A system and method for permitting the switches of a telecommunications network to process a call and deliver Automatic Number Identification information elements of Charge Number, Calling Party Number, and Presentation Indicator across the network. Upon receipt of a call from an origination trunk group,...http://www.google.ca/patents/US5901207?utm_source=gb-gplus-sharePatent US5901207 - System and method for charge number/calling party number switch call processing
