3CX Academy Advanced Certification | 62 Questions with 100% Correct Answers | Verified | L, Exams of Advanced Computer Programming

Download 3CX Academy Advanced Certification | 62 Questions with 100% Correct Answers | Verified | L and more Exams Advanced Computer Programming in PDF only on Docsity! 3CX Academy Advanced Certification | 62 Questions with 100% Correct Answers | Verified | Latest Update 1) In the criteria of the "Outbound Rules", "Calls from Extension(s)" having comma separated values will allow multiple extension ranges to be defined - ✔✔️T️rue 2) The Virtual Extension of the slave must match the master side virtual extension number - ✔✔️T️rue 3) 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. - ✔✔️F️alse 4) On outbound calls to external numbers, 3CX will process "Outbound Rules" in a "Best Matching" way, depending on how many of the criteria match. - ✔✔️F️alse 5) Wireshark can - without any additional Plugins Decode all Codecs including G711A, G711U, GSM, G729, G726 - ✔✔️F️alse 6) STUN extensions can be configured to connect to the tunnel port of 3CX instead of the SIP port for more security. - ✔✔️F️alse 7) The log files of 3CX are never cleaned even when you restart the 3CX Services - ✔✔️F️alse 8) 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. - ✔✔️F️alse 9) Remote extensions may be provisioned using the HTTP or HTTPS URLs - ✔✔️F️alse 10) The default Voicemail PIN of an extension consist of 4 random alphanumerical characters. - ✔✔️F️alse 11) 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. - ✔✔️T️rue 12) 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. - ✔✔️T️rue 13) 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 - ✔✔️T️rue 14) 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. - ✔✔️T️rue 15) When selecting the option "I need a 3CX FQDN" an internal DNS is not mandatory - ✔✔️T️rue 16) The order of "Inbound Rules" is not important when you have DID and CID "Inbound Rules", CIDs always have higher priority. - ✔✔️F️alse 17) 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. - ✔✔️F️alse 18) 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? - ✔✔️T️rue an extension behind PBX B, the audio will be exchanged directly between the 2 extensions. - ✔✔️F️alse 36) When an established call from your local extension to an external number is terminated from your IP Phone you should see a BYE being send in from the Provider / PSTN gateway, towards your PBX IP address in wireshark - ✔✔️F️alse 37) When 3CX has been installed without an FQDN from 3CX and in split DNS mode, the DNS server must not be installed on the same machine as the phone system - ✔✔️T️rue 38) A TLS certificate and key will have to be imported into 3CX so taht SRTP can be used. - ✔✔️F️alse 39) You cannot create multiple CID "Inbound Rules" and associate them with different SIP Trunks you have in 3CX. - ✔✔️F️alse 40) 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). - ✔✔️T️rue 41) SRTP will secure calls so that a middle-man can't see the SIP traffic in plain-text. - ✔✔️F️alse 42) If a caller enters the PIN of the voicemail of an extension incorrectly 3 times, the specific voice mail account gets blocked for 2 minutes. - ✔✔️F️alse 43) The default Blacklist time interval is of 1800 minutes. - ✔✔️T️rue 44) When an "Outbound Rule" has an extension group defined, outgoing calls from the conference extension are able to be made from 3CX - ✔✔️F️alse 45) You have a Mater Bridge with 4-digit extensions 1xxx and a Slave Bridge with 4-digit extensions 2xxx. In the "Outbound Rules" you use to route calls across the bridge, using a prefix is mandatory. - ✔✔️F️alse 46) "Inbound CID Reformatting" can be used to change teh Caller ID name of an incoming call based on a set of rules. - ✔✔️F️alse 47) The "Server Activity Log" will provide information for: Phone Registrations, Gateway and SIP Trunk Interactions, All Related Calls - ✔✔️T️rue 48) If you are having audio issues with calls between internal local extensions and your firewall checker fails the first thing that you should do is to make sure that your firewall checker test passes - ✔✔️F️alse 49) When viewing in wireshark a Remote Extension via STUN registering to your 3CX, you should see in the SIP section of the Registration message in the "Contact" field the Local IP address of the remote phone - ✔✔️F️alse 50) If a site-to-site VPN is already in place between the PBX location and a remote location, phones should be provisioned with Direct/STUN provisioning method. - ✔✔️F️alse 51) The default Voicemail PIN of an extension consist of 4 random alphanumerical characters. - ✔✔️F️alse 52) In order to check which side (Caller or Calee) terminated the call first, you can check using wireshark to see who sent the first BYE message. - ✔✔️T️rue 53) You are having an issue with incoming call routing being sent to the wrong internal destination once it is received by 3CX. The first step to troubleshoot the issue would be to set your System to Verbose Logging, start wireshark, replicate the issue and then Restart all 3CX Services, generate the support files and send them to 3CX Support for troubleshooting - ✔✔️F️alse 54) Setting a Name when creating a "CID Inbound Rule" is mandatory - ✔✔️F️alse 55) When the option "Remote PBX uses SBC/Tunnel Connection" is enabled on the master bridge, the Slabe bridge must be registered behind the SBC. - ✔✔️F️alse 56) You can take a phone that has already been provisioned with RPS as remote STUN Extension and configure it as a Local LAN extension, as long as 2 weeks have passed since the phone was provisioned as a STUN extension - ✔✔️F️alse 57) 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? - ✔✔️T️rue 58) Remote presence of a bridged system is available in both IP Phones (via BLF) and the 3CX Phone for Windows - ✔✔️F️alse 59) The numbering plan of bridged systems must be different in order for outgoing calls to the bridge to work - ✔✔️F️alse 60) ZRTP and SRTP are both supported to secure the audio stream of calls within the 3CX Phone System. - ✔✔️F️alse 61) The 3CX Instance Manager is available for 3CX v16+ installs on what Operating System? - ✔✔️L️inux x86 with no failover or hosting mode enabled 62) The 3CX Instance Manager allows you to perform batch updates - ✔✔️T️rue