10Base-T A few years ago, the 10 BaseT cables used CAT3 cables, which are used for speeds up to 10Mbit, but today you will find mostly CAT5 cables, which are good for speeds up to 100 MHz or 100 Mbps, these cables are also used for 10 Mbps networks. Only two pairs of the UTP cable are used with the 10Base-T specification and the maximum length is 100 meters. Minimum length between nodes is 2.5 meters