How about creating an outbound rule to test the trunk first. Create a new outbound rule select calls from extensions and choose the extension you are calling from. Select your route and click ok.
does that work?
Do inbound calls work?
Have a look at the 3CX Activity log right after a failed call. Post the log of the call here if you're not sure what it is telling you.
Does you provider show as registered in 3CX? It may be the outbound rules, but it might also be something else, the log should show that.
That is not showing a lot. The Activity log should show everything (you can set how much information you want to see), from when the number is dialled (digits are received) to when the call is abandoned/fails.
I don`t have this menu, but I found activity log:
12/19/2016 12:13:09 PM - [CM503003]: Call(C:10): Call to <sip:[email protected]:5060> has failed; Cause: 408 Request Timeout/INVITE from local
12/19/2016 12:03:13 PM - [CM306001]: Address of STUN server (stun2.3cx.com) could not be resolved!
The second log may indicate a problem if you don't have a static public IP and use STUN. You may have to investigate that further.
The first log confirms the call failed. You may need some additional information about what "timed out" and why.
Are you able to receive incoming calls from this provider? Is there additional information (more of that log), about what IP timed out? Did the Invite get to the provider, or were they not able to send a response back for some reason?
Have you run the 3CX Firewall Checker with success? In other words, are all required ports open (forwarded)?
The use of a dynamic IP is discouraged, to say the least, from version 14 forward. Not to say that it won't work with some tweaking, however i can't speak with personal experience for version 15. You would have to have STUN working correctly for your set up. That may explain your problem, but, you haven't answered my question about being able to receive calls. It you can't receive calls they the public IP that your provider is attempting to reach you at, may be out of date.
If I try to call inside, no matter, which IP-address I'm using, right? And this IP is statuc until router reboot, may be longer. I don't know can I accept incoming calls, but in the first, I want make outgoing call, can you help me, please?
Have you verified that you have the right format for the Sip Trunk? I know with my provider I had to use 11 digits. So for a 7 digit outbound route I had to add 1555 in the Prepend area of the box.
I changed to 11 - no result:
12/20/2016 11:17:52 AM - Call to T:Line:10000>>88312155555@[Dev:sip:+78312470058%[email protected]:5060;transport=TCP] from L:1.1[Extn:001] failed, cause: Cause: 408 Request Timeout/INVITE from local 12/20/2016 11:17:52 AM - [CM503003]: Call(C:1): Call to <sip:[email protected]:5060> has failed; Cause: 408 Request Timeout/INVITE from local
What registration method are you using with your provider IP-Base or Authentication-Base.
Then create a basic inbound rule and try to call to your sip number through mobile or other number.