3CX ADVANCED CERTIFICATION EXAM 2024
NEWEST ACTUAL EXAM DETAILED 100
QUESTIONS AND GUARANTEED ANSWERS
ALREADY GRADED A+.
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
The order of "Inbound Rules" is not important when you have DID and CID "Inbound
Rules", CIDs always have higher priority. - ANSWER- False
You have a Master Bridge with 3-digit extensions 1xxx and a Slave Bridge with 4-digit
extensions 2xxx. In the "Outbound Rules" you use to rote calls across the bridge, using
a prefix is mandatory. - ANSWER- False
You have run the 3CX "Firewall Checker" and comes up as Green, but you still have
audio issues and calls dropping on on outbound / inbound calls. Can SIP ALG be the
culprit? - ANSWER- True
An extension will be allowed up to 25 attempts (default) for authenticating successfully,
after what it will be blacklisted for the default blacklisting interval of 1800 minutes. -
ANSWER- False
The 3CX SIP port should be filtered by firewall ACL rules to maximize security and allow
only trusted IPs to reach it (VoIP providers or STUN extensions if any). - ANSWER-
True
NEWEST ACTUAL EXAM DETAILED 100
QUESTIONS AND GUARANTEED ANSWERS
ALREADY GRADED A+.
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
The order of "Inbound Rules" is not important when you have DID and CID "Inbound
Rules", CIDs always have higher priority. - ANSWER- False
You have a Master Bridge with 3-digit extensions 1xxx and a Slave Bridge with 4-digit
extensions 2xxx. In the "Outbound Rules" you use to rote calls across the bridge, using
a prefix is mandatory. - ANSWER- False
You have run the 3CX "Firewall Checker" and comes up as Green, but you still have
audio issues and calls dropping on on outbound / inbound calls. Can SIP ALG be the
culprit? - ANSWER- True
An extension will be allowed up to 25 attempts (default) for authenticating successfully,
after what it will be blacklisted for the default blacklisting interval of 1800 minutes. -
ANSWER- False
The 3CX SIP port should be filtered by firewall ACL rules to maximize security and allow
only trusted IPs to reach it (VoIP providers or STUN extensions if any). - ANSWER-
True
