Question: Under what condition may a User Equipment (UE) optionally include `voiceFallbackHO` in an RLF (Radio Link Failure) Report, as per 3GPP specifications?
Option 1: Always, for all types of handovers (HO) to improve network diagnostics.
Option 2: Upon request from the network, specifically after a successful HO from NR (New Radio) to E-UTRAN (Evolved Universal Terrestrial Radio Access Network) for voice fallback, following an RLF occurrence.
Option 3: Only when the UE is in a specific location (e.g., cell edge) and experiences an RLF during a voice call.
Option 4: Never; `voiceFallbackHO` is not a valid parameter for RLF Reports in any scenario.
Explanation: This option correctly reflects the condition under which a UE may optionally include `voiceFallbackHO` in an RLF Report. The inclusion is contingent upon a request from the network, specifically in scenarios where an RLF occurs shortly after a successful handover from NR to E-UTRAN for voice fallback purposes, aligning with efficient resource management and diagnostic practices in telecom networks.