Category 6 cable commonly referred to as cat 6 is a cable standard for gigabit ethernet and other network protocols that are backward compatible with the category 55e and category 3 cable standards compared with cat 5 and cat 5e cat 6 features more stringent specifications for crosstalk and system noise the cable standard provides performance of up to 250mhz specification 025 mtr blue utp unshielded twisted pair cat 6 moulded 24awg x 4p patch type cm ul cmh e164469 f3 isoiec 11801