Upgrading version 15.5 to v16 - SIP Trunk Not Registering

[Michael.S]

Hi All,

I tried upgrading 3cx yesterday and ran into a strange issue. The SIP trunks do not register at all. After troubleshooting further i couldn't get it to work no matter what I tried. Even recreating the trunk (the credentials are correct).

I tested reverting to the previous 15.5 version, and the SIP trunk registers instantly and can make calls without issues. Any thoughts as to why it won't register under v16?

 

[AWS2P]

you should post in the following of this post as it is same problem
https://www.3cx.com/community/threads/sip-trunk-not-registering-or-attempting-registration.75763/