Question: What is the potential consequence of anchoring an incoming CS (Circuit Switched) call at the SCC AS (Service Centralization and Continuity Application Server) using certain implementation options, prior to onward routing to a subscriber with IMS (IP Multimedia Subsystem) services?
Option 1: The call may create a circular loop between CS and IMS domains, requiring additional handling to prevent infinite routing.
Option 2: The call will always be terminated in the IMS domain without any possibility of return to the CS domain.
Option 3: The SCC AS will automatically convert the call to a VoIP (Voice over Internet Protocol) call to prevent domain switching.
Option 4: The subscriber's service (e.g., ICS, SC, SR-VCC) will be temporarily suspended during the call anchoring process.
Explanation: When an incoming CS call is anchored at the SCC AS and then routed back to the CS domain for determining the CSRN for CS termination, it can lead to re-routing back to the IMS for anchoring again, potentially creating a circular loop between the two domains if not properly managed. This highlights the importance of careful handling to prevent such infinite routing loops in telecom networks.