Your 3CX Certification – Premium Exam
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Materials
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In the criteria of the "Outbound Rules", "Calls from Extension(s)" having comma separated values will allow
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multiple extension ranges to be defined - CORRECT ANSWER✔✔True
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The Virtual Extension of the slave must match the master side virtual extension number - CORRECT ANSWER
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✔✔True
For extensions that are registered over multiple site-to-site VPNs, by default 3CX delivers the audio between
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phones if they are on different subnets. - CORRECT ANSWER✔✔False
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On outbound calls to external numbers, 3CX will process "Outbound Rules" in a "Best Matching" way,
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depending on how many of the criteria match. - CORRECT ANSWER✔✔False
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Wireshark can - without any additional Plugins Decode all Codecs including G711A, G711U, GSM, G729,
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G726 - CORRECT 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
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security. - CORRECT ANSWER✔✔False
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, The log files of 3CX are never cleaned even when you restart the 3CX Services - CORRECT ANSWER✔✔False
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Once Secure SIP has been configured in 3CX, Secure SIP certificates will need to be deployed manually in
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phones and softphones OS so that they can communicate. - CORRECT ANSWER✔✔False
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Remote extensions may be provisioned using the HTTP or HTTPS URLs - CORRECT ANSWER✔✔False
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The default Voicemail PIN of an extension consist of 4 random alphanumerical characters. - CORRECT
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ANSWER✔✔False
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Your 3CX has only one SIP Trunk and receives a call from number 8135791691. If you have a "Inbound CID
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Reformatting" rule on the Trunk with "Source Pattern" 813(...)(.*) and "Replace Pattern" \1\2, the extension
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that receives the call will see "5791691" as the caller ID on its display. - CORRECT ANSWER✔✔True
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When 3CX has been installed without a FQDN from 3CX and in split DNS mode, the DNS server must not be
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installed on the same machine as the phone system. - CORRECT ANSWER✔✔True
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Your Local IP Phone loses the registration to 3CX and you want do troubleshoot the issue. You should start a
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Wireshark Capture on the 3CX Server, reboot the phone, and then apply the Filter
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sip.Cseq.Method==REGISTER in order to see if registrations are reaching 3CX - CORRECT ANSWER✔✔True
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Your 3CX has only one SIP Trunk and receives a call from number 422033272020 and you want it to be
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presented on the extension display as +44272020. You can do this with a "Inbound CID Reformatting" rule
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on the Trunk with "Source Pattern" 44(..)(..)(.*) and "Replace Pattern" +44\3. - CORRECT ANSWER✔✔True
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When selecting the option "I need a 3CX FQDN" an internal DNS is not mandatory - CORRECT ANSWER✔✔
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True