Question: What type of identifier is used by the User Equipment (UE) to request access transfer of a media path in CS to PS Single Radio Voice Call Continuity?
Option 1: IMSI (International Mobile Subscriber Identity)
Option 2: SIP URI (Session Initiation Protocol Uniform Resource Identifier)
Option 3: MSISDN (Mobile Station International ISDN Number)
Option 4: IMEI (International Mobile Equipment Identity)
Explanation: A Session Transfer Identifier for CS to PS Single Radio Voice Call Continuity (STI-rSR) is a SIP URI, which is used by the UE to request access transfer of a media path. This identifier plays a crucial role in ensuring seamless call continuity during handovers between circuit-switched and packet-switched networks.