3CX Academy Advanced Certification 62 Questions with 100% Correct Answers Verified Latest, Exams of Nursing

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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 - ✔️✔️ True

2. The Virtual Extension of the slave must match the master side virtual

extension number - ✔️✔️ True

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. - ✔️✔️ False

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. - ✔️✔️ False

5. Wire shark can - without any additional Plugins Decode all Codecs

including G711A, G711U, GSM, G729, G726 - ✔️✔️ False

6. STUN extensions can be configured to connect to the tunnel port of

3CX instead of the SIP port for more security. - ✔️✔️ False

7. The log files of 3CX are never cleaned even when you restart the

3CX Services - ✔️✔️ False

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. - ✔️✔️ False

9. Remote extensions may be provisioned using the HTTP or HTTPS

URLs - ✔️✔️ False

10. The default Voicemail PIN of an extension consist of 4 random

alphanumerical characters. - ✔️✔️ False

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. - ✔️✔️ True

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. - ✔️✔️ True

13. Your Local IP Phone loses the registration to 3CX and you want do troubleshoot the issue. You should start a Wire shark 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

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. - ✔️✔️ True

15. When selecting the option "I need a 3CX FQDN" an internal

DNS is not mandatory - ✔️✔️ True

16. The order of "Inbound Rules" is not important when you have DID and CID "Inbound Rules", CIDs always have higher priority. -

✔️✔️ False

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. -

✔️✔️ False

18. You have run the 3CX "Firewall Checker" and come up as Green, but you still have audio issues and calls dropping on outbound

/ inbound calls. Can SIP ALG be the culprit? - ✔️✔️ True

19. An extension will be allowed up to 25 attempts (default) for authenticating successfully, after what it will be blacklisted for the

default blacklisting interval of 1800 minutes. - ✔️✔️ False

20. 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). - ✔️✔️ True

21. SRTP will secure calls so that a middle-man can't see the SIP

traffic in plain-text. - ✔️✔️ False

22. CID and DID "Inbound Rules" can both be configured to route

calls differently depending on the Office Hours. - ✔️✔️ True

23. "Prepend" will add digits to the end of the dialed number before

sending the call to the destination defined in the "Route" - ✔️✔️ False

24. Your Local IP Phone loses the Registration to 3CX and you want to troubleshoot the issue. You should start a Wire shark 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. - ✔️✔️ False

25. The "Server Activity Log" will provide information for: Phone Registrations, Gateway and SIP Trunk Interactions, All Related Calls

• ✔️✔️ True

26. Each extension gets a default password which is always the

same and should be changed for more safety. - ✔️✔️ False

27. You are debugging an audio issue using wire shark by analyzing the RTP streams. While using the RTP Stream analysis tools you see that the MAX Delta of packages from the Provider to 3CX is 8-- MS while the Max Delta for the reverse direction is 20 Ms.

The issue is located at the provider end and not 3CX end. - ✔️✔️ True

28. If you want to check 3CX routing of a call then only a Wire

shark capture is needed, - ✔️✔️ False

29. Knowing only the FQDN/port of 3CX and the MAC address of a

phone I could guess its provisioning URL. - ✔️✔️ False

30. An outbound call is routed through the VoIP Provider. This "Route" of the "Outbound Rule" has "Strip Digits" set as 0 and has no

values in the "Prepend" field. A user dials 004433272020. 3CX will

send the call to the provider exactly as dialed - ✔️✔️ True

31. You can use the same VoIP Provider in all of the Outgoing

Routes of a rule - ✔️✔️ True

32. If you want to decode audio in wire shark without any plugins,

your calls will need to be using either G711A or G711U - ✔️✔️ True

33. If you want to check the internal PBX routing of a call, the most reliable way is through the use of the Binary Log Viewer, or which you must know some information about the call you are investigating, like

the Caller ID, the time of the call, etc. - ✔️✔️ True

34. Assume the following scenario: 3CX is connected via a site-to- site VPN with two different buildings where remote phones have been provisioned. 3CX is on network 192.168.9.xxx, Phones on location A are on network 192.168.3.xxx, Phones on location B are on network 192.168.8.xxx. When a call is established, between an extension on remote location A to an extension to remote location B, by default 3CX will proxy the SIP and audio traffic and send it to the extensions

• ✔️✔️ True

35. Assume the following scenario: 2 Phone Systems bridged over a site-to-site VPN connection. Phone system A on network 192.168.9.xxx, Phone System B on network 192.168.3.xxx. The options "Supports Re-Invite" and "Supports Re-places" are enabled on the bridge settings. When a call is established between an extension from PBX A to an extension behind PBX B, the audio will

be exchanged directly between the 2 extensions. - ✔️✔️ False

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 wire shark - ✔️✔️ False

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 - ✔️✔️ True

38. A TLS certificate and key will have to be imported into 3CX so

that SRTP can be used. - ✔️✔️ False

39. You cannot create multiple CID "Inbound Rules" and associate

them with different SIP Trunks you have in 3CX. - ✔️✔️ False

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). - ✔️✔️ True

41. SRTP will secure calls so that a middle-man can't see the SIP

traffic in plain-text. - ✔️✔️ False

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. - ✔️✔️ False

43) The default Blacklist time interval is of 1800 minutes. - ✔️✔️ True

44. When an "Outbound Rule" has an extension group defined, outgoing calls from the conference extension are able to be made

from 3CX - ✔️✔️ False

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. -

✔️✔️ False

46. "Inbound CID Reformatting" can be used to change the Caller

ID name of an incoming call based on a set of rules. - ✔️✔️ False

47. The "Server Activity Log" will provide information for: Phone Registrations, Gateway and SIP Trunk Interactions, All Related Calls

• ✔️✔️ True

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 -

✔️✔️ False

49. When viewing in wire shark 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 - ✔️✔️ False

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. - ✔️✔️ False

51. The default Voicemail PIN of an extension consist of 4 random

alphanumerical characters. - ✔️✔️ False

52. In order to check which side (Caller or Calee) terminated the call first, you can check using wire shark to see who sent the first

BYE message. - ✔️✔️ True

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 wire shark, replicate the issue and then Restart all 3CX Services, generate the support files and send them to

3CX Support for troubleshooting - ✔️✔️ False

54. Setting a Name when creating a "CID Inbound Rule" is

mandatory - ✔️✔️ False

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. - ✔️✔️ False

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 - ✔️✔️ False

57. You have run the 3CX "Firewall Checker" and come up as Green, but you still have audio issues and calls dropping on outbound

/ inbound calls. Can SIP ALG be the culprit? - ✔️✔️ True

58. Remote presence of a bridged system is available in both IP

Phones (via BLF) and the 3CX Phone for Windows - ✔️✔️ False

59. The numbering plan of bridged systems must be different in

order for outgoing calls to the bridge to work - ✔️✔️ False

60. ZRTP and SRTP are both supported to secure the audio

stream of calls within the 3CX Phone System. - ✔️✔️ False

61. The 3CX Instance Manager is available for 3CX v16+ installs

on what Operating System? - ✔️✔️ Linux x86 with no failover or

hosting mode enabled

62. The 3CX Instance Manager allows you to perform batch updates -

✔️✔️ True