF signals. DTMF signals and AIN mid-call triggers are used in some embodiments to support call transfer to voice mail...http://www.google.de/patents/US7203299?utm_source=gb-gplus-sharePatent US7203299 - Methods and apparatus for using AIN techniques to forward answered calls to one of a plurality of voice mailboxes
