Dispatch Technologies and Systems Flashcards
7 cards from real PSD practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Dispatch Technologies and Systems flashcards as text
What is the function of an Uninterruptible Power Supply (UPS) in a dispatch center?
Answer: To provide backup power to critical equipment during an outage
A UPS provides immediate battery backup power to dispatch equipment during a power failure, bridging the gap until generators come online.
A dispatcher receives a 911 call where no voice is heard but the line remains open. What is this type of call commonly referred to as?
Answer: Silent call or open-line call
A silent or open-line call is one where the caller does not speak; dispatchers must attempt to make contact and may send units to the address if one is provided.
What is the purpose of the NCIC (National Crime Information Center) in dispatch operations?
Answer: Providing a national database of criminal records, stolen property, and missing persons
NCIC is an FBI-managed database that gives law enforcement and dispatchers access to records on wanted persons, stolen vehicles, and missing individuals.
In radio communications, what does 'simplex' operation mean?
Answer: Transmitting and receiving on the same frequency, one direction at a time
Simplex operation uses a single frequency where only one party can transmit at a time, commonly used for direct unit-to-unit communications.
What is the purpose of a 'radio repeater' in a public safety communications system?
Answer: To receive and re-transmit radio signals to extend coverage area
A repeater receives a radio signal on one frequency and simultaneously retransmits it on another at higher power, extending the communication range.
What does 'IP-based telephony' mean for NG911 systems?
Answer: Routing emergency calls over internet protocol networks rather than traditional circuit-switched lines
NG911 uses IP-based telephony (ESInet) to transport 911 calls over internet protocol networks, enabling multimedia and text communications.
What is 'logging recorder' equipment used for in a PSAP?
Answer: Recording all incoming calls and radio transmissions for documentation and review
A logging recorder captures audio from telephone lines and radio channels, providing records used for legal proceedings, training, and quality assurance.