We quite frequently use a PTP450i master to talk to a PTP450 slave and it has worked fine. Done mostly when we do not have a 48 volt source on slave site yet and or limited space. The other day due to a planned future update I tried to link a PTP450i slave to a PTP450 master. They would link but not pass traffic. I tried 15.0.3 and 15.1 on them. Is there a reason for this?
This is not a supported configuration.
But the PTP450i to PTP450 non-i is? It works anyway and works well.