Question: In an IMS interconnection scenario involving multiple operators, what determines whether all involved transit carriers are considered for charging or only the immediately adjacent ones?
Option 1: The type of interworking scenario between IMS-based networks and other types of networks.
Option 2: The operator-specific policy regarding IMS transit charging in a multi-operator environment.
Option 3: The number of transit operators between the originating and terminating operator.
Option 4: The support for N/ISDN Emulation by TISPAN NGN networks involved in interworking.
Explanation: According to the principles outlined, the decision on whether to consider all involved transit carriers or only the immediately adjacent ones for IMS transit charging is based on the operator-specific policy. This highlights the importance of policy-based decisions in managing and charging for IMS services across multiple operators.