When you enable Call Prompting and Call Vectoring, Communication Manager collects Caller Entered Digits (CED) and Customer Database Provided Digits (CDPD) from the network. Communication Manager receives Call Information Forwarding (CINFO) digits in the ISDN message of an incoming call when the AT&T Network Intelligent Call Processing (ICP) service is in use. Communication Manager then collects and forwards the digits to another Communication Manager using interflow commands.