Disclosed are examples of flow-directing elements, airfoil inserts, and assemblies thereof. In one embodiment, a method includes the act of receiving a plurality of subscriber metrics associated with a subscriber to an access network. The electronics are configured to vary the transmit power such that the transmit power does not exceed a maximum transmit power. At the MUXDEMUX, the optical signals are combined into a multiplexed stream which is output on the inputoutput 6.