What kind of devices are you using my friend.
Since it is a campus point to point connection then you should be having two wireless access points/routers operating in WDS mode. Assuming you do not have radio signal detection equipment I advice you to download Chanalyzer Pro...Google it.....or anything from wisegeek.com.
Your RSSI should not go below -80dBm for a pretty good connection. The best signal you can get is around -48dBm.