I have either no internet service or very slow internet over most of our network. Everything was working well until recently. We have a fractured T1 line with a Netopia r5300 router. We have 2 Win2000 Servers (One is data/One is a Citrix Server) and a WinNT4.0 (Exchange & Domain). T1 provider has done tests that show the problem is probably not theirs. On the Citrix server the internet is up most of the time. The other servers and all workstations (about 40) have the internet occasionally, however, it works for a moment and then nothing. Even when it is working it is much slower that usual. You can ping the gateway from anywhere, but if you try to ping a website, sometimes yes, sometimes no (once again from everywhere but the Citrix server). Everything runs through two SMC 24 port switches. I have switched the router to different ports on each switch with no luck. There seems to be no other network traffic issues. Also, I have scanned for viruses and there was a couple on 2 workstations but they have been removed.