Question: During a Bearer Modification Event in a telecom network, what information does the `EPS Bearer QoS` parameter carry if the default bearer modification is **unsuccessful**?
Option 1: The currently applied EPS Bearer QoS for the modified bearer
Option 2: The subscribed APN-AMBR for the user's default bearer
Option 3: The requested EPS Bearer QoS for the default bearer modification
Option 4: The new RAT type after a handover between different accesses
Explanation: When a default bearer modification is unsuccessful, the `EPS Bearer QoS` parameter specifically carries the **requested** EPS Bearer QoS for that modification attempt. This distinction is crucial for lawful interception and network management, as it provides insight into what was attempted versus what is currently in effect. Understanding this nuance is vital for managing Quality of Service (QoS) expectations in telecom networks, especially during bearer modifications or handovers.