Nothing has changed in this regards from v5 to v5.1
And, subscription for DNS SRV is something completely new for me. Can you please point it out where have you found such option? Which RFC?
Hi Archie, well I know that when I first looked at 3cx in November last year, version 3.1 didnt support DNS SRV, but when version 5 came out I notice it did. I only know his from the logs at he VOIP provider. So just to show you i've loaded up version 5 onto a second machine, see below the two logs of version 5 and version 5.1 which clearly show. Maybe 3cx is unwitingly supporting SRV in version 5.0 without you knowing.
Loggin status from voip provider.
Platform Address Contact URI Expires Weight Seq Useragent