3Com OfficeConnect 8port hubs - port failure problem

[Buggeroo]

I have a bunch of 3com OfficeConnect 8 port hubs stacked together, does anybody know why some of the ports occasionally stop working? They seem to do this without any reason and the immediate solution is to disconnect the power-supply and then reconnect it. This gets them working again for a while, until the next time the problem arises. I would very much like to know if anybody has encountered a similar problem and possibly a solution.
Please help!

 

[Jersey]

I had the same problem with a 3com Officeconnect. I could sit and watch the ports lose a connection and a minute later start working again. I send mine back to 3com and it was promptly replaced. The new one works flawlessly.