"You want to restrict the DN from being able to initiate calls?"
Precisely... A phone in a public location is only to be used when allowed by staff. We are looking for a way to allow the staff to turn on/off this phone via a softkey on another phone.
When on, full use of the phone is available.
When off, the phone cannot make/receive calls.
we would like this this on/off to be controlled from another phone, not a sysadmin.