Solved SIP Trunk not registering

[WebMediafields]

Our sip trunk is not registering and is not showing registration sent, failed or succeeded times. It did this before and was something to do with DNS resolution but i can't see that in wireshark this time. I've tried restarting the sip server, changing the sip to use IPv4 only. Don't know if it's related but we did update to the latest 3CX version last night.

 

[Alphabetic]

What happens if you use IP address instead of FQDN?

 

[WebMediafields]

It fails with the IP. I've tried this on the same sip provider on a different server that is registering and it fails on the IP on that system even though it's working with the FQDN

 

[JohnS_3CX]

Hello,

We released an update that addresses this issue. Please check your updates section and install it from there.

 

[WebMediafields]

Hello,

We released an update that addresses this issue. Please check your updates section and install it from there.

We have the latest update, it was installed on the system last night.

 

[AWS2P]

Don't know if it's related but we did update to the latest 3CX version last night.

@JohnS_3CX Hello, it seems they already apply latest

 

[AWS2P]

did you try a complete reboot of PBX ? is it local or cloud?

On one pbx on premise on windows 10 , i got trunk registred green but not working at all, i've been in touch with sip provider support and they said public IP seen from PBX stay 0.0.0.0. on their side instead of real Public one. They cleared their cache and registration worked since.

 

[WebMediafields]

did you try a complete reboot of PBX ? is it local or cloud?

It's hosted locally, i've tried rebooting the physical server a couple of times but no change.

 

[JohnS_3CX]

Please read this post and provide all the relevant information so we can take a look at it:
https://www.3cx.com/community/threads/information-to-provide-when-requesting-help.67558/

 

[WebMediafields]

• Please read this post and provide all the relevant information so we can take a look at it:
  https://www.3cx.com/community/threads/information-to-provide-when-requesting-help.67558/

  • 3CX Version, Enterprise Annual 16.0.655
  • Server OS, Windows Server 2019 Standard
  • Is the 3CX Server Hosted and where? Local Server
  • Provisioning Method: Local
  • Trunk Provider or Gateway Make/Model, Orbtalk
  • Has the Firewall Checker passed: YES
  • Are custom Phone Templates being used: NO

 

[AWS2P]

your trunk use SIP FQDN or IP to register?
Did you take care about IPV4 only?
on trunk but also on NIC settings?

 

[JohnS_3CX]

Just a friendly reminder to all, keep your PBX on a dedicated 3CX machine or VM and only have the NICs needed by the PBX