Abstract: A method and system for estimating the effectiveness and efficiency of a communication device is disclosed. The system includes a computer executing a communication efficiency program. The computer further includes a modem that is coupled to a plurality of transmission devices through a plurality of I/O ports. Prior to transmitting a selected data file through the modem to one of the transmission devices for subsequent transmission to a remote site, a user may evaluate information about the transmission of the selected data file through a transmission device such as the estimated cost and time of transmission for the data file. The program provides the estimates by using retrieved data file parameters for the selected data file and user defined data transmission parameters for the various transmission devices. The estimated cost and time are stored and the user may select another device for which the time and costs of transmission are estimated.