![]() Outer insulation is typically polyvinyl chloride (PVC) or low smoke zero halogen (LS0H). Propagation speed relative to the speed of light The use of balanced lines helps preserve a high signal-to-noise ratio despite interference from both external sources and crosstalk from other pairs.Įlectrical characteristics for a commercially available Cat 5e UTP cable product HDBaseT (10.2 Gbit/s) is one such scheme. Various schemes exist for transporting both analog and digital video over the cable. The USOC/RJ-61 wiring standard may be used in multi-line telephone connections. In some cases, multiple signals can be carried on a single cable Cat 5 can carry two conventional telephone lines as well as 100BASE-TX in a single cable. Through the use of power over Ethernet (PoE), power can be carried over the cable in addition to Ethernet data.Ĭat 5 is also used to carry other signals such as telephony and video. 1000BASE-T and faster Ethernet connections require four wire pairs. ![]() ![]() 10BASE-T and 100BASE-TX Ethernet connections require two wire pairs. The cable standard prescribes performance parameters for frequencies up to 100 MHz and is suitable for 10BASE-T, 100BASE-TX (Fast Ethernet), 1000BASE-T (Gigabit Ethernet), and 2.5GBASE-T. The two schemes work equally well and may be mixed in an installation so long as the same scheme is used on both ends of each cable.Ĭategory 5 cable is used in structured cabling for computer networks such as Ethernet over twisted pair. The cable is terminated in either the T568A scheme or the T568B scheme. Category 5 cable is nearly always terminated with 8P8C modular connectors (often referred to incorrectly as RJ45 connectors ). ![]() TIA/EIA-568-B.1-2001 T568B Wiring PinĪ Cat 5e dual-port wall-mount assembly showing the two wiring schemes: A for T568A, B for T568B Category 5 patch cable in T568B wiringĬable types, connector types and cabling topologies are defined by ANSI/TIA-568. Both variants are backward compatible with Category 5 and 5e cables. Category 6A cable provides 500 MHz bandwidth. The improved performance of Cat 6 provides 250 MHz bandwidth. The Category 6 specification improves upon the Category 5e specification by extending frequency response and further reducing crosstalk. Category 5 was deprecated in 2001 and superseded by the Category 5e specification. The bandwidth (100 MHz) and physical construction are the same between the two, and most Cat 5 cables actually happen to meet Cat 5e specifications even though they are not certified as such. The Category 5e specification improves upon the Category 5 specification by further mitigating crosstalk. This has exposed the manufacturers and installers of such fake cable to legal liabilities. There has seen a rise in counterfeit cables, especially of the copper-clad aluminum (CCA) variety. The Category 5 specification requires conductors to be pure copper. The category and type of cable can be identified by the printing on the jacket. Permanent wiring used in structured cabling is solid. The stranded form is more flexible and withstands more bending without breaking. The cable is available in both stranded and solid conductor forms. These documents specify performance characteristics and test requirements for frequencies up to 100 MHz. Most Category 5 cables are unshielded, relying on the balanced line twisted pair design and differential signaling for noise suppression.Ĭategory 5 is currently defined in ISO/IEC 11801, IEC 61156 and EN 50173, though it was originally defined in ANSI/ TIA/EIA-568-A (with clarification in TSB-95). This cable is commonly connected using punch-down blocks and modular connectors. Cat 5 is also used to carry other signals such as telephone and video. The cable standard provides performance of up to 100 MHz and is suitable for most varieties of Ethernet over twisted pair up to 2.5GBASE-T but more commonly runs at 1000BASE-T (Gigabit Ethernet) speeds. Since 2001, the variant commonly in use is the Category 5e specification ( Cat 5e). Partially stripped cable showing its four twisted pairs (eight wires)Ĭategory 5 cable ( Cat 5) is a twisted pair cable for computer networks. Unshielded twisted pair communications cable
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