Question: In a Circuit Switched (CS) domain, what is the primary purpose of the 'Number of Forwarding' field when provided via ISUP signalling?
Option 1: To indicate the number of simultaneous calls handled by the HLR
Option 2: To track the number of times a call has been forwarded before reaching the final destination
Option 3: To specify the protocol version used for the call setup
Option 4: To identify the type of User Equipment (UE) initiating the call
Explanation: The correct answer reflects the field's purpose in CS domain charging management, highlighting the importance of tracking call forwarding instances for billing, charging processes, and optimizing network performance by analyzing call routing complexities.