3CX Academy Advanced Certification Exam
Practice Questions & Verified Answers |
Comprehensive 3CX Advanced Certification Exam
Review | 2026–2027
, In the criteria of the "Outbound Rules", "Calls from True
Extension(s)" having comma separated values will allow
multiple extension ranges to be defined
The Virtual Extension of the slave must match the master True
side virtual extension number
For extensions that are registered over multiple site-to-site False
VPNs, by default 3CX delivers the audio between phones
if they are on different subnets.
On outbound calls to external numbers, 3CX will process False
"Outbound Rules" in a "Best Matching" way, depending on
how many of the criteria match.
Wireshark can - without any additional Plugins Decode all False
Codecs including G711A, G711U, GSM, G729, G726
STUN extensions can be configured to connect to the False
tunnel port of 3CX instead of the SIP port for more
security.
The log files of 3CX are never cleaned even when you False
restart the 3CX Services
Once Secure SIP has been configured in 3CX, Secure SIP False
certificates will need to be deployed manually in phones
and softphones OS so that they can communicate.
Remote extensions may be provisioned using the HTTP or False
HTTPS URLs
The default Voicemail PIN of an extension consist of 4 False
random alphanumerical characters.
Your 3CX has only one SIP Trunk and receives a call from True
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.
When 3CX has been installed without a FQDN from 3CX True
and in split DNS mode, the DNS server must not be
installed on the same machine as the phone system.
Your Local IP Phone loses the registration to 3CX and you True
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
Your 3CX has only one SIP Trunk and receives a call from True
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.
Practice Questions & Verified Answers |
Comprehensive 3CX Advanced Certification Exam
Review | 2026–2027
, In the criteria of the "Outbound Rules", "Calls from True
Extension(s)" having comma separated values will allow
multiple extension ranges to be defined
The Virtual Extension of the slave must match the master True
side virtual extension number
For extensions that are registered over multiple site-to-site False
VPNs, by default 3CX delivers the audio between phones
if they are on different subnets.
On outbound calls to external numbers, 3CX will process False
"Outbound Rules" in a "Best Matching" way, depending on
how many of the criteria match.
Wireshark can - without any additional Plugins Decode all False
Codecs including G711A, G711U, GSM, G729, G726
STUN extensions can be configured to connect to the False
tunnel port of 3CX instead of the SIP port for more
security.
The log files of 3CX are never cleaned even when you False
restart the 3CX Services
Once Secure SIP has been configured in 3CX, Secure SIP False
certificates will need to be deployed manually in phones
and softphones OS so that they can communicate.
Remote extensions may be provisioned using the HTTP or False
HTTPS URLs
The default Voicemail PIN of an extension consist of 4 False
random alphanumerical characters.
Your 3CX has only one SIP Trunk and receives a call from True
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.
When 3CX has been installed without a FQDN from 3CX True
and in split DNS mode, the DNS server must not be
installed on the same machine as the phone system.
Your Local IP Phone loses the registration to 3CX and you True
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
Your 3CX has only one SIP Trunk and receives a call from True
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.
