LCN Diameter offers 3GPP APIs (Gx, Rx, Ro etc) as APIs for the developers. The toolkit also includes a Diameter base implementation, so OEM customers can build complete Diameter clients (PCEF, AF,..) or servers (PCRF, OCS,..) using the libraries. APIs provide a high-level programming interface and have support for event-driven, mutli-threaded programming.
LCN also offers the Diameter switch separately. Apart from implementing base Diameter, this also provides load balancing and DRA functionality.