47-12 dial digit 0 = action =Unscreened transfer destination = 250
15-07 next available button > function= *03 virtual extension > additional data=250
15-07 next available button > function = 77 Inskin Voicemail > additional data = 250
15-09 check the function key that has the virtual 250 on it for every extension to ring
Create a virtual Extension.
Point 0 to 250
find available hot buttons on each extension
create a ring
record a greeting on 250