lan cable

A ρá†ch cable, ρá†ch cord or ρá†ch lead is an electrical or optical cable used to connect ("ρá†ch 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 ρá†ch cords.
ρá†ch cords are usually produced in many different colors so as to be easily distinguishable from each other. Types of ρá†ch cords include microphone cables, fiber optic spectroscopy cables, headphone extension cables, XLR connector, Tiny Telephone (TT) connector, RCA connector and ¼" TRS phone connector cables (as well as modular Ethernet cables), and thicker, hose-like cords (snake cable) used to carry video or amplified signals. However, ρá†ch cords typically refer only to short cords used with ρá†ch panels.
The term "ρá†ch" came from early use in telephony and radio studios, where extra equipment kept on standby could be temporarily substituted for failed devices. This reconnection was done via ρá†ch cords and ρá†ch panels, like the jack fields of cord-type telephone switchboards. Furthermore, patching could also create temporary atypical connections between devices for unusual needs. Analog music synthesizers typically use ρá†ch cables to interconnect functional sections, such as oscillators, filters, etc.

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