As I understand it this is a very vendor specific feature. I would suggest that you test the "Alert" part by attaching it to an alert that you know works - like disk space free < 99 % just to make sure that the alert acutally fires..
Other alerts actually fires.
We have enabled the option on BIOS (Chassis intrusion) but the alret is not send.
Not sure if this will matter or not, but do you have an OMCI client installed on the Dell 780?
it is not installed
I suspect that it needs it in order to even know about the chasis intrusion stuff. You might wanna try installing that on a device. Test it out.