The Transmit/Receive File Utility allows transmission and reception of files to/from t1 or e1 lines with greater flexibility than the Record/Playback Software. The optional Record/Playback software runs as a feature under the T1/E1 GUI application software. The transmit/receive file utility program, however, runs as a "console" program and is intended for use by other WIN XP/2000/Vista applications as a "callable" function. The program can also be run as a standalone program. Examples of use include its use with MATLAB programs or other programs that can call external programs.