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3CX ACADEMY ADVANCED CERTIFICATION
EXAM ACTUAL EXAM COMPLETE 150
QUESTIONS WITH DETAILED VERIFIED
ANSWERS / ALREADY GRADED A+
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
SRTP will secure calls so that a middle-man can't see the SIP
traffic in plain-text. - ANSWER ✔✔- False
CID and DID "Inbound Rules" can both be configured to route
calls differently depending on the Office Hours. - ANSWER ✔✔-
True
"Prepend" will add digits to the end of the dialed number before
sending hte call to the destination defined in the "Route" -
ANSWER ✔✔- False
Your Local IP Phone loses the Registration to 3CX and you want
to troubleshoot the issue. You should start a Wireshark Capture
on the 3CX Server, reboot the phone, and then apply the Filter
sip.Cseq.Method==SUBSCRIBE in order to see if registrations are
reaching 3CX. - ANSWER ✔✔- False
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The "Server Activity Log" will provide information for: Phone
Registrations, Gateway and SIP Trunk Interactions, All Related
Calls - ANSWER ✔✔- True
Each extension gets a default password which is always the same
and should be changed for more safety. - ANSWER ✔✔- False
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
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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
3CX ACADEMY ADVANCED CERTIFICATION
EXAM ACTUAL EXAM COMPLETE 150
QUESTIONS WITH DETAILED VERIFIED
ANSWERS / ALREADY GRADED A+
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
SRTP will secure calls so that a middle-man can't see the SIP
traffic in plain-text. - ANSWER ✔✔- False
CID and DID "Inbound Rules" can both be configured to route
calls differently depending on the Office Hours. - ANSWER ✔✔-
True
"Prepend" will add digits to the end of the dialed number before
sending hte call to the destination defined in the "Route" -
ANSWER ✔✔- False
Your Local IP Phone loses the Registration to 3CX and you want
to troubleshoot the issue. You should start a Wireshark Capture
on the 3CX Server, reboot the phone, and then apply the Filter
sip.Cseq.Method==SUBSCRIBE in order to see if registrations are
reaching 3CX. - ANSWER ✔✔- False
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The "Server Activity Log" will provide information for: Phone
Registrations, Gateway and SIP Trunk Interactions, All Related
Calls - ANSWER ✔✔- True
Each extension gets a default password which is always the same
and should be changed for more safety. - ANSWER ✔✔- False
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
, 3|Page
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
