Hello,

I'm in a situation where I need to plug 24 high bandwidths USB devices into 
the same machine (they're DSL modems actually).

I'm using 6 hubs, 2 of them plugged directly on the PC, and the fours others 
on the first hubs. Every hub has in turn 4 devices plugged in.

The trouble is that all the bandwidth is soon taken up, in ISO mode I get "usb 
check bandwidth would have failed" messages, and in bulk mode, thousands of 
"ENXIO" messages.

I determined that I can safely plug up to 8 modems on this setup, and after 
that the USB bus collapses.

So I think I'm gonna use 2 additional PCI USB host controllers, if that means 
each of them has its own bus and bandwidth.

Can anyone confirm that I'll have indeed 3x12Mbps, and can 
usb-uhci/usb-ohci/uhci handle this setup ?

Thanks a lot...


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