Question: What triggers the measurement of an Attempted UE Originating Voice Call in a Telecommunication Network?
Option 1: Receipt of a 'Release' message by the MSC-S indicating call termination
Option 2: Successful establishment of a voice call between two UEs
Option 3: Sending of a 'Setup' message with 'Information transfer capability' set to SMS from Calling Party
Option 4: Receipt by the MSC-S of a 'Setup' message with 'Information transfer capability’ set to speech or alternate speech/facsimile group 3 - starting with speech in the Bearer Capability IE
Explanation: This is correct because the measurement is triggered by the MSC-S receiving a 'Setup' message specifically indicating a voice call setup (speech or alternate speech/facsimile group 3 - starting with speech), aligning with real-world telecom scenarios where call attempts are counted from the moment a user initiates a call setup process for a voice communication.