3Com Fast Ethernet 10/100 Dongle (3C-PC-TXM-CBL) Part Number: 07-0437-000. Works with 3Com Megahertz 10/100 LAN+56K 3CXFEM656C. Dual speed, 10/100 cable using an RJ-45. Cable only! Please click on the Specification URL below for more details.