1 pointOften it's not the cost of the cable, but the cost or difficulty of running it. That was why, when I did new cable installations for my employer, I always ran 25-50% more runs than the projected need. (And, when they recently switched from a legacy phone system to IP phones, it still wasn't enough. But they only had to add a dozen or so new runs, so not bad for a 20-year-old install with close to 500 runs ;).) Terminating existing cable is inexpensive and trivial. I'd terminate it, try it, and see if it worked. If not: Then replace it with Cat5E or Cat6.
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