need more serial ports

I have several devices that communicate with a pc via serial ports. I've
been using them on and off, one at the time, because my pc only has one
serial port. Now I want to use them all together. I searched and I found a
serial multiport card here:

http://www.stayonline.com/detail.aspx?ID=1131&gclid=CLGf2e_buokCFRBoNAodNR79qw

I didn't even know something like this existed. Anyway, I'm wondering if
something like this would work under linux.

Does anybody know of a different solution?

Thanks!
.

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