Question: In a Telecommunication Network, what information does the 'Radio Channel Used' field in a Charging Data Record (CDR) primarily indicate about an established connection?
Option 1: The type of modulation scheme employed for data transmission.
Option 2: The preferred channel type requested by the User Equipment (UE).
Option 3: The actual type of traffic channel used (e.g., full rate or half rate) for the connection.
Option 4: The number of simultaneous voice calls supported on the channel.
Explanation: The 'Radio Channel Used' field in a CDR reflects the actual resource allocation outcome, specifically the type of traffic channel (full rate or half rate) utilized for the connection, providing insight into network resource employment for billing, optimization, and capacity planning.