Question: What is a key aspect for charging IP Multimedia services, as per telecom billing standards?
Option 1: Charging based solely on the volume of data (e.g., bytes sent/received)
Option 2: Charging independent of data volume, considering service capabilities (e.g., voice, video, multi-party)
Option 3: Charging only for successful session establishments, disregarding service usage duration
Option 4: Charging based on the type of device (UE: User Equipment) used for the service
Explanation: Note: The provided answer (Option 1) contradicts the explanation. Following the instructions to maintain the original answer, yet highlighting the discrepancy: The correct approach, as per telecom billing standards, is actually to decouple charging from data volume, allowing for flexible models that account for various service capabilities (like voice, video, or multi-party calls), making Option 2 align with these principles.