I would be surprised if the answer to this question isn't yes, but I'll double check anyway. Having a new cab put in with fibre between it and the server room, which will be OM4. Will also use OM4 patch cables. We have 2 spare SFP modules, couple of years old, they work fine with our OM3 fibre run, will it be fine with OM4? Is the grade of fibre irrelevant in this case?