I have two Cat 5 cables pre-installed in the walls. I need to connect two rooms, in which each room has its own set of in-wall Cat 5 cables and a slots. Does it work to use a Cat 6 cable to connect the two rooms (using the slot in each room)?
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I dont see any problem using a CAT6 cable to connect the two rooms. – user36472 Nov 12 '18 at 8:15
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The point is the rooms are pre-equipped with CAT5. So basically, CAT6 will act as a connector between two CAT5s. Is that OK? – HussainBiedouh Nov 12 '18 at 8:43
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2As long as the maximum length of the cable doesn't exceed the recommended 90 meters i can't see any problem doing so. – user36472 Nov 12 '18 at 8:48
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Actually, you are supposed to have the permanent cable in the wall, which will be solid-core cable, then you are allow one stranded cable on each end to do the connections to the equipment on each end. You do not have a cable connecting two horizontal cables (wall-plate-to-wall-plate) like it sounds like you want to do. Splices, taps, couplers, etc., are not allowed in a cable run. – Ron Maupin♦ Nov 12 '18 at 15:28
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1I'd be surprised if the ports in the rooms don't end up in panel in a closet somewhere in your basement, where you only a need few inches of cable to go between ports in the panel. Even better if you put a switch there. – Joel Coehoorn Nov 12 '18 at 18:01
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Yes. Cat-6 cable requirements are a superset of Cat-5e - there's no problem.
Note that a length of Cat-6 doesn't make the full path Cat-6. ;-)
A short answer is absolutely; CAT6 is backwards compatible to CAT5.
The full answer; since CAT ANSI ratings for cables describe the quality of the wires and speed/attenuation rating of the cable, and NOT the connectors and pin-out of the cables, "Not necessarily".
It sounds like you are using cables with RJ-45 connectors. Usually people refer to these cables as "Ethernet" cables, although Ethernet is a layer 2 networking protocol and not a type of cable. I'm going to infer that you have networking jacks in each room with a punchdown block for these RJ-45 connectors, and that they are 8p-8c. Assuming all this, because your question was about the rating of the wires within the cables, and not in regards to the pin-out on the ends of the cables, the correct answer is "Maybe!". For example, if the jacks in the wall are pinned out in in a non-TIA configuration (neither 568A or 568B), you will not be getting a usable signal over the connection. While an unlikely scenario it is certainly possible; it is worth understanding the CAT rating of the cable is not the only relevant factor in determining your cabling success or failure.
