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A patch cable, patch cord or patch lead is an electrical or fiber-optic cable used to connect ("patch in") one electronic or optical device to another for signal routing. Devices of different types (e.g., a switch connected to a computer, or a switch to a router ) are connected with patch cords.
Rear view of a patch panel with BNC jacks in close proximity. [ 15 ] A BNC inserter/remover tool , also called a BNC tool , BNC extraction tool , BNC wrench , or BNC apple corer , is a tool used to insert or remove BNC connectors in high density or hard-to-reach locations, such as densely wired patch panels in broadcast facilities like central ...
A fiber-optic patch cord is constructed from a core with a high refractive index, surrounded by a coating with a low refractive index, that is strengthened by aramid yarns and surrounded by a protective jacket. Transparency of the core permits transmission of optic signals with little loss over great distances.
However, the assembly and polishing operations involved can be performed in the field, for example, to terminate long runs at a patch panel. Optical fiber connectors are used in telephone exchanges, for customer premises wiring, and in outside plant applications to connect equipment and fiber-optic cables, or to cross-connect cables.
10BASE2 coax cables have a maximum length of 185 metres (607 ft). The maximum practical number of nodes that can be connected to a 10BASE2 segment is limited to 30 [ 4 ] with a minimum distance of 0.5 metres (20 in) between devices. [ 5 ]
Zip-cord style jackets, including those that contain Aramid yarn as the strength member, can be slipped over multiple fiber strands coming out of a loose buffer cable to convert it to a complete set of single-fiber cables that can be directly attached to optical connectors. A plastic boot is normally used for strain relief and protection from ...
For example, the common patch cables used for Ethernet (and the similar cords used for telephones) typically have male modular plugs on both ends, to connect to jacks on equipment or mounted in walls. Common 5.5×2.5 mm coaxial power connectors.
Flat no-leads packages such as quad-flat no-leads (QFN) and dual-flat no-leads (DFN) physically and electrically connect integrated circuits to printed circuit boards. Flat no-leads, also known as micro leadframe (MLF) and SON (small-outline no leads), is a surface-mount technology , one of several package technologies that connect ICs to the ...