Hi,I believe your configuration is incorrect, please try the following:MWIs: (ephone-dn NOT dial-peers)ephone-dn 100 number 8000... mwi onephone-dn 101 number 8001... mwi offNow apply dial-peers to the CUE:dial-peer voice 80 voip description *** MWI ...

by any chance, is the extension you are trying to forward to has already forwarded to your extension ?This gives a loop, and cucm prevents you from doing this.however, with all my respect, the message might be generated in dutch !

Hi,Please go to your IPC, click on Menu (button next to the minimize button - on top right), go to preferences, go to Network, then check under device name which network card from your pc the IPC is using.then double check if this is the correct conf...

Hi Koen,What you're missing is the CSS under the Directory Number Forwarding section.Go to the extension you're testing on, and next to the field: Forward all, select the appropriate CSS.This ensures you can forward all calls to this extension to you...

If none of the above worked, simply try to delete the phone and the user's profile + directory number, and start again.I faced similar issue once and nothing could solve it except what i just mentioned.good luck