Question: What type of gateway capability should the 5G system support for authorised UEs and non-3GPP devices in a PIN or CPN?
Option 1: Only eRG (enhanced RAN Gateway)
Option 2: Only PIN Element with Gateway Capability
Option 3: Either eRG or PIN Element with Gateway Capability, but not both
Option 4: At least one gateway, which can be either a PIN Element with Gateway Capability or an eRG
Explanation: According to the service requirements for the 5G system, it should support access to the 5G network and its services via at least one gateway, which can be either a PIN Element with Gateway Capability or an eRG (enhanced RAN Gateway), for authorised UEs and non-3GPP devices in a PIN or CPN.