3CX Academy, Advanced Certification
Exam 2026: Complete Exam Prep with
Questions, Answers & Detailed
Explanations
In the criteria of the "Outbound Rules", "Calls from
Extension(s)" having comma separated values will allow
multiple extension ranges to be defined - ✔✔ANSWER
✔✔-True
The Virtual Extension of the slave must match the master
side virtual extension number - ✔✔ANSWER ✔✔-True
,For extensions that are registered over multiple site-to-
site VPNs, by default 3CX delivers the audio between
phones if they are on different subnets. - ✔✔ANSWER
✔✔-False
On outbound calls to external numbers, 3CX will process
"Outbound Rules" in a "Best Matching" way, depending
on how many of the criteria match. - ✔✔ANSWER ✔✔-
False
Wireshark can - without any additional Plugins Decode all
Codecs including G711A, G711U, GSM, G729, G726 -
✔✔ANSWER ✔✔-False
STUN extensions can be configured to connect to the
tunnel port of 3CX instead of the SIP port for more
security. - ✔✔ANSWER ✔✔-False
The log files of 3CX are never cleaned even when you
restart the 3CX Services - ✔✔ANSWER ✔✔-False
,Once Secure SIP has been configured in 3CX, Secure SIP
certificates will need to be deployed manually in phones
and softphones OS so that they can communicate. -
✔✔ANSWER ✔✔-False
Remote extensions may be provisioned using the HTTP or
HTTPS URLs - ✔✔ANSWER ✔✔-False
The default Voicemail PIN of an extension consist of 4
random alphanumerical characters. - ✔✔ANSWER ✔✔-
False
Your 3CX has only one SIP Trunk and receives a call from
number 8135791691. If you have a "Inbound CID
Reformatting" rule on the Trunk with "Source Pattern"
813(...)(.*) and "Replace Pattern" \1\2, the extension
that receives the call will see "5791691" as the caller ID
on its display. - ✔✔ANSWER ✔✔-True
, When 3CX has been installed without a FQDN from 3CX
and in split DNS mode, the DNS server must not be
installed on the same machine as the phone system. -
✔✔ANSWER ✔✔-True
Your Local IP Phone loses the registration to 3CX and you
want do troubleshoot the issue. You should start a
Wireshark Capture on the 3CX Server, reboot the phone,
and then apply the Filter sip.Cseq.Method==REGISTER in
order to see if registrations are reaching 3CX -
✔✔ANSWER ✔✔-True
Your 3CX has only one SIP Trunk and receives a call from
number 422033272020 and you want it to be presented
on the extension display as +44272020. You can do this
with a "Inbound CID Reformatting" rule on the Trunk
with "Source Pattern" 44(..)(..)(.*) and "Replace Pattern"
+44\3. - ✔✔ANSWER ✔✔-True
When selecting the option "I need a 3CX FQDN" an
internal DNS is not mandatory - ✔✔ANSWER ✔✔-True
Exam 2026: Complete Exam Prep with
Questions, Answers & Detailed
Explanations
In the criteria of the "Outbound Rules", "Calls from
Extension(s)" having comma separated values will allow
multiple extension ranges to be defined - ✔✔ANSWER
✔✔-True
The Virtual Extension of the slave must match the master
side virtual extension number - ✔✔ANSWER ✔✔-True
,For extensions that are registered over multiple site-to-
site VPNs, by default 3CX delivers the audio between
phones if they are on different subnets. - ✔✔ANSWER
✔✔-False
On outbound calls to external numbers, 3CX will process
"Outbound Rules" in a "Best Matching" way, depending
on how many of the criteria match. - ✔✔ANSWER ✔✔-
False
Wireshark can - without any additional Plugins Decode all
Codecs including G711A, G711U, GSM, G729, G726 -
✔✔ANSWER ✔✔-False
STUN extensions can be configured to connect to the
tunnel port of 3CX instead of the SIP port for more
security. - ✔✔ANSWER ✔✔-False
The log files of 3CX are never cleaned even when you
restart the 3CX Services - ✔✔ANSWER ✔✔-False
,Once Secure SIP has been configured in 3CX, Secure SIP
certificates will need to be deployed manually in phones
and softphones OS so that they can communicate. -
✔✔ANSWER ✔✔-False
Remote extensions may be provisioned using the HTTP or
HTTPS URLs - ✔✔ANSWER ✔✔-False
The default Voicemail PIN of an extension consist of 4
random alphanumerical characters. - ✔✔ANSWER ✔✔-
False
Your 3CX has only one SIP Trunk and receives a call from
number 8135791691. If you have a "Inbound CID
Reformatting" rule on the Trunk with "Source Pattern"
813(...)(.*) and "Replace Pattern" \1\2, the extension
that receives the call will see "5791691" as the caller ID
on its display. - ✔✔ANSWER ✔✔-True
, When 3CX has been installed without a FQDN from 3CX
and in split DNS mode, the DNS server must not be
installed on the same machine as the phone system. -
✔✔ANSWER ✔✔-True
Your Local IP Phone loses the registration to 3CX and you
want do troubleshoot the issue. You should start a
Wireshark Capture on the 3CX Server, reboot the phone,
and then apply the Filter sip.Cseq.Method==REGISTER in
order to see if registrations are reaching 3CX -
✔✔ANSWER ✔✔-True
Your 3CX has only one SIP Trunk and receives a call from
number 422033272020 and you want it to be presented
on the extension display as +44272020. You can do this
with a "Inbound CID Reformatting" rule on the Trunk
with "Source Pattern" 44(..)(..)(.*) and "Replace Pattern"
+44\3. - ✔✔ANSWER ✔✔-True
When selecting the option "I need a 3CX FQDN" an
internal DNS is not mandatory - ✔✔ANSWER ✔✔-True
