Notes for the upgrade to UBU 20 in Jan 2022 as I remember them – details are in the asterisk reinstall afresh Asterisk MOH relies on the icecast server running. The MOH config file will need updating for UBU 20 The two servers PRIMO and UBU20 use two different ports for the ice cast server- check that the various files that contain references to ports 8000 or 7000 are updated