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3CX Phone System for Windows System for Windows
Page 27
If the phone is listed as ‘Not registered’ then the extension has been created, but the
phone has not registered itself with the system. This could be because the device is off,
or because the SIP credentials are incorrect. Check whether you have entered the
Extension Number, Authentication ID and Authentication Password in the right fields
Another cause could be that you have a firewall enabled on the machine running 3CX
Phone System and that it is blocking communications between the server and the phone.
2. Place a call to another extension
If the status shows that the phones have registered correctly, you can make a call to
another extension. The status monitor will show that you picked up one extension and are
calling another.
3. Troubleshooting tips
If dialling another extension does not work, click on the Activity Log node. This screen
shows the activity log of the server, and the log messages can indicate the reason of an
error condition. For more information about the server status log, visit http://wiki.3cx.com.
Screenshot 6 - 3CX Phone System Activity Log
Forwarding rules - extension behaviour on busy, no answer etc.
Using the forwarding rules feature, you can configure exactly what should happen to calls
when an extension is busy, a call remains unanswered or when an extension is
unregistered. You can also make forwarding rules based on the time that the call was
received and the caller ID of the caller.