Question: In a Voice over LTE (VoLTE) scenario with inbound roaming, which architectural approach is typically utilized to facilitate lawful interception functions in the Visited Public Land Mobile Network (VPLMN)?
Option 1: Home Routed Architecture
Option 2: Local Breakout (LBO) with P-CSCF in VPLMN
Option 3: Centralized Routing Architecture
Option 4: Decoupled Routing Architecture
Explanation: Local Breakout (LBO) is utilized for VoLTE, an example of IMS roaming. For lawful interception of inbound roaming targets in VoLTE scenarios within the VPLMN, LBO with P-CSCF in VPLMN is used. This setup enables intercepting communications at the point where user traffic breaks out to the internet or another network, crucial for lawful interception in roaming scenarios.