The second-lowest grade of unshielded twisted-pair (UTP) cabling. Category 2 cabling was designed to support digital voice and data communication.
Category 2 cabling was capable of data transmissions up to 4 Mbps. It was used primarily in the installation of premise wiring for legacy Token Ring networks from IBM.
The electrical characteristics of category 2 cabling make it unsuitable for most networking purposes today, thus it is no longer installed as premise wiring.
Instead, all premise wiring today must use only category 3 cabling, category 4 cabling, or category 5 cabling, with category 5 or enhanced category 5 cabling preferred for all new installations.