You are using multiple phones mapped to the same incoming extension number and not a call group?
Yes, I did so. Now I'm using a call group.
...and the system uses 20 seconds instead of the phone's settings?
Yes, it did so.
To fix this, we should set the ring length for those extensions to the longest setting in the chose phones. Is that what you're looking for?
Or setting to the shortest configured ring length. It isn't urgently, but it is a bug.
