What is IBCF (Interconnection border control function)?

Interconnection border control function intended to work with interconnection among two service provider domains. Interconnection Border control Function (IBCF) goes about as a border controller for interworking with IP Multimedia Subsystem network and manages problems and security that happen while interworking with different organizations. The principal components of IBCF are Session filtering, Topology and infrastructure hiding, Protocol conversion and routing, Billing, Media Relay and IBCF interworking.