Question: What is a key functionality enabled by the T.120 protocol in the context of User Data Applications for circuit-switched multimedia telephony services?
Option 1: Enhanced Voice Codec for Improved Audio Quality
Option 2: Multipoint Data Conferencing with Data and Image Transfer
Option 3: End-to-End Encryption for Secure Calls
Option 4: Automatic Speech Recognition for Voicemail Transcription
Explanation: The T.120 protocol facilitates multipoint data conferencing, encompassing the transfer of data and images among multiple participants, enhancing collaborative multimedia services with features like shared workspaces and joint application usage.