Hi Aram,
The info you have posted there will also make the telephone extension unavailable for normal internal or even direct incoming calls to.... so that wouldnt be a good thing if they wanted to receive normal calls but didnt want to receive calls from the MERg...
So its an enable disable ringing for the extension that is in the MERg is what Russell and a lot of other people would be after if at all possible.
Regards
Kevin