Abstract-We discuss hybrid WDM/SDM delivery of mobile fronthaul in PONs, employing SDN-enabled BVTs based on adaptive multicarrier modulation. First, we present a generic scheme for the WDM/SDM fronthaul delivery and discuss the limits of the solution. Also, the paper explains the programmability options of the different optical elements presented. Finally, a set of preliminary experiments is reported and the most relevant results are highlighted.