I must be missing something here because I am getting 61-4 errors when I fire up an MICS with 6.0 or another MICS with T1/R1. I have a 2 port fiber exansion module in slot 2 of the MICS and have the two DID tunk cards in a 12x0 module connected to the top fiber connection. I sometimes also get 51 or 53 errors. Since 2 different systems are doing the same thing I must be doing something wrong, what could it be?