Is there any way of stopping certain numbers being dialled? Basically I do not want the others that use VOIP software and hardware to be able to dial any Mobile or Premium service numbers (In Australia thats numbers starting with 04 for mobiles and 1900/1902 for premium). I tried doing this with an outbound rule but that didn't seem to work. I am happy if it would just redirect the call to a digital receptionist extension or something that just says that the call cannot be made but can't work out how to do this. Also with my VOIP provider I need to dial the 2 digit area code before the phone number which I don't need to on the PSTN line unless it is interstate. Is there anyway to configure the phone system to automatically put that area code for all calls made in automatically? Also I would only want it for phone numbers starting with 5-9 as I still occasionally use it to call interstate which would require a 0x area code.