(Voice Profile for Internet Mail) A method for encoding voicemail messages as data so they can travel via the SMTP mail protocol over IP networks. VPIM uses MIME to encode messages in multiple parts, which are decoded by VPIM-compliant voicemail systems at the other end.
A specification from the Internet Engineering Task Force (IETF) for transporting voice mail over TCP/IP networks, including the public Internet,VPIM superseded the Audio Messaging Interchange Specification (AMIS).VPIM wraps ADPCM-encoded voice messages in Multipurpose Internet Mail Extensions (MIME) message parts and uses Simple Mail Transfer Protocol (SMTP) to send them over TCP/IP networks. The first specification for VPIM was RFC 1911 (1996), which was followed by RFCs 2421 and 2421v2 (1998). See also ADPCM, AMIS, IETF, Internet, IP, MIME, RFC, SMTP, TCP, and voice mail.