I have a BCM 50 2.0 that I am trying to set up DISA on. I have a PRI T1 and the target lines I have set up all work. My DISA DN is not a target line and I have entered the DN in the Public DISA DN field. When I dial it, I get a "all circuits busy" message. If I move the dn to a target line, works ok. Any idea as to what I am doing wrong? Thanks.