Denys - The 100 Base T and the 100 VG anylan are both available for the HP3000 on Express 3 - you will need new cards in your 3000, PC and where applicable a new HUB/Router. The NICs and Hubs will do both 100 and 10 in mixed environment. If you are considering a site with many users you might look at 100vg.com which will explain the wiring requirements and the 100VG technology. It has some white papers and suppliers lists - 3com,HP are among the suppliers. In Summary - you can get more distance with 100VG - you can use CAT3 or CAT5 wiring - supports TCP/IP and Token Ring - The knee of the curve is further out because of the way it works - you get more users on the same segment given same traffic as 100BT - you will need less hubs and routers to get the same job done. Best Regards, Birket Birket Foster M. B. Foster Associates .. the 1-800-ANSWERS people! (613) 448-2333 or (613) 448-2588 (FAX) (Thanks for your support of our 32bit DataExpress ODBCLink Driver)