Stage 2 Description for Charging Supplementary Services Clause 2 - Advice of Charge (AOC) - General Recommendations on Telephone Switching and Signalling Functions and Information Flows for Services in the ISDN
This Recommendation provides the stage 2 service description of the Advice of Charge supplementary service.This service allows the served user to be informed of usage-based charging information.The served user may request this information at call set-up time and/or during the call and/or at the end of the call.