Sitecom 54g card and connection with Belkin 54g router

I buileded a network with a Belkin 54g router for ADSL and PCI-cards 54 from
Sitecom. What a misery that was. It took 5 days and hours with the Belkin
Helpdesk (great guys !)
The problem was caused by the pci-card, it appeared. I called two times the
helpdesk if Sitecom and they were convinced that the problem was with
Belkin. Belkin did their utmost best to help me out.
But when I called Sitecom, after these 5 days, again, I got someone on the
line (certain Eelco) who knew the answer immediately. "Oh, Belkin, than you
just need to change some TCP/IP settings of the card".
If you have the same problem: call them for the solution and insist to get
the right answer.

Much better: buy equipment of the same supplier

Good luck