>"...over a regular phone line using network cards..."
Not unless the network cards are phoneline network cards (e.g., http://duxcw.com/digest/Reviews/Network/dlink/dhn910/dhn910.htm). The best way to do it is with 100BASE-TX network adapters and a CAT 5 crossover cable (http://duxcw.com/digest/Howto/network/net2pc/hardware.htm and http://duxcw.com/digest/Howto/network/cable/cable6.htm). It can be done with a hub or switch (http://duxcw.com/faq/network/hubsw.htm) and two CAT 5 straight-thru cables. If you have or are planning a broadband cable MODEM or DSL Internet connection, the best way to do it is with a router instead of ICS (http://duxcw.com/faq/ics/waysshare.htm , http://duxcw.com/faq/ics/diffrout.htm). Crossover cables are widely available. Search the Internet. If made locally, be sure they test it (http://duxcw.com/faq/network/catest.htm). Faulty cables, etc. cause 70% of network problems. Defective crossover cables made by people who donít know how to make them, are made from the wrong components, or are not tested before delivery to the end user are the subjects of many posts in this forum. I can make one for you if at a reasonable price plus S&H if you canít find one. Larry