V20 Twilio Registration failing in logs despite calls working?

[lightspeedhosting]

I have our first V20 installation installed on VM (Vultr) and I am seeing odd behavior we have never seen with V18.

1) The Phones are Yealink T54W SIP router phones connecting directly to 3CX, that's working as expected.
2) The Twilio trunk in 3CX show it's not registering even though I can make calls IN and OUT...
3) The logs are filled with the following message every 4-5 minutes.

Registration at Twilio Voice Trunk has failed. Destination (sip:54.172.60.2:5060;lr) is not reachable, DNS error resolving FQDN, or service is not available.

Even though, from the 3CX server it self I can ping all the appropriate IPs, and I can ping the FQDN we're using for the trunk. If the registration was failing because the IP access list or the credentials list were incorrect then I wouldn't able to make calls out, so I am puzzled. lol

 

[OlegR_3CX]

Hi there.
This trunk is no longer supported from our end.
It can be a networking issues there between the sides, and maybe it is even happening time to time.
You could run the traces and filter with the IPs to confirm this matter, and then take it further and get in touch with your trunk provider as well as hosting support.

 

[lightspeedhosting]

I will follow up with Twilio. But honestly it seems odd that 3CX doesn't support one of the largest SIP providers in the world lol... Why is it even an option then?

 

[OlegR_3CX]

We used to, but not anymore. Why not choosing one of the one you can see here ?

 

[lightspeedhosting]

Twilio is in the list you sent under “worldwide”

 

[OlegR_3CX]

You are right, and I am sorry for my reply above as I have confused your trunk to something else and misguide you there.
To in your case you can use my advice on the troubleshooting and steps will be the same.

 

[lightspeedhosting]

I’ve already completed traces, pings etc. This was stated in my post. I am not seeing any detectable results that indicate what 3CX is telling me is happening, is actually happening.

 

[OlegR_3CX]

Can you please open the ticket with us so we can take it from there

 

[lightspeedhosting]

Thanks, just created ticket.