Question: What is a key aspect of the single numbering scheme supported by telecommunication standards for Mobile Terminating (MT) calls?
Option 1: Allowing multiple MSISDNs to be associated with a single User Equipment (UE) for different bearer types.
Option 2: Routing MT calls of various bearer types (e.g., voice, fax, data) to a single Mobile Subscriber Integrated Services Digital Network Number (MSISDN).
Option 3: Requiring a separate MSISDN for each type of bearer service (voice, fax, data) to facilitate call routing.
Option 4: Mandating the use of ISDN for all transit networks to ensure bearer information availability.
Explanation: The single numbering scheme's key aspect is its ability to route incoming calls of different bearer types (voice, fax, and data) to a single MSISDN, enhancing convenience and simplicity by allowing one phone number for multiple services.