If it has the auto attendant feature enabled it will say that on the main programming menu screen as ATT as an option.Without that then it won't.It may be that the memory has totally defaulted from bering mothballed and you lost the download.
Are you saying that you cannot make outgoing calls?That may be because you are using trunk group keys and not all the trunks are active so you're picking up a "dead" member of the trunk group.You can assign direct keys to the sets for the lines or try dial accessing 9001,9002 etc.If you don't have the auto attendant option loaded then you should program the ringing on the sets that you want to ring.