The QSFP-SR4 GBIC uses a BIT-SPRAY over 4 fiber pairs within a 12 fibre MPO connector. to equally spread BITs around all 4 fibers pairs.
While for the QSFP-BiDi, cisco talks about 2x 20Gbps transmit and receive channel to enable an aggregated 40-Gbps link over a single pair.
My question is: in the QSFP-BiDi, are bits also spread over this aggregate?
