You need to go into the terminals and sets, set 37, prime line, of the programming and see if DN 37 has access to a line pool. If not, you need to give it access to whichever pool the rest of the folks are using to get out on. I'd also go into the system programming section under access codes and make sure that the access code set up on pool A is 9. This location could conceivably be using any of the other line pools but I've mostly encountered CICS systems that use pool A since it's the first and it just doesnt make sense to use any of the others first. This will tell you if the pool has been programmed. Of course, they may not be programmed to use a pool at all depending on how the lines are programmed (i.e. each person could have their own dedicated line), but this is not probable unless there's only a few phones on the switch. You could always go look at line 1 and see if it's programmed as line type pool A or public. I would check all of the lines to be sure. If they're programmed as public, then you might need to get them to let you assign one of the lines (the lowest one is the one I'd suggest...such as line 7 or 8) as Pool A and then make sure you set the access code for pool A to 9 as explained above. Then you would need to assign pool A as the prime line in the set programming for DN 37 under the terminals and sets section of programming. Good luck.
Nicholas Platt
AT&T Global Business Systems Southeast