FREMONT, Calif.--(BUSINESS WIRE)--Following a 2014 prototype demonstration event, the Optical Internetworking Forum (OIF) has approved an SDN Framework whitepaper that paves the way for implementation of SDN in Carrier Networks. The whitepaper, titled “Framework for Transport SDN: Components and APIs”, documents the SDN framework for multi-domain carrier networks. It identifies critical open APIs for Transport SDN based on synthesis of the SDN layered architecture and the ITU-T ASON functional