3CX Academy Advanced Certification Exam
2026 | Practice Questions & Technical Study
Guide | Verified Answers for 3CX VoIP
Certification
3CX ACADEMY ADVANCED CERTIFICATION EXAM 2026
Practice Questions & Technical Study Guide - Verified Answers
DOCUMENT OVERVIEW
• This comprehensive study guide contains 200 verified multiple-choice questions
designed to thoroughly prepare you for the 3CX Advanced Certification Exam with
detailed explanations for every answer
• Study this material systematically by reviewing 10-15 questions daily, focusing on
understanding the EXPERT RATIONALE behind each correct answer to master 3CX
VoIP system management, configuration, security, and advanced features
EXAM QUESTIONS
QUESTION 1
What is the primary function of the 3CX Management Console?
A) To manage backup and disaster recovery only
B) To provide centralized administration and configuration of the entire 3CX
system
C) To handle only call recording and monitoring
D) To manage third-party SIP provider credentials exclusively
E) To control physical phone hardware settings only
CORRECT ANSWER: B
,EXPERT RATIONALE: The 3CX Management Console is the central administration
hub that allows administrators to manage all aspects of the 3CX system including
users, extensions, call routing, integrations, security settings, and system
configuration. While it does handle multiple functions, its primary purpose is
centralized system administration and configuration.
QUESTION 2
Which of the following is NOT a supported deployment model for 3CX?
A) On-Premise deployment
B) Cloud-only deployment with mandatory daily internet connectivity checks
C) Hybrid deployment combining on-premise and cloud
D) Virtual machine deployment on VMware
E) Docker container deployment
CORRECT ANSWER: B
EXPERT RATIONALE: 3CX supports multiple deployment models including on-
premise, cloud, hybrid, virtual machines, and containers. However, there is no
mandatory daily internet connectivity check requirement for cloud-only
deployments. The system is designed to be flexible with various connectivity
options.
QUESTION 3
What is the maximum number of concurrent calls that a standard 3CX
Instance can handle?
A) 50 concurrent calls
B) 100 concurrent calls
C) Unlimited concurrent calls (limited only by hardware resources and license
type)
,D) 500 concurrent calls
E) 1000 concurrent calls
CORRECT ANSWER: C
EXPERT RATIONALE: 3CX's call capacity is not limited by software restrictions but
rather by the hardware resources available and the licensing model chosen. The
system can scale from small deployments to enterprise systems handling
thousands of concurrent calls depending on server specifications and licensing tier.
QUESTION 4
Which protocol is primarily used by 3CX for VoIP communications?
A) H.323 exclusively
B) SIP (Session Initiation Protocol)
C) MGCP only
D) SCCP exclusively
E) Proprietary 3CX protocol
CORRECT ANSWER: B
EXPERT RATIONALE: SIP (Session Initiation Protocol) is the industry-standard
protocol used by 3CX for VoIP communications. While 3CX supports other protocols
like H.323 for interoperability, SIP is the primary and recommended protocol for
modern VoIP deployments.
QUESTION 5
What is the recommended minimum bandwidth required for a single VoIP call
in 3CX?
A) 64 kbps
B) 100 kbps (64 kbps codec + 36 kbps overhead)
, C) 256 kbps
D) 512 kbps
E) 1 Mbps
CORRECT ANSWER: B
EXPERT RATIONALE: While the G.711 codec uses approximately 64 kbps, when
accounting for RTP overhead and other protocol requirements, the recommended
minimum bandwidth for a single quality VoIP call is approximately 100 kbps. This
ensures adequate quality and accounts for packet overhead.
QUESTION 6
Which of the following codecs provides the best compression while
maintaining voice quality in 3CX?
A) G.711
B) G.723
C) G.729 or Opus (depending on requirements)
D) PCM
E) ADPCM
CORRECT ANSWER: C
EXPERT RATIONALE: G.729 and Opus codecs provide excellent compression with
minimal bandwidth consumption while maintaining acceptable voice quality. G.729
uses 8 kbps and is widely supported, while Opus offers superior quality at various
bitrates. Both are superior to G.711 for bandwidth efficiency while maintaining
quality.
QUESTION 7
How are user extensions typically created in 3CX?
2026 | Practice Questions & Technical Study
Guide | Verified Answers for 3CX VoIP
Certification
3CX ACADEMY ADVANCED CERTIFICATION EXAM 2026
Practice Questions & Technical Study Guide - Verified Answers
DOCUMENT OVERVIEW
• This comprehensive study guide contains 200 verified multiple-choice questions
designed to thoroughly prepare you for the 3CX Advanced Certification Exam with
detailed explanations for every answer
• Study this material systematically by reviewing 10-15 questions daily, focusing on
understanding the EXPERT RATIONALE behind each correct answer to master 3CX
VoIP system management, configuration, security, and advanced features
EXAM QUESTIONS
QUESTION 1
What is the primary function of the 3CX Management Console?
A) To manage backup and disaster recovery only
B) To provide centralized administration and configuration of the entire 3CX
system
C) To handle only call recording and monitoring
D) To manage third-party SIP provider credentials exclusively
E) To control physical phone hardware settings only
CORRECT ANSWER: B
,EXPERT RATIONALE: The 3CX Management Console is the central administration
hub that allows administrators to manage all aspects of the 3CX system including
users, extensions, call routing, integrations, security settings, and system
configuration. While it does handle multiple functions, its primary purpose is
centralized system administration and configuration.
QUESTION 2
Which of the following is NOT a supported deployment model for 3CX?
A) On-Premise deployment
B) Cloud-only deployment with mandatory daily internet connectivity checks
C) Hybrid deployment combining on-premise and cloud
D) Virtual machine deployment on VMware
E) Docker container deployment
CORRECT ANSWER: B
EXPERT RATIONALE: 3CX supports multiple deployment models including on-
premise, cloud, hybrid, virtual machines, and containers. However, there is no
mandatory daily internet connectivity check requirement for cloud-only
deployments. The system is designed to be flexible with various connectivity
options.
QUESTION 3
What is the maximum number of concurrent calls that a standard 3CX
Instance can handle?
A) 50 concurrent calls
B) 100 concurrent calls
C) Unlimited concurrent calls (limited only by hardware resources and license
type)
,D) 500 concurrent calls
E) 1000 concurrent calls
CORRECT ANSWER: C
EXPERT RATIONALE: 3CX's call capacity is not limited by software restrictions but
rather by the hardware resources available and the licensing model chosen. The
system can scale from small deployments to enterprise systems handling
thousands of concurrent calls depending on server specifications and licensing tier.
QUESTION 4
Which protocol is primarily used by 3CX for VoIP communications?
A) H.323 exclusively
B) SIP (Session Initiation Protocol)
C) MGCP only
D) SCCP exclusively
E) Proprietary 3CX protocol
CORRECT ANSWER: B
EXPERT RATIONALE: SIP (Session Initiation Protocol) is the industry-standard
protocol used by 3CX for VoIP communications. While 3CX supports other protocols
like H.323 for interoperability, SIP is the primary and recommended protocol for
modern VoIP deployments.
QUESTION 5
What is the recommended minimum bandwidth required for a single VoIP call
in 3CX?
A) 64 kbps
B) 100 kbps (64 kbps codec + 36 kbps overhead)
, C) 256 kbps
D) 512 kbps
E) 1 Mbps
CORRECT ANSWER: B
EXPERT RATIONALE: While the G.711 codec uses approximately 64 kbps, when
accounting for RTP overhead and other protocol requirements, the recommended
minimum bandwidth for a single quality VoIP call is approximately 100 kbps. This
ensures adequate quality and accounts for packet overhead.
QUESTION 6
Which of the following codecs provides the best compression while
maintaining voice quality in 3CX?
A) G.711
B) G.723
C) G.729 or Opus (depending on requirements)
D) PCM
E) ADPCM
CORRECT ANSWER: C
EXPERT RATIONALE: G.729 and Opus codecs provide excellent compression with
minimal bandwidth consumption while maintaining acceptable voice quality. G.729
uses 8 kbps and is widely supported, while Opus offers superior quality at various
bitrates. Both are superior to G.711 for bandwidth efficiency while maintaining
quality.
QUESTION 7
How are user extensions typically created in 3CX?
