3com Megahertz brand 10 / 100 ethernet LAN w/ 56k modem PC Card for notebooks

3Com Megahertz 10/100 LAN CardBus PC Card Model 3CCFE575BT

3Com Megahertz 56K Cellular Modem PC Card Model 3CXM556

3com Megahertz 10/100 LAN Cable Dongles for Ethernet RJ45

IBM XJACK Connector PC Card By Megahertz

3com Megahertz 10/100 LAN+56K Cable Dongles for Ethernet RJ45 and Modem RJ11

3Com 3C900-Combo EtherLink XL PCI network adapter, BNC AUI & 10-base-T LAN card