What i did was use an analog station looped (601 ), to a line port.let's say 806, I then put line 806 into call coverage group 779 , overflow to voice-mail, using Attendant 2 after announcement to disconnect, when i'm ready to close the parts dept, I forward call to station 601. It's play the parts dept is closed ,while sale is open which they forward to 600 att 1