No, there aren't.

 Look at any of these FAQ's for more info:

http://www.senet.com.au/help/modems/
http://www.aimnet.com/~jnavas/modem/faq.html
http://come.to/modemfaq

Cliff Mark wrote:
>
> I've noticed that both PCI and ISA modems are available.
> Are there any particular advantages or disadvantages to either bus?
>
> Thanks
>
> Cliff J Mark
>
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