Sorry, I didn't notice the "CT" bit...
3Com PCMCIA Ethernet Adapter Issues
3c 575 (Christopher Naas)
No problem: now it might be good to configure eth0 (David Hinds)
3ccfe575ct continued (Christopher Naas)
Date: 1999, Nov 08
From: David Hinds <firstname.lastname@example.org>
Oh. You can't just edit the config file: this card is different from
the other 3CCFE575 variants, and requires a driver modification.
You need a more recent PCMCIA driver package: support for this card
was added in 3.1.2.
to: "Sorry, I didn't notice the "CT" bit..."