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Radio Communication Protocols Flashcards

7 cards from real 911 Operator Test 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 Communication Protocols flashcards as text

  1. During a major incident, a dispatcher is told to 'go to talk-around.' What does this mean?

    Answer: Switch to direct unit-to-unit radio communication without using the repeater

    Talk-around (also called direct or simplex mode) bypasses the repeater system and lets units communicate directly with each other on a shared frequency.

  2. What is the appropriate response when a unit fails to respond to three consecutive radio calls from dispatch?

    Answer: Initiate a welfare check per agency protocol

    Failure to respond to repeated calls is a safety concern requiring a welfare check, as the officer may be in danger or incapacitated.

  3. What does the phrase 'negative contact' mean when transmitted by a field unit?

    Answer: The unit was unable to locate or make contact with the subject or location

    Negative contact means the officer arrived at the scene or attempted to reach a subject but was unable to locate them or make contact.

  4. What is the primary reason dispatchers should avoid using 'ten-codes' in NIMS-compliant communications?

    Answer: Ten-codes vary by agency and can cause confusion during multi-agency responses

    NIMS promotes plain language because ten-codes differ between agencies, creating dangerous miscommunications when multiple agencies work together.

  5. A unit transmits 'Show me Code 4, no further assistance needed.' What is the dispatcher's responsibility at this point?

    Answer: Acknowledge the transmission and update the unit's status in CAD

    The dispatcher should acknowledge the Code 4 transmission and update the Computer-Aided Dispatch system to reflect the unit's current status.

  6. Which of the following is a best practice for authenticating an unusual or suspicious radio request?

    Answer: Request the caller identify by unit number, name, and supervisor if needed

    Verifying identity by requesting unit number and name helps prevent unauthorized persons from impersonating officers and directing false dispatches.

  7. What does the term 'squelch' refer to on a radio?

    Answer: A circuit that mutes the receiver when no signal is present to eliminate static

    Squelch is an electronic circuit that silences the radio's audio output when no signal is detected, preventing continuous background static.