I've used the 3CCFEM556B and both functions work simultaneously. I haven't tested the Psion card. The CardBus interface is much higher performance than the original 16-bit PCMCIA interface. The max performance of the 16-bit bus is about 2 MB/sec. The max for CardBus is PCI bus speed, 133 MB/sec. For network cards, I see ~1.5 MB/sec with the 3CCFEM556B, which is not too hot for 100baseT. Something like the 3CCFE575BT will give close to 10 MB/sec. It depends on how much performance you need; for a lot of people, a cheap 100baseT card with tolerable performance is a good deal. And there are a lot more options for 16-bit 100baseT/modem cards that work with linux, than for CardBus 100baseT/modem cards. -- Dave |