http://www.rfc-editor.org/rfc/rfc0978.txt
RFC 0978: Voice File Interchange Protocol (VFIP), J.K. Reynolds, R. Gillman, W.A. Brackenridge, A. Witkowski, J. Postel1986-02-01T23:00:00-00:00The purpose of the Voice File Interchange Protocol (VFIP) is to permit the interchange of various types of speech files between different systems in the ARPA-Internet community. Suggestions for improvement are encouraged.