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A null modem cable is basically a modem cable which reverses the send and recieve pins. If two serials were connected with a modem cable they would both try to listen for data on the same line and try to send data on the same line, so pins 2 & 3 of the cable are reversed wrt a modem cable. They are about $10. Most null modem cables or "laplink" cables come with both 9 and 25 pin ends and the other dangles off when one is connected. Kind of a pain it can get cluttery. Get either 9/25 and get an adaptor if needed. If you already have a modem cable you can also get null modem converter for a few dollars. Also get one with person friendly finger/thumb screws.... On ports and the like, I suggest your desktop modem at Com2 and make the null modem at Com4. You don't want it on Com1 'cause that's propaby where your modem is. On the thinkpad, at least the 701, the mouse is unrelated to com-ports, so I suggest that you put the Ir on Com2 and the Modem on Com1 and the serial on Com3 of the multiport. You will have to set the modem speed to the lower of the two machines. If you don't have software like Laplink or TranXit, any modem or terminal sofware will work. You will effectively be 'dialing' one machine from another and recieve the 'call' on the other, so use the faster machine as the one doing the work, and plug the TP to the adaptor to keep things running smoothly. You be sending and recieving files by sz or sendz for sending a file and gz for getting a file. Z-Modem is by far the most effecive if you can do it. Kermit and Y-Modem also work, but I think Z is faster. Dennis -------------------------------------------------------------------------- Dennis Pantazis My opinions are my own, and can not <pantazis@uiuc.edu> be interpreted as extensions of the Graduate Student in Civil Engineering University's official policies, University of Illinois-Urbana until they decide my opinion's are (the Extended Tour of Duty continues) worth money to the institution!!! You can see us at http://www.students.uiuc.edu/~pantazis !!!!! -------------------------------------------------------------------------