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Category 5 cable
Category 5 cable (Cat 5) is a twisted pair cable for computer networks. Since 2001, the variant commonly in use is the Category 5e specification (Cat 5e). 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. Cat 5 is also used to carry other signals such as telephone and video.
This cable is commonly connected using punch-down blocks and modular connectors. Most Category 5 cables are unshielded, relying on the balanced line twisted pair design and differential signaling for noise suppression.
Category 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). These documents specify performance characteristics and test requirements for frequencies up to 100 MHz.
The cable is available in both stranded and solid conductor forms. The stranded form is more flexible and withstands more bending without breaking. Patch cables are stranded. Permanent wiring used in structured cabling is solid. The category and type of cable can be identified by the printing on the jacket.
The Category 5 specification requires conductors to be pure copper. There has been a rise in counterfeit cables, especially of the copper-clad aluminum (CCA) variety. This has exposed the manufacturers and installers of such fake cable to legal liabilities.
The Category 5e specification improves upon the Category 5 specification by further mitigating crosstalk. 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. Category 5 was deprecated in 2001 and superseded by the Category 5e specification.
The Category 6 specification improves upon the Category 5e specification by extending frequency response and further reducing crosstalk. The improved performance of Cat 6 provides 250 MHz bandwidth. Category 6A cable provides 500 MHz bandwidth. Both variants are backward compatible with Category 5 and 5e cables.
Cable types, connector types and cabling topologies are defined by ANSI/TIA-568. Category 5 cable is nearly always terminated with 8P8C modular connectors (often referred to incorrectly as RJ45 connectors). The cable is terminated in either the T568A scheme or the T568B scheme. 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.
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Category 5 cable AI simulator
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Category 5 cable
Category 5 cable (Cat 5) is a twisted pair cable for computer networks. Since 2001, the variant commonly in use is the Category 5e specification (Cat 5e). 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. Cat 5 is also used to carry other signals such as telephone and video.
This cable is commonly connected using punch-down blocks and modular connectors. Most Category 5 cables are unshielded, relying on the balanced line twisted pair design and differential signaling for noise suppression.
Category 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). These documents specify performance characteristics and test requirements for frequencies up to 100 MHz.
The cable is available in both stranded and solid conductor forms. The stranded form is more flexible and withstands more bending without breaking. Patch cables are stranded. Permanent wiring used in structured cabling is solid. The category and type of cable can be identified by the printing on the jacket.
The Category 5 specification requires conductors to be pure copper. There has been a rise in counterfeit cables, especially of the copper-clad aluminum (CCA) variety. This has exposed the manufacturers and installers of such fake cable to legal liabilities.
The Category 5e specification improves upon the Category 5 specification by further mitigating crosstalk. 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. Category 5 was deprecated in 2001 and superseded by the Category 5e specification.
The Category 6 specification improves upon the Category 5e specification by extending frequency response and further reducing crosstalk. The improved performance of Cat 6 provides 250 MHz bandwidth. Category 6A cable provides 500 MHz bandwidth. Both variants are backward compatible with Category 5 and 5e cables.
Cable types, connector types and cabling topologies are defined by ANSI/TIA-568. Category 5 cable is nearly always terminated with 8P8C modular connectors (often referred to incorrectly as RJ45 connectors). The cable is terminated in either the T568A scheme or the T568B scheme. 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.