3CX ACADEMY ADVANCED
CERTIFICATION EXAM ACTUAL EXAM
COMPLETE 150 QUESTIONS WITH
DETAILED VERIFIED ANSWERS
True -📌📌 - In the criteria of the "Outbound Rules", "Calls from Extension(s)"
having comma separated values will allow multiple extension ranges to be
defined
True -📌📌 - The Virtual Extension of the slave must match the master side
virtual extension number
False - 📌📌 - 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.
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.
False - 📌📌 - Wireshark can - without any additional Plugins Decode all Codecs
including G711A, G711U, GSM, G729, G726
False - 📌📌 - STUN extensions can be configured to connect to the tunnel port
of 3CX instead of the SIP port for more security.
False - 📌📌- The log files of 3CX are never cleaned even when you restart the
3CX Services
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.
False - 📌📌- Remote extensions may be provisioned using the HTTP or HTTPS
URLs
False - 📌📌- The default Voicemail PIN of an extension consist of 4 random
alphanumerical characters.
True -📌📌 - 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
, 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.
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
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.
True - 📌📌 - When selecting the option "I need a 3CX FQDN" an internal DNS is
not mandatory
False - 📌📌 - The order of "Inbound Rules" is not important when you have DID
and CID "Inbound Rules", CIDs always have higher priority.
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.
True - 📌📌 - 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?
False - 📌📌 - 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.
True - 📌📌 - 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).
False - 📌📌 - SRTP will secure calls so that a middle-man can't see the SIP
traffic in plain-text.
True - 📌📌 - CID and DID "Inbound Rules" can both be configured to route calls
differently depending on the Office Hours.
False - 📌📌 - "Prepend" will add digits to the end of the dialed number before
sending hte call to the destination defined in the "Route"
CERTIFICATION EXAM ACTUAL EXAM
COMPLETE 150 QUESTIONS WITH
DETAILED VERIFIED ANSWERS
True -📌📌 - In the criteria of the "Outbound Rules", "Calls from Extension(s)"
having comma separated values will allow multiple extension ranges to be
defined
True -📌📌 - The Virtual Extension of the slave must match the master side
virtual extension number
False - 📌📌 - 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.
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.
False - 📌📌 - Wireshark can - without any additional Plugins Decode all Codecs
including G711A, G711U, GSM, G729, G726
False - 📌📌 - STUN extensions can be configured to connect to the tunnel port
of 3CX instead of the SIP port for more security.
False - 📌📌- The log files of 3CX are never cleaned even when you restart the
3CX Services
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.
False - 📌📌- Remote extensions may be provisioned using the HTTP or HTTPS
URLs
False - 📌📌- The default Voicemail PIN of an extension consist of 4 random
alphanumerical characters.
True -📌📌 - 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
, 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.
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
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.
True - 📌📌 - When selecting the option "I need a 3CX FQDN" an internal DNS is
not mandatory
False - 📌📌 - The order of "Inbound Rules" is not important when you have DID
and CID "Inbound Rules", CIDs always have higher priority.
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.
True - 📌📌 - 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?
False - 📌📌 - 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.
True - 📌📌 - 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).
False - 📌📌 - SRTP will secure calls so that a middle-man can't see the SIP
traffic in plain-text.
True - 📌📌 - CID and DID "Inbound Rules" can both be configured to route calls
differently depending on the Office Hours.
False - 📌📌 - "Prepend" will add digits to the end of the dialed number before
sending hte call to the destination defined in the "Route"
