4 port, half-size, low-cost, full-featured voice processing platform with ISA bus. Features Digital Signal Processing (DSP) technology, plus a full line of software algorithms and utilities. 8-bit bus supporting Windows 95, DOS, and Unix. Prelude Series platforms support AccuTalk, AccuDigit, and AccuCall enhanced voice processing algorithms for state-of-the-art voice processing. Formerly Rhetorex and Lucent CTP.