Commonly referred to as Cat 6, is a cable standard for Gigabit Ethernet and other network protocols that is backward compatible with the Category 5/5e and Category 3 cable standards. Cat 6 features more stringent specifications for crosstalk and system noise. The cable standard provides performance of up to 250 MHz and is suitable for 10BASE-T / 100BASE-TX and 1000BASE-T / 1000BASE-TX (Gigabit Ethernet). It is expected to suit the 10GBASE-T (10Gigabit Ethernet) standard, although with limitations on length if unshielded Cat 6 cable is used. Category 6 cable can be identified by the printing on the side of the cable sheath.
The latest standard from the TIA for enhanced performance standards for twisted pair cable systems was defined in February 2008 in ANSI/TIA/EIA-568-B.2-10. Category 6a (or Augmented Category 6) operates at frequencies up to 500 MHz-twice that of Cat 6. Cat6a can support 10 Gbit/s applications (especially 10GBaseT) up to a maximum distance of 100 meters (330 ft). Improved specifications, particularly in the area of Alien Cross-talk (AXT).
(Cat 7), (ISO/IEC 11801:2002 category 7/class F), is a cable standard for Ethernet and other interconnect technologies that can be made to be backwards compatible with traditional Cat 5 and Cat 6 Ethernet cable. Cat 7 features even more strict specifications for crosstalk and system noise than Cat 6. To achieve this, shielding has been added for individual wire pairs and the cable as a whole. The Cat 7 cable standard has been created to allow 10 Gigabit Ethernet over 100 m of copper cabling (also, 10-Gbit/s Ethernet now is typically run on Cat 6a). The cable contains four twisted copper wire pairs, just like the earlier standards. Cat 7 can be terminated either with 8P8C compatible GG45 electrical connectors which incorporate the 8P8C standard or with TERA connectors. When combined with GG45 or TERA connectors, Cat 7 cable is rated for transmission frequencies of up to 600 MHz.
Category 7a (or Augmented Category 7) operates at frequencies up to 1000 MHz, suitable for multiple applications in a single cable including 40 Gigabit Ethernet, 100 Gigabit Ethernet, and CATV (862 MHz). Simulation results have shown that 40 Gigabit Ethernet is possible at 50 meters and 100 Gigabit Ethernet is possible at 15 meters. Mohsen Kavehrad and researchers at Pennsylvania State University believe that either 32 nm or 22 nm circuits will allow for 100 Gigabit Ethernet at 100 meters.
CAT8 cable represents the current evolutionary cutting edge of twisted-pair copper data communications transmission technology that originated back with CAT5 cable. Indeed all of these cables use four twisted pairs in their construction. Of the older cable grades, CAT5 can take a maximum bandwidth of 100MHz, CAT6 is capable of 400MHz and CAT7 625MHz. CAT8 is capable of carrying a bandwidth of up to 1400MHz, so it easily meets and exceeds the IEC 61156-7 standard that sets the benchmark for multimedia cables at 1200MHz. MD Electrical Ltd also provide and install Fibre Optical Cabling, Telephone Cabling and Coaxial Cabling systems.