We have a CCM 4.1(3) system that's been in place for over 3 years now. The last few weeks I've been getting complaints of static on calls and this past weekend I was getting complaints of dropped calls. We have 5 PRIs going into 2 6608 blades in 2 different core switches. What is the best way to figure out where in the world that static is coming from??? Save me!!! Thanks!