See also IPv6 – Internet Protocol Version 6 References Bibliography Cohen, D., "Specifications for the Network Voice Protocol", Technical Report ISI/RR-75-39, USC/Information Sciences Institute, Marina del Rey, CA (Mar 1976). Cohen, D., "A Network Voice Protocol NVP-II" and "Sample NVP/ST Scenarios" (unpublished memorandums), USC/Information Sciences Institute, Marina del Rey, CA (Apr 1981). Topolcic, C., Park, P., Draft of "Proposed Changes to the Experimental Internet Stream Protocol (ST)", BBN Laboratories, Cambridge, MA (Apr 1987). Internet Protocol Audio network protocols