Static IP Configuration

We have a /29 static IP configuration.  The access from our dynamic IP segment and from the outside world occasionally times out to the static IP addresses.  This lasts for a period of a few minutes, and then access seems to work fine for a while.  The problem was much worse when we had a server assigned to one of the static ip addresses which was regularly accessing addresses on the dynamic IP segment.  Moving that server to one of the dynamic ip addresses reduced the frequency of the problem, but it still occurs on a fairly regular basis.  I'm wondering if there is a better router than the DPC3941 for handling the static ip configuration.