I doubt that this can be done, but is it possible to have presence for parking?
Example
I am using Grandstream gxp-2000 phones and they have 8 extentions on the side. The sip phones of course have presence and show when a user is on the phone. MY question is this. IS iit possible to have extention 71-74 show when there is a caller in park? I have these evil woman breathing down my neck because their old 1986 premier phone system was able to do that.
thanks