Practice Test Geeks(CED) Certified Emergency Dispatcher Practice Test
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Radio & Telecommunication Systems Flashcards

7 cards from real CED practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Radio & Telecommunication Systems flashcards as text

  1. A dispatcher attempts to reach a field unit but receives no response after three attempts. Per standard protocol, the dispatcher should:

    Answer: Notify a supervisor, attempt via alternate channels, and dispatch a welfare check unit

    When a unit does not respond to multiple contact attempts, dispatchers must escalate by notifying a supervisor, trying alternate channels, and dispatching a welfare check per protocol.

  2. Which of the following BEST describes the role of a 'patch' in radio communications?

    Answer: A connection linking two separate radio channels so users on each can communicate

    A radio patch bridges two different channels or systems, allowing users on separate frequencies to communicate with each other.

  3. What is the purpose of an Automatic Vehicle Location (AVL) system in emergency communications?

    Answer: To track the real-time geographic position of field units on a map display

    AVL uses GPS technology to display the real-time location of field units on a dispatch map, improving situational awareness and response coordination.

  4. When using phonetic alphabet in radio communications, how would a dispatcher correctly transmit the letters 'CAD'?

    Answer: Charlie-Alpha-Delta

    The NATO/APCO phonetic alphabet uses Charlie for C, Alpha for A, and Delta for D to ensure clarity when spelling letters over radio.

  5. A radio system experiences 'intermodulation interference.' This means:

    Answer: Two transmitters on nearby frequencies combine to create spurious signals that interfere with communications

    Intermodulation occurs when two or more strong signals mix in a receiver or transmitter and produce unwanted spurious frequencies that can disrupt communications.

  6. What is the primary purpose of recording all radio transmissions in a dispatch center?

    Answer: To provide documentation for legal proceedings, liability, quality assurance, and incident reconstruction

    Radio recordings serve multiple critical functions including legal evidence, liability protection, quality assurance reviews, and accurate incident reconstruction.

  7. In a Next Generation 911 (NG911) system, which of the following is a key capability that traditional 911 systems LACK?

    Answer: The ability to receive text messages, photos, and video from callers

    NG911 is designed to accept multimedia communications including texts, images, and video, which legacy circuit-switched 911 systems cannot process.