Is it allowed to use a Y-splitter RJ-45 on a smart-x controller. Someone in our office did this and they said it worked. I was wondering if this was fully supported in the spec and if this is a bad practice to do.  I do not have any smart-x controllers on hand to test.  But, It seems like a smart and efficient way to expand a network without adding a powered switch as it will use one pair per split port. and limit speed to 100mbps max per port. Thoughts?  ... View more