ENP Exam UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
What must all public safety Land Mobile Radio (LMR) systems be licensed by? - CORRECT
ANSWER The FCC in the US and ISED in Canada.
What is the effect of lower frequencies in radio communication? - CORRECT ANSWER They
travel farther but need more spectrum.
What is the FCC's 2013 Narrowbanding mandate? - CORRECT ANSWER It shrank channel
width from 25 kHz to 12.5 kHz below 512 MHz to free up spectrum.
What are the ITU frequency classifications for VHF? - CORRECT ANSWER VHF low band
(39-72 MHz) and VHF high band (150-170 MHz).
What is the typical range of UHF radios? - CORRECT ANSWER Approximately 25 miles.
What is trunked radio? - CORRECT ANSWER A system where users share a pool of channels
via computer-assigned 'talk groups' instead of dedicated channels.
What does P25 stand for in radio communications? - CORRECT ANSWER APCO Project 25,
the public-safety digital radio standard.
What is the difference between trunked and conventional radios? - CORRECT ANSWER
Trunked radios switch channels via software, while conventional radios require manual
switching.
What is a simplex mode in radio communication? - CORRECT ANSWER Radios talk directly
to each other on one frequency without infrastructure.
What is the purpose of a repeater system? - CORRECT ANSWER To extend the range of
communication by retransmitting signals from an elevated tower.
,What does VoIP stand for? - CORRECT ANSWER Voice over Internet Protocol.
What is the role of a Selective Router in E9-1-1 systems? - CORRECT ANSWER To centralize
call routing intelligence and send calls to the correct PSAP.
What is Enhanced 9-1-1 (E9-1-1)? - CORRECT ANSWER A system defined by the addition of
Selective Routing.
What does ANI stand for in the context of 9-1-1 calls? - CORRECT ANSWER Automatic
Number Identification.
What is the first 9-1-1 call date and location? - CORRECT ANSWER February 16, 1968, in
Haleyville, Alabama.
What is the difference between Basic 9-1-1 and Enhanced 9-1-1? - CORRECT ANSWER
Basic 9-1-1 has no caller ID and no Selective Routing, while Enhanced 9-1-1 includes
Selective Routing.
What is the function of the Emergency Service Number (ESN)? - CORRECT ANSWER To
identify the appropriate emergency service for a given area.
What is the significance of the MSAG in E9-1-1 systems? - CORRECT ANSWER It is
required for the translation of address to ESN.
What is the purpose of the VoIP Positioning Center (VPC)? - CORRECT ANSWER To store
the registered address for VoIP calls and provide location/callback data.
What does the term 'nomadic' refer to in VoIP terminals? - CORRECT ANSWER Terminals
that must be re-registered when moved.
What is the function of the control channel in trunked radio systems? - CORRECT ANSWER
To manage the assignment of channels to users.
,What technology evolution does CMRS represent? - CORRECT ANSWER Wireless carriers
connected to the Public Switched Telephone Network (PSTN).
What is the typical power output for mobile radios compared to portable radios? - CORRECT
ANSWER Mobiles transmit at up to 100W, while portables transmit at about 5W.
What is the significance of the term 'Handoff' in mobile communications? - CORRECT ANSWER
It refers to seamless cell-to-cell switching.
What does CAMA stand for in the context of 9-1-1 systems? - CORRECT ANSWER
Centralized Automatic Message Accounting.
What is the difference between analog and digital transmission? - CORRECT ANSWER
Analog carries the voice waveform directly, while digital converts voice to 1s and 0s.
What does 'Default Routing' mean in 9-1-1 systems? - CORRECT ANSWER Routing to a
designated PSAP when selective routing fails.
What is the role of signaling in telecommunications? - CORRECT ANSWER To manage
communication between devices, such as SS7 for common channel signaling.
What is the purpose of 'Alternate Routing' in 9-1-1 systems? - CORRECT ANSWER To
reroute calls if all trunks are busy or out of service.
What does CRTC 2005-21 require for fixed/native VoIP in Canada? - CORRECT ANSWER It
requires them to deliver full wireline-equivalent E9-1-1.
What is the difference between on-premises and hosted PSAP equipment? - CORRECT ANSWER
On-premises equipment sits at the PSAP, while hosted equipment can serve multiple PSAPs
from a shared location.
What are the types of recording equipment used in PSAPs? - CORRECT ANSWER Full
logging recorders, instant recall recorders, and screen-capture recorders.
, What is CAD in the context of PSAPs? - CORRECT ANSWER Computer Aided Dispatch,
which automates call-taking and dispatch.
What does AVL stand for and what is its purpose? - CORRECT ANSWER Automatic Vehicle
Location; it tracks responder units via GPS for closest-unit dispatch.
What is the role of TTY/TDD in PSAPs? - CORRECT ANSWER It provides equal access as
required by ADA Title II, though its usage is declining.
What does RMS stand for? - CORRECT ANSWER Records Management System, which
documents follow-up reporting after CAD-assisted responses.
What is the trend in mobile data systems? - CORRECT ANSWER The trend is toward 4G/LTE
cellular data and FirstNet.
What is a Primary PSAP? - CORRECT ANSWER The first PSAP to receive a 9-1-1 call or
text.
What is a Virtual PSAP? - CORRECT ANSWER A PSAP not tied to a single building,
allowing staff to take calls from multiple locations.
What is the purpose of dual/mated E9-1-1 Tandems? - CORRECT ANSWER To provide
redundancy for call routing in case the primary Selective Router is unreachable.
What does MLTS stand for? - CORRECT ANSWER Multi-Line Telephone Systems.
What is Kari's Law? - CORRECT ANSWER A law requiring MLTS to provide direct access to
9-1-1 without a prefix.
What is the RAY BAUM'S Act? - CORRECT ANSWER An act that requires MLTS calls to
deliver a Dispatchable Location.
QUESTIONS AND CORRECT ANSWERS
What must all public safety Land Mobile Radio (LMR) systems be licensed by? - CORRECT
ANSWER The FCC in the US and ISED in Canada.
What is the effect of lower frequencies in radio communication? - CORRECT ANSWER They
travel farther but need more spectrum.
What is the FCC's 2013 Narrowbanding mandate? - CORRECT ANSWER It shrank channel
width from 25 kHz to 12.5 kHz below 512 MHz to free up spectrum.
What are the ITU frequency classifications for VHF? - CORRECT ANSWER VHF low band
(39-72 MHz) and VHF high band (150-170 MHz).
What is the typical range of UHF radios? - CORRECT ANSWER Approximately 25 miles.
What is trunked radio? - CORRECT ANSWER A system where users share a pool of channels
via computer-assigned 'talk groups' instead of dedicated channels.
What does P25 stand for in radio communications? - CORRECT ANSWER APCO Project 25,
the public-safety digital radio standard.
What is the difference between trunked and conventional radios? - CORRECT ANSWER
Trunked radios switch channels via software, while conventional radios require manual
switching.
What is a simplex mode in radio communication? - CORRECT ANSWER Radios talk directly
to each other on one frequency without infrastructure.
What is the purpose of a repeater system? - CORRECT ANSWER To extend the range of
communication by retransmitting signals from an elevated tower.
,What does VoIP stand for? - CORRECT ANSWER Voice over Internet Protocol.
What is the role of a Selective Router in E9-1-1 systems? - CORRECT ANSWER To centralize
call routing intelligence and send calls to the correct PSAP.
What is Enhanced 9-1-1 (E9-1-1)? - CORRECT ANSWER A system defined by the addition of
Selective Routing.
What does ANI stand for in the context of 9-1-1 calls? - CORRECT ANSWER Automatic
Number Identification.
What is the first 9-1-1 call date and location? - CORRECT ANSWER February 16, 1968, in
Haleyville, Alabama.
What is the difference between Basic 9-1-1 and Enhanced 9-1-1? - CORRECT ANSWER
Basic 9-1-1 has no caller ID and no Selective Routing, while Enhanced 9-1-1 includes
Selective Routing.
What is the function of the Emergency Service Number (ESN)? - CORRECT ANSWER To
identify the appropriate emergency service for a given area.
What is the significance of the MSAG in E9-1-1 systems? - CORRECT ANSWER It is
required for the translation of address to ESN.
What is the purpose of the VoIP Positioning Center (VPC)? - CORRECT ANSWER To store
the registered address for VoIP calls and provide location/callback data.
What does the term 'nomadic' refer to in VoIP terminals? - CORRECT ANSWER Terminals
that must be re-registered when moved.
What is the function of the control channel in trunked radio systems? - CORRECT ANSWER
To manage the assignment of channels to users.
,What technology evolution does CMRS represent? - CORRECT ANSWER Wireless carriers
connected to the Public Switched Telephone Network (PSTN).
What is the typical power output for mobile radios compared to portable radios? - CORRECT
ANSWER Mobiles transmit at up to 100W, while portables transmit at about 5W.
What is the significance of the term 'Handoff' in mobile communications? - CORRECT ANSWER
It refers to seamless cell-to-cell switching.
What does CAMA stand for in the context of 9-1-1 systems? - CORRECT ANSWER
Centralized Automatic Message Accounting.
What is the difference between analog and digital transmission? - CORRECT ANSWER
Analog carries the voice waveform directly, while digital converts voice to 1s and 0s.
What does 'Default Routing' mean in 9-1-1 systems? - CORRECT ANSWER Routing to a
designated PSAP when selective routing fails.
What is the role of signaling in telecommunications? - CORRECT ANSWER To manage
communication between devices, such as SS7 for common channel signaling.
What is the purpose of 'Alternate Routing' in 9-1-1 systems? - CORRECT ANSWER To
reroute calls if all trunks are busy or out of service.
What does CRTC 2005-21 require for fixed/native VoIP in Canada? - CORRECT ANSWER It
requires them to deliver full wireline-equivalent E9-1-1.
What is the difference between on-premises and hosted PSAP equipment? - CORRECT ANSWER
On-premises equipment sits at the PSAP, while hosted equipment can serve multiple PSAPs
from a shared location.
What are the types of recording equipment used in PSAPs? - CORRECT ANSWER Full
logging recorders, instant recall recorders, and screen-capture recorders.
, What is CAD in the context of PSAPs? - CORRECT ANSWER Computer Aided Dispatch,
which automates call-taking and dispatch.
What does AVL stand for and what is its purpose? - CORRECT ANSWER Automatic Vehicle
Location; it tracks responder units via GPS for closest-unit dispatch.
What is the role of TTY/TDD in PSAPs? - CORRECT ANSWER It provides equal access as
required by ADA Title II, though its usage is declining.
What does RMS stand for? - CORRECT ANSWER Records Management System, which
documents follow-up reporting after CAD-assisted responses.
What is the trend in mobile data systems? - CORRECT ANSWER The trend is toward 4G/LTE
cellular data and FirstNet.
What is a Primary PSAP? - CORRECT ANSWER The first PSAP to receive a 9-1-1 call or
text.
What is a Virtual PSAP? - CORRECT ANSWER A PSAP not tied to a single building,
allowing staff to take calls from multiple locations.
What is the purpose of dual/mated E9-1-1 Tandems? - CORRECT ANSWER To provide
redundancy for call routing in case the primary Selective Router is unreachable.
What does MLTS stand for? - CORRECT ANSWER Multi-Line Telephone Systems.
What is Kari's Law? - CORRECT ANSWER A law requiring MLTS to provide direct access to
9-1-1 without a prefix.
What is the RAY BAUM'S Act? - CORRECT ANSWER An act that requires MLTS calls to
deliver a Dispatchable Location.
