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  2. Registered jack - Wikipedia

    en.wikipedia.org/wiki/Registered_jack

    Similar to RJ31X, with a continuity circuit. If the plug is disconnected from the jack, shorting bars allow the phone circuit to continue to the site phones. Only 4 conductors are used. RJ41S 8P8C, keyed For one data line, universal (fixed loop loss and programmed) RJ45S 8P8C, keyed For one data line, with programming resistor RJ48C 8P4C

  3. Modular connector - Wikipedia

    en.wikipedia.org/wiki/Modular_connector

    Although commonly referred to as RJ45 in the context of Ethernet and structured cabling, RJ45 originally referred to a specific wiring configuration of an 8P8C female connector. [ 14 ] [ 15 ] [ 16 ] The original telephone-system-standard RJ45 plug has a key that excludes insertion in an un-keyed 8P8C socket.

  4. Ethernet physical layer - Wikipedia

    en.wikipedia.org/wiki/Ethernet_physical_layer

    The physical-layer specifications of the Ethernet family of computer network standards are published by the Institute of Electrical and Electronics Engineers (IEEE), which defines the electrical or optical properties and the transfer speed of the physical connection between a device and the network or between network devices.

  5. Electrical connector - Wikipedia

    en.wikipedia.org/wiki/Electrical_connector

    Schematic symbols for ... connector is an electromechanical device used to create an electrical connection between parts of an electrical circuit, ... RJ45 and other ...

  6. Electronic symbol - Wikipedia

    en.wikipedia.org/wiki/Electronic_symbol

    An electronic symbol is a pictogram used to represent various electrical and electronic devices or functions, such as wires, batteries, resistors, and transistors, in a schematic diagram of an electrical or electronic circuit. These symbols are largely standardized internationally today, but may vary from country to country, or engineering ...

  7. Reference designator - Wikipedia

    en.wikipedia.org/wiki/Reference_designator

    Socket connector for another item not P or J, paired with the letter symbol for that item (XV for vacuum tube socket, XF for fuse holder, XA for printed circuit assembly connector, XU for integrated circuit connector, XDS for light socket, etc.) X, XTAL, Y: Crystal, ceramic resonator, powered oscillator: ZD: Zener diode: often changed to "D ...

  8. ANSI/TIA-568 - Wikipedia

    en.wikipedia.org/wiki/ANSI/TIA-568

    ANSI/TIA-568 is a technical standard for commercial building cabling for telecommunications products and services. The title of the standard is Commercial Building Telecommunications Cabling Standard and is published by the Telecommunications Industry Association (TIA), a body accredited by the American National Standards Institute (ANSI).

  9. Telephone jack and plug - Wikipedia

    en.wikipedia.org/wiki/Telephone_jack_and_plug

    The 5th plastic pin of the inserted plug disconnects a 1μF capacitor that otherwise closes the circuit of the telephone line when the plug is not inserted. This feature allows testing the line when the phone is not plugged in. [ 7 ] The usage of a capacitor is mostly obsolete and GTN-4 sockets produced later reuse the capacitor compartment for ...