So much of the conversation about open network centers on the RAN that it is easy to forget the equally innovative attempts that are being made, often led by start-ups, to open up the transport network. Indeed, a recent survey of almost 80 operators by Rethink Technology Research revealed that 35% believed an open network strategy would only deliver the full commercial benefits targeted, if it were planned from end to end; while a further 27% said an end to end approach would be “highly beneficial”. Complexity arises in the transport domain because it has so many elements, from RAN xHaul to metro and core switching and routing, to subsea cables. Many operators will use third party infrastructure in…