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  2. Westlock Interlocking - Wikipedia

    en.wikipedia.org/wiki/Westlock_Interlocking

    WESTLOCK Interlocking is a Computer-based interlocking (CBI) product now sold and maintained by Siemens Mobility Limited, following their purchase of Westinghouse Rail Systems. Westlock builds on many of the features that made SSI popular in the United Kingdom .

  3. Interlocking - Wikipedia

    en.wikipedia.org/wiki/Interlocking

    Interlocking is a safety measure designed to prevent signals and points/switches from being changed in an improper sequence. For example, interlocking would prevent a signal from being changed to indicate a diverging route, unless the corresponding points/switches had been changed first.

  4. List of telephone switches - Wikipedia

    en.wikipedia.org/wiki/List_of_telephone_switches

    EMS-1 (The ITEC Electronic Modular Switch is an electronic direct control switching system. The modules are combined to form a complete switch or any of the modules can be added to your present Step-by-Step Systems.) EMS-2 (The EMS-2 RURAL SWITCH is a stored program control analog switch designed to be cost-effective in small exchanges.

  5. Union Switch & Signal - Wikipedia

    en.wikipedia.org/wiki/Union_Switch_&_Signal

    Union Switch & Signal (commonly referred to as US&S) was an American company based in Pittsburgh, Pennsylvania, which focused on railway signaling equipment, systems and services. The company was acquired by Ansaldo STS (from 2015, Hitachi Rail STS ) in 1988, [ 1 ] operating as a wholly-owned company until January 2009, when US&S was renamed ...

  6. Computer-based interlocking - Wikipedia

    en.wikipedia.org/wiki/Computer-based_interlocking

    Westlock; Germany - Alister CBI from Funkwerk IT [1] Interface between different brands. When interfacing different brands of CBI equipment, it may be necessary to ...

  7. List of networking hardware vendors - Wikipedia

    en.wikipedia.org/wiki/List_of_Networking...

    Typically, this includes routers, switches, access points, network interface cards and other related hardware. This is a list of notable vendors who produce network hardware. This is a list of notable vendors who produce network hardware.

  8. Hall Signal Company - Wikipedia

    en.wikipedia.org/wiki/Hall_Signal_Company

    Disc signal manufactured by Hall Signal Company A 1916 advertisement for a Hall wigwag grade crossing signal. The Hall Signal Company was an American manufacturer of railway signaling equipment in the 19th and 20th centuries.

  9. Solid State Interlocking - Wikipedia

    en.wikipedia.org/wiki/Solid_State_Interlocking

    SSI utilises a 2-out-of-3 redundancy architecture, whereby all safety-critical functions are performed in three separate processing lanes and the results voted upon. An SSI interlocking cubicle comprises three Interlocking Processors or Multi Processor Modules (MPMs), two Panel Processors and a Diagnostics Processor (DMPM).

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