Question: In CAMEL Phase negotiations between HLR-VLR for a subscriber, what approach does the gsmSSF take when initiating a dialogue with the gsmSCF to avoid case-by-case fallbacks?
Option 1: Uses the latest CAP phase available on the network
Option 2: Employs a default CAP phase unless overridden by the gsmSCF
Option 3: Selects a CAP phase based on the type of call (e.g., mobile originated, terminated)
Option 4: Utilizes the CAP phase corresponding to the CAMEL phase negotiated on the HLR-VLR interface per subscriber
Explanation: This approach ensures seamless compatibility and avoids potential fallback issues by aligning the CAP phase used by the gsmSSF with the specifically negotiated CAMEL phase for each subscriber, as determined during the HLR-VLR negotiation. This method optimizes communication efficiency between the gsmSSF and gsmSCF on a per-subscriber basis.