Flashcards in Chapter 3 Deck (64)
What are the two divisions of FD communications?
internal and external
What is external communication?
requests from the public for both emergency and nonemergency assistance
What is internal communication?
consists primarily of radio transmissions between units and individuals during emergency operations
What is the Public Safety Answering Point (PSAP)?
any location or facility at which 911 calls are answered either by direct calling, rerouting, or diversion
What are the two broad categories of telecommunications systems?
Emergency Service Specific Telecommunications Center and PSAP
What is the Emergency Service Specific Telecommunications Center?
this center separates telecommunications or dispatch centers that the FD, emergency medical services, or law enforcement agencies operate
What is NFPA 1221
NFPA 1221: Standard for the Installation, Maintenance, and Use of Emergency Services Communications Systems
What information should be gathered when the public contacts the FD directly?
the type of emergency, the location of the emergency, the number and location of people involved, the name of location of caller, the callback number, and the street/building name/neighborhood/area of city/nearby landmarks
What is an Automatic Location Identification (ALI)?
an enhanced 911 feature that displays address of party calling. This feature also routes calls to the appropriate PSAP
What are different examples of Public Alerting Systems?
Radio, wired telegraph circuit box, telephone fire alarm box, and radio fire alarm box
When referring to public alerting systems, where is an emergency most likely to be reported from FD personnel or other government workers?
What public alert systems are equipped with a telephone for direct voice contact with the telecommunications center?
Telephone fire alarm box
What public alert system contains an independent radio transmitter with a battery power supply?
Radio fire alarm box
Who is the contact person for nonemergency or complaint calls?
Public Information Officer (PIO)
What does dispatch begin with?
some form of alert to the stations, apparatus, or individuals
What are the 3 forms of alarm notification?
Visual (station lights)
Audible (vocal alarm, station bell, sirens, etc)
Electronic (radio with tone alert, computer terminal screen with alarm or line printer, scrolling message board, etc)
How do volunteer FD's alert members of an emergency? (usually)
What type of communications are most internal communications?
What are base station radios?
fixed, nonmotile radio at a central location
What must portable radios be that are used in hazardous atmospheres?
What is intrinsically safe equipment?
equipment designed and approved for use in flammable atmospheres that is incapable of releasing sufficient electrical energy to cause the ignition of a flammable atmospheric mixture
What are the two types of carrier waves?
AM (amplitude modulation) and FM (frequency modulation)
What are AM waves sometimes referred to?
medium wave signals
What do AM waves do?
they vary the strength of the signal to reflect the speaker's voice
What do FM waves do?
they allow for the signal to change based of the microphone audio; the signal is filtered to remove any frequencies over the human voice without making changes to the signal
Which wave signal does a better job of cancelling naturally occurring noice? AM or FM
What refers to the straight line travel of radio signals between the antenna connected to the transmitter and the antenna connected to the receiver?
What is a simplex system?
a simplex system is when one radio transmits and another receives; a two-party system operating on one frequency because only one radio can transmit at a time
How is the problem of barriers solved in direct communication?