Most cable manufacturers are describing quad cable as "alarm" cable. They don't even mention the word "telephone" anywhere on the spec sheet.

10baseT predates Cat 3 by a couple of years at least (IIRC, 10baseT was available in 1988/89, the first mention of category 3 cable on USENET was in 1992), so the earliest 10baseT networks were running on standard multipair telephone cable. 10baseT was designed to work with the then-common twisted pair telephone cable, in fact.

The manual for my first 10baseT card simply specified to use cable with a minimum of 2 twists per foot.