It can be cascade via 4W(RJ45) port with cat 5e cable.
one side of the ethernet cable in 568B standard
(the PINs order is: white&orange,orange,white&green,blue,white&blue,green,white&brown,brown),
and another side in customized
(the PINs order is: white&orange,orange,blue,white&green,green,white&blue,white&brown,brown)