I am having trouble isolating a packet bus alarm in my port network 2. The TN771D Maintenance Card is in reconfig. I have replaced this card, ensured the vintages match on all equipment that is duplicated, reseated all the TDM Bus cables, and replaced the bus terminator. This is a hospital, so I hate to shut down the cabinete, but if need be I will start shuting down carriers and moving the terminator until the alarm resets just to ID what carrier it's in. I was hoping to find an easier way to ferret it out. Any Ideas? It's a G3SI V11 with duplicate processors