We have recently installed an 801 ISDN router.....using the Fast Start utility to configure.....we have 3 PC's and the router on a small LAN, the router is set-up to connect to an ISP and provide Internet access for the PC's.....we can start IE on the PC's and connect to various sites with no problems, after approx. 2 minutes the IE "sessions" begin getting the "Unable to connect to site etc..." msg.....if we wait for a few minutes the sessions appear to restart....???? During this time we are unable to ping across the ISDN.....both the LAN and ISDN Channel lights remain lit and occasionally the RX and TX lights on both light to indicate some sort of activity......???? Any ideas.....????