A USOC code identifying an eight-pin modular plug or jack used with unshielded twisted-pair cable. Officially, an RJ-45 connector is a telephone connector designed for voice-grade circuits. Only RJ-45-type connectors with better signal handling characteristics are called eight-pin connectors in most standards documents, though most people continue to use the RJ-45 name for all eight-pin connectors.
RJ-45 (Registered Jack 45) – standard for connecting UTP cabling. They are inexpensive and easy to install onto UTP cable. Used to connect devices transmitting data over local-area networks (LAN), especially Ethernets.
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