What is Cat-5 Cable? (with pictures) - wisegeek Jul 12, 2019Cat-5 cable, sometimes called Ethernet cable, is short for Category 5 cable, a current industry standard for network and telephone wiring. This type of cable is unshielded wire containing four pairs of 24-gauge twisted copper pairs, terminating in an RJ-45 jack. If a wire is certified as Cat-5 and not just a twisted pair wire, it will have this designation printed on the outside. Amazon: cat 5 telephone wire Amazon: cat 5 telephone wire. Skip to main content. BUSHIBU Mini Wire Stripper 6 Pack Network Wire Stripper Punch Down Cutter for Network Wire Cable, RJ45/Cat5/CAT-6 Data Cable, Telephone Cable and Computer UTP Cable. 3.7 out of 5 stars 39.