Question: What is the primary purpose of the 'CTM Text Transport' package (PackageName: CTM Text Transport, PackageID: threegctm) in mobile networks?
Option 1: To enable robust real-time text conversation through a voice channel.
Option 2: To enhance voice quality over mobile networks by reducing background noise.
Option 3: To facilitate video streaming services with lower latency.
Option 4: To provide location-based services for emergency calls.
Explanation: The CTM Text Transport package is specifically designed to enable robust real-time text conversation through a voice channel, primarily for communication over mobile networks, utilizing the CTM Cellular Text Telephone Modem for T.140 text conversation streams.