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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. Wiring diagram - Wikipedia

    en.wikipedia.org/wiki/Wiring_diagram

    There are symbols that show the location of smoke detectors, the doorbell chime, and thermostat. On large projects symbols may be numbered to show, for example, the panel board and circuit to which the device connects, and also to identify which of several types of fixture are to be installed at that location.

  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. Reference designator - Wikipedia

    en.wikipedia.org/wiki/Reference_designator

    A reference designator unambiguously identifies the location of a component within an electrical schematic or on a printed circuit board.The reference designator usually consists of one or two letters followed by a number, e.g. C3, D1, R4, U15.

  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. File:Electrical symbols library.svg - Wikipedia

    en.wikipedia.org/wiki/File:Electrical_symbols...

    Added diode symbols with usual continuous line in addition to the already contained vitiligoed ones: 10:22, 7 August 2014: 1,276 × 992 (297 KB) Xorx: Reverted to version as of 12:08, 14 February 2014. Trial to improve svg validator dit not work.

  8. Ethernet over twisted pair - Wikipedia

    en.wikipedia.org/wiki/Ethernet_over_twisted_pair

    Symbol rate per lane (MBd) Bandwidth (MHz) [C] Max distance (m) Cable [D] Cable rating (MHz) Intended usage StarLAN-1 1BASE5: 802.3e-1987: obsolete 1 2 1 1 PE 1 1 250 voice grade ~12 LAN: StarLAN-10 802.3e-1988: obsolete 10 2 1 1 PE 10 10 ~100 voice grade ~12 LAN LattisNet: pre 802.3i-1990: obsolete 10 2 1 1 PE 10 10 100 voice grade ~12 LAN ...

  9. Circuit diagram - Wikipedia

    en.wikipedia.org/wiki/Circuit_diagram

    On a circuit diagram, the symbols for components are labelled with a descriptor or reference designator matching that on the list of parts. For example, C1 is the first capacitor, L1 is the first inductor, Q1 is the first transistor, and R1 is the first resistor. Often the value or type designation of the component is given on the diagram ...