I see these for sale on www.newegg.com (tooless keystone jacks). How exactly to they work? The how-tos I've been reading outline the use of keystone jacks that require a punchdown tool. Does the "tooless" jack operate like a female-female plug of some kind then? Will the cables I make that come from the router need to be crossed over? Please help if you can shed any light on this. Thanks.