Having problems with a Vodavi STSE prib card. Put new replacement in, but having trouble. LEC has a Adtran 904, which patches to our Adtran Ace, then into pri card.

When set to pri, all light stay lit. When set to T1, all light extinguish but #3 (loopback). LEC says they do not have their csu in loopback.

We have clocking turned on, and dip switches 1,2 on & 3,4 off.

Can anyone point me in the right direction??