XDR4 is “eXtended reach DR4”. "XDR" refers to 2km reach using single-mode fiber, and "4" implies there are 4 optical channels. Each of the 4 optical channels from a XDR4 module are carried on separate fibers, resulting in a total of 8 fibers (4 Tx and 4 Rx). Each optical channel operates at 100Gb/s.2019年11月30日にD***lより発表された
