3CX Academy, Advanced Certification Questions and Correct Answers
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Course
3CX Academy, Advanced Certification
Institution
3CX Academy, Advanced Certification
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
~~~ True
For extensions that are registered o...
3CX Academy, Advanced Certification
Questions and Correct Answers
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
✓ ~~~ 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.
✓ ~~~ 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.
✓ ~~~ 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.
✓ ~~~ 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
✓ ~~~ True
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.
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