Hello all. I have a BCM450 R5 with a R1 Capacity Expansion Card. The BCM has 5 PRIs with 2 different carriers. 2 are for local use only with one carrier, and the other 3 are for long distance with another carrier. My question is how should the clocking be set on the 5 cards? I currently have the 1st long distance card set as "Primary External", the 2nd long distance as "Secondary External", the 3rd long distance as "Internal", and the 2 local PRIs set as "Internal". The agents in the call center seem to be getting random "fast busys" when they are dialing out (whether local or long distance), and I'm assuming it's a clocking issue. The callers sometimes get a fast busy 3 or 4 times in a row before the call finally goes through. The funny thing is that the fast busys seem to get bad at random times, and then they almost go completely away at other times. As far as I can see, I can only have 1 card set to "Primary External", and one set to "Secondary External". Is this correct? Do I need to have one of the carriers change their clocking? Also, Should the "Internal CSU" be set to "On" or "Off"? Any help would be greatly appreciated. This BCM hasn't worked right since I installed it a month ago! Thanks again!