911 Operator Test Radio Communication Protocols 4 — Questions and Answers
Question 1: What does 'APCO' stand for in the context of public safety communications?
- Advanced Police Communications Organization
- Association of Public-Safety Communications Officials (Correct answer)
- American Protocol for Communications Operations
- Authorized Public Communications Officers
Correct answer: Association of Public-Safety Communications Officials
APCO International (Association of Public-Safety Communications Officials) is the organization that develops standards and training for public safety communications professionals.
Question 2: Which phonetic alphabet letter is used to represent 'W' in the NATO standard?
- Walter
- Whiskey (Correct answer)
- William
- Warrior
Correct answer: Whiskey
Whiskey is the NATO phonetic designation for 'W', used universally in public safety and military radio communications.
Question 3: When a supervisor transmits 'Secure the channel,' what action is typically required?
- Encrypt all subsequent transmissions
- Cease non-emergency radio traffic immediately (Correct answer)
- Switch to a backup radio system
- Log all transmissions from this point forward
Correct answer: Cease non-emergency radio traffic immediately
Securing the channel means stopping all non-essential transmissions, typically to allow priority or emergency traffic to dominate the channel.
Question 4: What is a 'repeater' in public safety radio communication?
- A dispatcher who relays messages verbally to field units
- A device that receives a weak signal and retransmits it at higher power to extend range (Correct answer)
- A backup radio system activated during outages
- A unit assigned solely to monitor radio traffic
Correct answer: A device that receives a weak signal and retransmits it at higher power to extend range
A repeater receives transmissions on one frequency and simultaneously retransmits them on another at greater power, greatly extending communication range.
Question 5: A dispatcher hears two units transmitting simultaneously causing a 'double' or 'co-channel interference.' What is the best immediate action?
- Ask one unit to retransmit and request the other to wait (Correct answer)
- Ignore it and wait for one unit to finish
- Switch all units to an alternate channel permanently
- Request both units reduce transmitter power
Correct answer: Ask one unit to retransmit and request the other to wait
The dispatcher should prompt one unit to retransmit while the other stands by, resolving the conflict and ensuring both messages are received.
Question 6: In ICS radio communications, what is the role of the 'Communications Unit Leader' (COML)?
- Monitor civilian scanner traffic during incidents
- Plan, set up, and manage the communications system for an incident (Correct answer)
- Operate the primary dispatch console for the jurisdiction
- Handle all media and public information transmissions
Correct answer: Plan, set up, and manage the communications system for an incident
The COML is responsible for planning and managing the tactical communications system for an incident, including frequency assignments and equipment.
Question 7: What does the radio term 'ETA' stand for?
- Emergency Tactical Alert
- Estimated Time of Arrival (Correct answer)
- Emergency Transmission Authorization
- End of Traffic Acknowledgment
Correct answer: Estimated Time of Arrival
ETA stands for Estimated Time of Arrival, commonly used by dispatchers and field units to communicate expected arrival time at a location.
911 Operator Test Radio Communication Protocols 4
What does 'APCO' stand for in the context of public safety communications?