i2600 hardwired serial fail-over cable

Hi Team,

Just wanted to get some clarification on the F5 i2600 hardwired serial cable, there is a RJ45 port on the F5 box and it is labled as a serial port. there is also blue cable came along with that, as per the documentation and all this blue should be used as fail-over cable between the F5 Box. Our F5 Box are mounted on two different racks and this cable is not enough to connect between them, as per the F5 document we can crimp the cable as per the color coding.

My question is can we use cat6 cable instead of cat5 cable for hardwired serial fail-over ? in all the documents of F5 mentioned only CAT5 but can it also work with CAT6 cable ?

Thank you