Question: Which logical channel is used to send the RADIO BEARER SETUP message from the System Simulator to the User Equipment (UE) in the context of setting up a speech radio access bearer?
Option 1: DTCH (Dedicated Traffic Channel)
Option 2: CTCH (Common Traffic Channel)
Option 3: DCCH (Dedicated Control Channel)
Option 4: BCCH (Broadcast Control Channel)
Explanation: In setting up a speech radio access bearer, the RADIO BEARER SETUP message is sent over a channel handling dedicated control information between the network and UE. The DCCH is designed for transmitting dedicated control plane information, making it suitable for sending the RADIO BEARER SETUP message in this scenario, utilizing reliable transmission protocols.