Titel (almost) says it all: how does one setup a custom ringtone for a Yealink phone in 3cx v20 pro.
I understand that it would most likely imply a custom template but I can't seem to find a relevant reference doc ?
I have just taken a over a small install with 6 T48S phone & 3cx cloud hosted. Everything works fine "as is" except I can't seem to be able to add another phone into the setup.
There is NO sbc - direct connect (I know this is not recommended setup but it has worked for them for the past 4 years from v18 to current v20u8).
The phone has lattest firmware, factory reset. I gets the provisioning info from the PBX (On the 3cx side I get Provisioning file for MAC 805EC0A**** of user 859 requested by 85.*.*.* was successfully generated and the various account fields are populated correctly in the web interface) but it never registers - on the phone side it alternates between "registering" and "registration failed". I can't seem to find more logging as of what is failing on either side (might welcome advices as of what to enable).
Any help most welcome - muss be a pretty easy one...