A study of the libraries cooperating in the Fox Valley (Wisconsin) Interlibrary Loan Network compared alternative equipment and communications scenarios which would satisfy the functions desired by the libraries. The dominant communications need identified through a survey of network participants was the sending of interlibrary loan requests among network members and between network members and other resource libraries. The study considered four major options for equipment (TWX terminals, microprocessor terminals, microcomputers, and microcomputers with central clearinghouse node) and seven different transmission possibilities (TWX direct or via computer, State Telephone System or Direct Distance Dialing at either 300 Baud or 1200 Baud data transfer rates, or Telepak, the existing system) as possible solutions to satisfy the Network's communications needs. Results indicate that microcomputer nodes with communications software could provide added functions at a cost comparable to the cost for the currently used technology. Two appendices provide results of the informal survey of library needs and the notes on system selection. (LMM)