3CX Academy, Advanced Certification ACTUAL EXAM COMPLETE 150 QUESTIONS WITH DETAILED ANSWERS /

3CX Academy, Advanced
Certification ACTUAL EXAM COMPLETE 150
QUESTIONS WITH DETAILED ANSWERS /




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

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. - ANSWER True

When selecting the option "I need a 3CX FQDN" an internal DNS is not mandatory -
ANSWER True

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

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? - ANSWER True

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. - ANSWER False

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). -
ANSWER True

SRTP will secure calls so that a middle-man can't see the SIP traffic in plain-text. -
ANSWER False

CID and DID "Inbound Rules" can both be configured to route calls differently
depending on the Office Hours. - ANSWER True

"Prepend" will add digits to the end of the dialed number before sending hte call to
the destination defined in the "Route" - ANSWER False