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

Have you tried a different line port in case the line 2 port is bad?You can dial access a line by dialing 70x example line 3 would be 703.

Also, check your programming in MMC 601. Make sure that line group 9 has line 702 programmed in it. Also check your wiring. I believe that line two is the orange / white pair. I am amazed they had a telephone system with only one line.

Thanks for the replies, I ended up buying a manual and checking programming on trunk 702 line 2. Everything was ok, it turned out to be a bad port in the control unit and I moved it to position 3. Yeah it was hard to believe the customer had this system for about 10 years with only one line on it.

Just curious, If only one line was installed wonder how line 2 went bad?