IETF RFC 4239
Internet Voice Messaging (IVM)
|Publication Date:||1 November 2005|
This document describes the carriage of voicemail messages over Internet mail as part of a unified messaging infrastructure.
The Internet Voice Messaging (IVM) concept described in this document is not a successor format to VPIM v2 (Voice Profile for Internet Mail Version 2), but rather an alternative specification for a different application.