I do not want to route calls from the attendant to ext. 10 or 11 when the caller presses 0...can I assign a calling group to the 0...alternatively can I just assign a selector code to a calling group...I have tried the selector code and it only lets me assign it to one extension or "direct extension tranfer" (i.e., using selector code 9 it will not except 1, which defines my calling group 1)