if you have a double phone plug (e.g a plug that enables you to have two telephones in one wall socket) , then just plug both modems into it. set you computer to be a dail up server (if your using windows , just look it up in help) , then the other one just have it dail 1 number (my friend and i couldnt do it otherwise) , make sure its set to not wait for the dial tone. but network cards are probably a better option , but its good to know these things in case your in a bind. you could also buy a null modem cable (i think

) , or usb networks are another option.