For some reason we have begun dropping calls. Our PRI comes into a 2651 XM/V. This only happens on calls to or from the outside world, which is why I believe its at the router instead of in CCM. I get a "Lost Communication with Remote" on Serial 0/0:23 pretty regular and didn't know if that had anything to do with it. We've never had this problem up until last week. I don't know what it could be other than the PRI because we didn't make any changes to the router. Any help is appreciated.