base station
Any radio hardware containing a transmitter and receiver that is located in a fixed place.
cellular telephone
A low-power portable radio that communicates through an interconnected series of repeater stations called cells.
channel
An assigned frequency or frequencies that are used to carry voice and/or data communications.
chief complaint
The reason a patient called for help; also the patient’s response to questions such as “What’s wrong?” or “What happened?”
chief concern
The condition requiring the most urgent intervention as determined by the provider’s assessment of the patient; it is not always the same as the chief complaint.
closed-ended questions
Questions that can be answered in short or single-word responses.
communication
The transmission of information to another person verbally or through body language.
cultural imposition
When one person imposes his or her beliefs, values, and practices on another because they believe their ideals are superior.
dedicated line
A special telephone line used for specific point to point communications; also called a hotline.
documentation
The recorded portion of the EMT’s patient interaction, written or electronic, which becomes part of the patient’s permanent medical record.
duplex
The ability to transmit and receive simultaneously.
emotional intelligence
The ability to understand and manage one’s own emotions and appropriately respond to the emotions of others.
ethnocentrism
When a person considers his or her own cultural values as more important when interacting with people of a different culture.
Federal Communications Commission (FCC)
The federal agency with jurisdiction over interstate and international telephone, telegraph, and satellite communications, including those involving EMS activity.
handover
The transfer of pertinent patient information and responsibility for patient care; often includes physical movement of the patient and equipment; also known as handoff.
health information exchange (HIE)
A system that allows EMS providers to access relevant health data such as past medical problems, medications, allergies, and end of life decisions, avoid duplicate data entry, and view patient outcomes.
interoperable communications system
A communication system that uses voice over Internet protocol (VoIP) technology to allow multiple agencies to communicate and transmit data.
MED channels
VHF and UHF channels designated exclusively for EMS use by the Federal Communications Commission.
mental model
The picture an individual has in his or her head of “what’s going on” in a given situation.
mission-critical communications
Any communications where disruption will result in the failure of the mission at hand.
mobile data terminal (MDT)
A small computer terminal inside the ambulance that directly receives data from the dispatch center.
multiplex
The ability to transmit audio and data signals through the use of more than one communications channel.
noise
Anything that dampens or obscures the true meaning of a message.
open-ended questions
Questions for which the patient must provide detail to give an answer.