Advice of Charge (AoC) supplementary services; Stage 1
The present document describes the supplementary services belonging to the group Charging Supplementary Services.
The general aspects, including definitions and recommended provision, of the description of the supplementary services are given in TS 22.004 [2].
Charging services are the supplementary services associated with charging aspects. The group of supplementary services Charging Supplementary Services comprises two services:
- Advice of Charge (Information) - clause 1;
- Advice of Charge (Charging) - clause 2.
Advice of Charge (AoC) supplementary services will use the Charge Advice Information described in  22.024 [3].
In principle, the same type of Mobile Station (MS) can be used for both services of Advice of Charge (AoC), except where the application demands special features - e.g. the payment mechanism in a payphone.
Only one of these services may be subscribed to at any one time.