The entire network Slows Down when anyone does a download from the internet

Hbcani — Thu, 15 Jan 2009 21:05:49 +0000

I have a full T1 line from AT&T that they continually test as good. There are (3) companys on the same T1
My company has a Windows 2003 Domain, (3) servers (Exchange 2003, Connectwise and a Citrix server). On average I have 5 users on my network. But the problem occurs even if there is only one user here.
Company 2 has two servers that are used remotely using Real VNC for access. These two servers are on their own workgroup and not part of my Domain. They usually have 1 or 2 users online at any given time. On weekends they have no one online but the problem still occurs.
Company 3 has a Windows 2003 Domain, (3) servers, (Exchange 2003 server, Raiser Edge Database server and a Citrix access Essential Server). This company regularly has 6 users accessing the Exhange and Raisers Edge via the Citrix.
If any of my in-house people does a download from the internet Company 3 suffers severe throughput issues to the point of waiting for keystrokes to appear after typing.
I am told by AT&T that the T1 line is good and working properly though it should support the number of users I have easily. I recently added a Comcast Business line and put Company 3 on the T1 by itself and they are now not having any issues. Any suggestions on what I can do to troubleshoot the issue.

IT Answers » slow network

The entire network Slows Down when anyone does a download from the internet