Anyone know if you can make a key Outgoing Only. I have a customer that is going to have someone just sit and cold call. They do not want anyone to be able to call this extension for any reason even if someone in the building knows the extension. Right now I was thinking of building a 500 set as the marp for the extension and just hard call forward it to a extension that does not exist. That way if someone did try to call it athey would get a reorder tone. Does anyone know of another way to do this?