This combo card gives LAN and a 56k modem connection. It has what is called an X-Jack which slips out the side of the card, then a RJ connector can connect the card. These Jacks are flimsy and break easy.
3Com 3CXEM556 Driver
File: 3cxem556.zip
30bb13db70bc96ddd40cb287e692df8c9e895e45fd81dc164049f3e399f863d9
3Com 3CXEM556 Driver
File: 3com-3cxem556.zip
2bf2e205e5570c2d43c3ec41ff9662f6e47c9dc65da876f446dec00d98135ef3