3CX BASIC AND ADVANCED CERTIFICATION
EXAM QUESTIONS AND 100% VERIFIED ANSWERS
WITH RATIONALES GRADED A+
GUARANTEED PASS ON THE FIRST ATTEMPT
1. Which operating systems are supported for 3CX installation?
A. 32-bit Windows 7 and Linux 32-bit
B. 64-bit Windows 10 and Linux 64-bit
C. 32-bit Windows 10 only
D. Any Windows or Linux OS
Answer: B
Rationale: 3CX requires a 64-bit OS for proper operation; 32-bit versions are not
supported. Both Windows and Linux 64-bit are supported.
2. Which port is used for the 3CX SIP signaling by default?
A. 5060
B. 443
C. 8080
D. 5090
Answer: A
Rationale: Port 5060 is the standard SIP port used by 3CX for signaling.
, 3. A new extension has been created but cannot receive calls. Which
configuration should you check first?
A. Firewall rules
B. Extension voicemail PIN
C. SIP trunk registration
D. Call queue settings
Answer: C
Rationale: If an extension cannot receive calls, the first step is to ensure it is
properly registered with the PBX via SIP.
4. What is the default PIN length for 3CX voicemail?
A. 3 digits
B. 4 digits
C. 6 digits
D. 8 digits
Answer: B
Rationale: 3CX sets a default 4-digit PIN for voicemail access.
5. Which of the following is not a required firewall port for basic 3CX
operation?
A. 5060
B. 5090
C. 5001
D. 22
Answer: D
Rationale: Port 22 is used for SSH (Linux) but is not required for 3CX PBX basic
operations.
, 6. An administrator needs to provision an IP phone automatically. Which
feature should they use?
A. Extension provisioning
B. Firewall wizard
C. Call queues
D. Bridges
Answer: A
Rationale: Automatic provisioning allows IP phones to be connected and
configured without manual intervention.
7. Which emergency number should be avoided when setting up internal
extensions in Australia?
A. 911
B. 999
C. 000
D. 112
Answer: C
Rationale: 000 is reserved for emergency services in Australia and should not be
used internally to avoid misrouting.
8. A user reports they cannot connect to the 3CX web client remotely.
Which step should the admin check first?
A. Extension voicemail PIN
B. Inbound rules
C. Firewall port 5001
D. Call queues
Answer: C
Rationale: Port 5001 is the default HTTPS port for remote access to 3CX. If
blocked, remote access will fail.
, 9. Which feature allows multiple incoming calls to be distributed among
available agents?
A. Call queue
B. SIP trunk
C. Bridge
D. Extension group
Answer: A
Rationale: Call queues manage incoming calls and distribute them to agents based
on configured rules.
10. Which of the following is a valid step for basic outbound call setup?
A. Configure trunk CID and route rules
B. Install Wireshark
C. Generate PFX certificate
D. Enable STUN server
Answer: A
Rationale: Outbound calls require the correct configuration of trunk caller ID and
routing rules.
11. You need to allow a remote 3CX app to register. Which type of network
configuration is necessary?
A. STUN or public IP NAT traversal
B. VPN only
C. Local subnet only
D. No special configuration
Answer: A
Rationale: STUN helps traverse NAT for remote 3CX app registration.
EXAM QUESTIONS AND 100% VERIFIED ANSWERS
WITH RATIONALES GRADED A+
GUARANTEED PASS ON THE FIRST ATTEMPT
1. Which operating systems are supported for 3CX installation?
A. 32-bit Windows 7 and Linux 32-bit
B. 64-bit Windows 10 and Linux 64-bit
C. 32-bit Windows 10 only
D. Any Windows or Linux OS
Answer: B
Rationale: 3CX requires a 64-bit OS for proper operation; 32-bit versions are not
supported. Both Windows and Linux 64-bit are supported.
2. Which port is used for the 3CX SIP signaling by default?
A. 5060
B. 443
C. 8080
D. 5090
Answer: A
Rationale: Port 5060 is the standard SIP port used by 3CX for signaling.
, 3. A new extension has been created but cannot receive calls. Which
configuration should you check first?
A. Firewall rules
B. Extension voicemail PIN
C. SIP trunk registration
D. Call queue settings
Answer: C
Rationale: If an extension cannot receive calls, the first step is to ensure it is
properly registered with the PBX via SIP.
4. What is the default PIN length for 3CX voicemail?
A. 3 digits
B. 4 digits
C. 6 digits
D. 8 digits
Answer: B
Rationale: 3CX sets a default 4-digit PIN for voicemail access.
5. Which of the following is not a required firewall port for basic 3CX
operation?
A. 5060
B. 5090
C. 5001
D. 22
Answer: D
Rationale: Port 22 is used for SSH (Linux) but is not required for 3CX PBX basic
operations.
, 6. An administrator needs to provision an IP phone automatically. Which
feature should they use?
A. Extension provisioning
B. Firewall wizard
C. Call queues
D. Bridges
Answer: A
Rationale: Automatic provisioning allows IP phones to be connected and
configured without manual intervention.
7. Which emergency number should be avoided when setting up internal
extensions in Australia?
A. 911
B. 999
C. 000
D. 112
Answer: C
Rationale: 000 is reserved for emergency services in Australia and should not be
used internally to avoid misrouting.
8. A user reports they cannot connect to the 3CX web client remotely.
Which step should the admin check first?
A. Extension voicemail PIN
B. Inbound rules
C. Firewall port 5001
D. Call queues
Answer: C
Rationale: Port 5001 is the default HTTPS port for remote access to 3CX. If
blocked, remote access will fail.
, 9. Which feature allows multiple incoming calls to be distributed among
available agents?
A. Call queue
B. SIP trunk
C. Bridge
D. Extension group
Answer: A
Rationale: Call queues manage incoming calls and distribute them to agents based
on configured rules.
10. Which of the following is a valid step for basic outbound call setup?
A. Configure trunk CID and route rules
B. Install Wireshark
C. Generate PFX certificate
D. Enable STUN server
Answer: A
Rationale: Outbound calls require the correct configuration of trunk caller ID and
routing rules.
11. You need to allow a remote 3CX app to register. Which type of network
configuration is necessary?
A. STUN or public IP NAT traversal
B. VPN only
C. Local subnet only
D. No special configuration
Answer: A
Rationale: STUN helps traverse NAT for remote 3CX app registration.
