1 Rack Unit Switch Confirmed by Brocade as a Qumran Broadcom switch with off-switch buffer memory. Brocade characterizes this as a deep buffer switch -- and that seems fair. There is a data sheet that claims switch fabric capacity of 1.08 Tb/s which exceeds the 800 Mb/s that Broadcom thinks the switch can handle. Brocade's number is simply the sum of the port bandwidths of the 48 + 6 ports. That is probably an overly simplistic way to characterize the switch.

Data sheet

There is a newer data sheet