(usr-tc) D Channel Problem

I just installed our seventh Hiper DSP card into our chassis and the Loopback/D-Alarm LED on this card keeps alternating between green and red about every 30 seconds. I have this card set up exactly like the other cards in this chassis and the telco (supposedly) has this span setup the same way as all of our others. Does anyone have any insight into what could be going on? Here are my specs: T1 PRI Hiper DSP 2.0.81 Hiper ARC 4.1.59-6 Hiper NMC 6.1.17 Thanks in advance. - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.