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  2. Computer-aided dispatch - Wikipedia

    en.wikipedia.org/wiki/Computer-aided_dispatch

    The steady, red busy light indicates another dispatch position is transmitting on the channel. The flashing yellow call light indicates a field unit is talking on the channel. The call light usually blinks for several seconds after a transmission ends allowing a busy dispatcher to look up from a telephone call and determine which channel the ...

  3. Traffic light control and coordination - Wikipedia

    en.wikipedia.org/wiki/Traffic_light_control_and...

    The battery backups can operate the controller in emergency mode with the red light flashing or in fully functional mode. In 2004, California Energy Commission recommended to have local governments to convert their traffic lights to LEDs with battery backups. This would lower the energy consumption and enhance the safety at major intersections.

  4. The mystery of the flashing lights at the White House has ...

    www.aol.com/article/news/2017/05/31/the-mystery...

    The flashing red lights were spotted in President Trump's second floor residence on Sunday night, causing concern and sparking chatter on social media. The mystery of the flashing lights at the ...

  5. Optical communication - Wikipedia

    en.wikipedia.org/wiki/Optical_communication

    The light gun's lamp has a focused bright beam capable of emitting three different colors: red, white and green. These colors may be flashing or steady, and provide different instructions to aircraft in flight or on the ground (for example, "cleared to land" or "cleared for takeoff").

  6. Connection Machine - Wikipedia

    en.wikipedia.org/wiki/Connection_Machine

    The physical form of the CM-1, CM-2, and CM-200 chassis was a cube-of-cubes, referencing the machine's internal 12-dimensional hypercube network, with the red light-emitting diodes (LEDs), by default indicating the processor status, visible through the doors of each cube. By default, when a processor is executing an instruction, its LED is on.

  7. Linksys WRT54G series - Wikipedia

    en.wikipedia.org/wiki/Linksys_WRT54G_series

    The router can be used in other networks if the 3G cards are unlocked, because it is not the router, but the 3G cards that are locked to Vodafone. To use it in other networks it is necessary to change the settings of the APN, user and password manually to those of the new network. It can also be unlocked by flashing EM/EU version firmware.

  8. End-of-train device - Wikipedia

    en.wikipedia.org/wiki/End-of-train_device

    The end of train device (ETD), sometimes referred to as an EOT, flashing rear-end device (FRED) or sense and braking unit (SBU) is an electronic device mounted on the end of freight trains in replacement of a caboose.

  9. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!