3CX Academy Advanced Certification | 62 Questions with 100% Correct Answers | Verified | Latest Update | Verified (Graded A+) 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 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 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
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 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
