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3CX Advanced Certification Exam (2024–2025) — Practice Questions & Verified Answers

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he document appears to be a study or exam preparation guide containing: Multiple-choice or true/false questions Answers highlighted for each question Content focused on 3CX Advanced Certification topics, such as SIP routing, codecs, and call handling.

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3CX Advanced
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Uploaded on
November 16, 2025
Number of pages
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Written in
2025/2026
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PROFNOVIEK



3CX Advanced Certification Exam (Latest
2024/ 2025) | Questions and Verified Answers|
Grade A+

QUESTION
An outbound call is routed through the VoIP Provider. This "Route" of the "Outbound Rule" has
"Strip Digits" set as 0 and has no values in the "Prepend" field. A user dials 004433272020. 3CX
will send the call to the provider exactly as dialed


Answer:
True



QUESTION
You can use the same VoIP Provider in all of the Outgoing Routes of a rule


Answer:
True



QUESTION
If you want to decode audio in wireshark without any plugins, your calls will need to be using
either G711A or G711U


Answer:
True



QUESTION
If you want to check the internal PBX routing of a call, the most reliable way is through the use
of the Binary Log Viewer, or which you must know some information about the call you are
investigating, like the Caller ID, the time of the call, etc.


Answer:

, PROFNOVIEK


True



QUESTION
Assume the following scenario: 3CX is connected via a site-to-site VPN with two different
buildings where remote phones have been provisioned. 3CX is on network 192.168.9.xxx,
Phones on location A are on network 192.168.3.xxx, Phones on location B are on network
192.168.8.xxx. When a call is established, between an extension on remote location A to an
extension to remote location B, by default 3CX will proxy the SIP and audio traffic and send it to
the extensions


Answer:
True



QUESTION
Assume the following scenario: 2 Phone Systems bridged over a site-to-site VPN connection.
Phone system A on network 192.168.9.xxx, Phone System B on network 192.168.3.xxx. The
options "Supports Re-Invite" and "Supports Re-places" are enabled on the bridge settings. When
a call is established between an extension from PBX A to an extension behind PBX B, the audio
will be exchanged directly between the 2 extensions.


Answer:
False



QUESTION
When an established call from your local extension to an external number is terminated from
your IP Phone you should see a BYE being send in from the Provider / PSTN gateway, towards
your PBX IP address in wireshark


Answer:
False



QUESTION
When 3CX has been installed without an FQDN from 3CX and in split DNS mode, the DNS
server must not be installed on the same machine as the phone system
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