I have a customer that just added a 2nd line to his Compact DCS. I have dialtone at the 66 block and the line button is programmed. I cannot get dialtone by pushing line button or by dialing 9 on any extension. Line 1 works fine. Display says something like trunk out of service (don't remember exact message) I have programming manual but don't see anything pertaining to this type of trouble. Wondering if this line could be in an oos maintenance condition. I don't normally work on Samsung, just trying to help a friend. Thanks