I was wondering if any one else has run into this. I am running CCM 4.3 and a 2821 with analog FXS ports (MGCP) on it. I built an FXS port with a DN on it. Got dial tone, no problem. I can call into and out of the port from an MGCP PRI. The installation has 7910, 7940-60 phones. From the 7910 phones I can call into the analog port fine. But if I call the analog DN from a 7940, I get a fast busy. All the DN's are in the same PT and that PT is in EVERY CSS. The 7910 and the 7940's are in the same CSS, same subnet, same switch. If I put the same DN/PT on a CTI Route Point, the 7940 can call it. It seems to be an issue from the 7940 phones to the 2821 FXS port. Believe me, if I hadn't seen it, I wouldn't believe it.