ENP EXAM PREP -EMERGENCY NUMBER
PROFESSIONAL |ACTUAL QUESTIONS AND
VERIFIED ANSWERS|BRAND NEW 2026-2027
UPDATE|GRADED A+
Question 1
Traditional telephone topology consists of what four components?
A. Central office, tandem or access tandem, radio tower, end office
B. Tandem or access tandem, facility or facilities, central office, PSAP
C. End office, tandem or access tandem, facility or facilities, or CO's
D. PSAP, end office, tandem or access tandem, radio tower.
CORRECT ANSWER
End office, tandem or access tandem, facility or facilities, or CO's
Question 2
Selective routing is the process by which 911 calls are delivered to a specific PSAP based
upon:
A. Street address of the caller
B. ESN of the caller
C. Area code of the caller
D. Municipality of the caller
CORRECT ANSWER
ESN of the caller
1
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,Question 3
The Loss of a Selective Router will cause the following issue/issues to a PSAP
A. Loss of communication between the PSAP and the 911 network
B. Loss of ANI & Call Routing services
C. Failure of a Tandem Switch
D. Loss of Dial Tone
CORRECT ANSWER
Loss of Ani & Call Routing Services
Question 4
This protocol is used as the call signaling protocol in VoIP i2 and i3
A. Session initiation protocol
B. Signaling connection control part
C. Simple network management protocol
D. Simple object access protocol
CORRECT ANSWER
Session initiation protocol
Question 5
The feature that separates basic 911 from enhanced 911 is:
A. Selective Routing
B. Ani
C. Ali
D. Ani/Ali
CORRECT ANSWER
2
@THE STUDY VAULT
, Selective Routing
Question 6
If a call center receives more calls than its resources can handle at any given time, the
overflow of calls routed to another agency is called :
A. Contingency Routing
B. Alternate Routing
C. Default Routing
D. Agency to agency transfer
CORRECT ANSWER
Alternate Routing
Question 7
Camas original purpose was:
A. To deliver 9-1-1 calls to the PSAP
B. To bill for toll calls
C. To connect end offices
D. To provide ten-digit ANI
CORRECT ANSWER
To bill for toll calls
Question 8
A ______________ system transmits the message over more than one transmitter .
A. Simplex
3
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, B. Simulcast
C. Local loop
D. Dedicated
CORRECT ANSWER
Simulcast
Question 9
An IP network or IP virtual Network that is used for communications between PSAPs and
among other entities that support or are supported by PSAPs in providing emergency call
handling and response is called :
A. ESInet
B. Legacy PSAP gateway
C. Emergency call Routing function
D. Emergency services Routing proxy
CORRECT ANSWER
ESInet
Question 10
On a phase 1 call how many digits are delivered to the PSAP through the selective router
A. 20 digits
B. 14 digits
C. 10 digits
D. 7 digits
CORRECT ANSWER
20 digits
4
@THE STUDY VAULT
PROFESSIONAL |ACTUAL QUESTIONS AND
VERIFIED ANSWERS|BRAND NEW 2026-2027
UPDATE|GRADED A+
Question 1
Traditional telephone topology consists of what four components?
A. Central office, tandem or access tandem, radio tower, end office
B. Tandem or access tandem, facility or facilities, central office, PSAP
C. End office, tandem or access tandem, facility or facilities, or CO's
D. PSAP, end office, tandem or access tandem, radio tower.
CORRECT ANSWER
End office, tandem or access tandem, facility or facilities, or CO's
Question 2
Selective routing is the process by which 911 calls are delivered to a specific PSAP based
upon:
A. Street address of the caller
B. ESN of the caller
C. Area code of the caller
D. Municipality of the caller
CORRECT ANSWER
ESN of the caller
1
@THE STUDY VAULT
,Question 3
The Loss of a Selective Router will cause the following issue/issues to a PSAP
A. Loss of communication between the PSAP and the 911 network
B. Loss of ANI & Call Routing services
C. Failure of a Tandem Switch
D. Loss of Dial Tone
CORRECT ANSWER
Loss of Ani & Call Routing Services
Question 4
This protocol is used as the call signaling protocol in VoIP i2 and i3
A. Session initiation protocol
B. Signaling connection control part
C. Simple network management protocol
D. Simple object access protocol
CORRECT ANSWER
Session initiation protocol
Question 5
The feature that separates basic 911 from enhanced 911 is:
A. Selective Routing
B. Ani
C. Ali
D. Ani/Ali
CORRECT ANSWER
2
@THE STUDY VAULT
, Selective Routing
Question 6
If a call center receives more calls than its resources can handle at any given time, the
overflow of calls routed to another agency is called :
A. Contingency Routing
B. Alternate Routing
C. Default Routing
D. Agency to agency transfer
CORRECT ANSWER
Alternate Routing
Question 7
Camas original purpose was:
A. To deliver 9-1-1 calls to the PSAP
B. To bill for toll calls
C. To connect end offices
D. To provide ten-digit ANI
CORRECT ANSWER
To bill for toll calls
Question 8
A ______________ system transmits the message over more than one transmitter .
A. Simplex
3
@THE STUDY VAULT
, B. Simulcast
C. Local loop
D. Dedicated
CORRECT ANSWER
Simulcast
Question 9
An IP network or IP virtual Network that is used for communications between PSAPs and
among other entities that support or are supported by PSAPs in providing emergency call
handling and response is called :
A. ESInet
B. Legacy PSAP gateway
C. Emergency call Routing function
D. Emergency services Routing proxy
CORRECT ANSWER
ESInet
Question 10
On a phase 1 call how many digits are delivered to the PSAP through the selective router
A. 20 digits
B. 14 digits
C. 10 digits
D. 7 digits
CORRECT ANSWER
20 digits
4
@THE STUDY VAULT
