Building an OTS boils down to adding two things to an optical transport box: a virtual switch and the software hooks to receive commands from OpenFlow or some similar protocol. Infinera outfitted its gear accordingly, and ESnet provided a home-built SDN controller to talk to it.

via Optical SDN Gets a Test Run – Optical Networking – Telecom News Analysis – Light Reading.

The OTS used in the tests is nowhere near commercial viability, both sides tell Light Reading. The software doesn’t have operational niceties such as alarms or debugging tools, for instance.

OTS=Optical Transport Switch