Question: What is the primary function of a Local EPC instance in isolated public safety networks using a Local EPC?
Option 1: To provide S1 connectivity to the macro EPC
Option 2: To include at least MME, SGW/PDN GW and HSS functionality for local operation
Option 3: To assign global IP addresses to UEs
Option 4: To act as a bridge between IOPS and non-IOPS networks
Explanation: In isolated public safety networks using a Local EPC, the primary function of a Local EPC instance is to include at least MME, SGW/PDN GW and HSS functionality for local operation. This allows the network to operate independently without S1 connectivity to the macro EPC.