Voice Profile for Internet Mail - version 2
RFC 2421

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• Email expansions
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• 07

Network Working Group                                       G. Vaudreuil
Request for Comments: 2421                           Lucent Technologies
Obsoletes: 1911                                               G. Parsons
Category: Standards Track                               Northern Telecom
                                                          September 1998

              Voice Profile for Internet Mail - version 2

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (1998).  All Rights Reserved.

Overview

   This document profiles Internet mail for voice messaging.  It
   obsoletes RFC 1911 which describes version 1 of the profile.  A list
   of changes from that document are noted in Appendix F.  As well,
   Appendix A summarizes the protocol profiles of this version of VPIM.

   Please send comments on this document to the EMA VPIM Work Group
   mailing list:  <vpim-l@ema.org>

Working Group Summary

   This profile is not the product of an IETF working group, though
   several have reviewed the document.  It is instead the product of the
   VPIM Work Group of the Electronic Messaging Association (EMA).  This
   work group, which has representatives from most major voice mail
   vendors and several email vendors, has held several interoperability
   demonstrations between voice messaging vendors and is currently
   promoting VPIM trials and deployment.

Vaudreuil & Parsons         Standards Track                     [Page 1]
RFC 2421                        VPIM v2                   September 1998

Table of Contents

   1. ABSTRACT .........................................................3
   2. SCOPE ............................................................3
     2.1 Voice Messaging System Limitations ............................3
     2.2 Design Goals ..................................................4
   3. PROTOCOL RESTRICTIONS ............................................5
   4. VOICE MESSAGE INTERCHANGE FORMAT .................................6
     4.1 Message Addressing Formats ....................................6
     4.2 Message Header Fields .........................................9
     4.3 Voice Message Content Types ..................................15
     4.4 Other Message Content Types ..................................21
     4.5 Forwarded Messages ...........................................23
     4.6 Reply Messages ...............................................23
     4.7 Notification Messages ........................................24
   5. MESSAGE TRANSPORT PROTOCOL ......................................24
     5.1 ESMTP Commands ...............................................25
     5.2 ESMTP Keywords ...............................................27
     5.3 ESMTP Parameters - MAIL FROM .................................28
     5.4 ESMTP Parameters - RCPT TO ...................................29
     5.5 ESMTP - SMTP Downgrading .....................................29
   6. DIRECTORY ADDRESS RESOLUTION ....................................30
   7. IMAP ............................................................30
   8. MANAGEMENT PROTOCOLS ............................................30
     8.1 Network Management ...........................................31
   9. CONFORMANCE REQUIREMENTS ........................................31
   10. SECURITY CONSIDERATIONS ........................................32
     10.1 General Directive ...........................................32
     10.2 Threats and Problems ........................................32
     10.3 Security Techniques .........................................33
   11. REFERENCES .....................................................33
   12. ACKNOWLEDGMENTS ................................................36
   13. AUTHORS' ADDRESSES .............................................36
   14. APPENDIX A - VPIM REQUIREMENTS SUMMARY .........................37
   15. APPENDIX B - EXAMPLE VOICE MESSAGES ............................45
   16. APPENDIX C - EXAMPLE ERROR VOICE PROCESSING ERROR CODES ........50
   17. APPENDIX D - EXAMPLE VOICE PROCESSING DISPOSITION TYPES ........51
   18. APPENDIX E - IANA REGISTRATIONS ................................52
     18.1 vCard EMAIL Type Definition for VPIM ........................52
     18.2 Voice Content-Disposition Parameter Definition ..............52
   19. APPENDIX F - CHANGE HISTORY: RFC 1911 TO THIS DOCUMENT .........54
   20. FULL COPYRIGHT NOTICE ..........................................56

Vaudreuil & Parsons         Standards Track                     [Page 2]
RFC 2421                        VPIM v2                   September 1998