CONTENTS

 3     Reverse Charging (REV)
        3.1     Introduction
        3.2     Description
        3.3     Operational requirements
        3.4     Coding requirements
        3.5     Signalling requirements
        3.6     Interaction with other supplementary services
        3.7     Interactions with other networks
        3.8     Signalling flows
        3.9     Parameter values (Timers)