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3CX Academy, Advanced Certification
Questions with Detailed Verified Answers
In the criteria of the "Outbound Rules", "Calls from Extension(s)" having
comma separated values will allow multiple extension ranges to be
defined Ans: True
The Virtual Extension of the slave must match the master side virtual
extension number Ans: 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. Ans: 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. Ans: False
Wireshark can - without any additional Plugins Decode all Codecs
including G711A, G711U, GSM, G729, G726 Ans: False
STUN extensions can be configured to connect to the tunnel port of 3CX
instead of the SIP port for more security. Ans: False
The log files of 3CX are never cleaned even when you restart the 3CX
Services Ans: 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. Ans: False
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Remote extensions may be provisioned using the HTTP or HTTPS URLs
Ans: False
The default Voicemail PIN of an extension consist of 4 random
alphanumerical characters. Ans: 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. Ans: 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. Ans: 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 Ans: 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. Ans: True
When selecting the option "I need a 3CX FQDN" an internal DNS is not
mandatory Ans: True
The order of "Inbound Rules" is not important when you have DID and
CID "Inbound Rules", CIDs always have higher priority. Ans: 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. Ans: False
3CX Academy, Advanced Certification
Questions with Detailed Verified Answers
In the criteria of the "Outbound Rules", "Calls from Extension(s)" having
comma separated values will allow multiple extension ranges to be
defined Ans: True
The Virtual Extension of the slave must match the master side virtual
extension number Ans: 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. Ans: 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. Ans: False
Wireshark can - without any additional Plugins Decode all Codecs
including G711A, G711U, GSM, G729, G726 Ans: False
STUN extensions can be configured to connect to the tunnel port of 3CX
instead of the SIP port for more security. Ans: False
The log files of 3CX are never cleaned even when you restart the 3CX
Services Ans: 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. Ans: False
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Remote extensions may be provisioned using the HTTP or HTTPS URLs
Ans: False
The default Voicemail PIN of an extension consist of 4 random
alphanumerical characters. Ans: 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. Ans: 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. Ans: 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 Ans: 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. Ans: True
When selecting the option "I need a 3CX FQDN" an internal DNS is not
mandatory Ans: True
The order of "Inbound Rules" is not important when you have DID and
CID "Inbound Rules", CIDs always have higher priority. Ans: 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. Ans: False
