[Search] [pdf|bibtex] [Tracker] [WG] [Email] [Nits]

Versions: 00                                                            
Network Working Group                                    Greg Vaudreuil
Internet Draft                                      Lucent Technologies
Document: <draft-ietf-vpim vpimv2r2-vm-00.txt>            Glenn Parsons
Obsoletes: RFC 2423                                     Nortel Networks
Category: Standards Track                             November 16, 2000

                           VPIM Voice Message
                       MIME Sub-type Registration

Status of this Memo

   This document is an Internet-Draft and is in full conformance with
   all provisions of Section 10 of RFC2026.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups. Note that
   other groups may also distribute working documents as Internet-
   Drafts. Internet-Drafts are draft documents valid for a maximum of
   six months and may be updated, replaced, or obsoleted by other
   documents at any time. It is inappropriate to use Internet- Drafts
   as reference material or to cite them other than as "work in

   The list of current Internet-Drafts can be accessed at

   The list of Internet-Draft Shadow Directories can be accessed at

1. Abstract

   This document describes the registration of the MIME sub-type
   multipart/voice-message for use with the Voice Profile for Internet
   Mail(VPIM). A full description of usage can be found in the VPIM v2
   specification [VPIM2]. This document revises an earlier sub-type
   registration in RFC 1911 [VPIM1].

   This document obsoletes RFC 2423.

2. Conventions used in this document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   this document are to be interpreted as described in RFC-2119.

3. VPIM Scope

   The VPIM specification defines a restricted profile of the Internet
   multimedia messaging protocols for use between voice processing
   platforms. These platforms have historically been special-purpose
   computers and often do not have the same facilities normally
   associated with a traditional Internet Email-capable computer. As a
   result, VPIM also specifies additional functionality as it is
   needed. The profile is intended to specify the minimum common set of
   features to allow interworking between compliant systems.

Vaudreuil & Parsons       Expires: 16/05/01                          1
                       multipart/voice-message       November 16, 2000

4. Voice Message Interchange

4.1 multipart/voice-message

   The MIME sub-type multipart/voice-message is defined to hold
   specific media contents that are interchanged in messages between
   voice messaging systems described in [VPIM2R2]. Essentially, the
   sub-type provides a simple wrapper that easily identifies the entire
   content as being the components of a single voice message.  The sub-
   type is identical in semantics and syntax to multipart/mixed, as
   defined in [MIME2]. As such, it may be safely interpreted as a
   multipart/mixed by systems that do not understand the sub-type (only
   the identification as a voice message would be lost).

   This mechanism allows the insertion of an explanatory preamble (e.g.
   VPIM voice message attached) for recipients who read the message
   with pre-MIME software, since the preamble will be ignored by MIME-
   compliant software.

   In addition to the MIME required boundary parameter, a version
   parameter is also required for this sub-type.  This is to
   distinguish, this refinement of the sub-type from the previous
   definition in [VPIM1].  The value of the version parameter is "2.0"
   if the content conforms to the requirements of [VPIM2R2].  Should
   here be further revisions of this content type, there MUST be
   backwards compatibility (i.e. systems implementing version n can
   read version 2, and systems implementing version 2 can read version
   2 contents within a version n).  The default version value (when the
   parameter is missing) is 1, indicating the content conforms to the
   requirements of [VPIM1].

   [VPIM2R2] describes the restriction that only specific media types,
   applicable to voice messaging, are valid `next-level' contents of
   this sub-type (when version=2.0).  They are: audio/*, image/*,
   message/rfc822 and applicationtext/directory.  The multipart
   provides or the packaging of as many of these contents as is

3.2 VPIM v2 Usage

   The multipart/voice-message sub-type is a primary component of the
   VPIM specification [VPIM2R2].  All VPIM Messages MUST contain this
   sub-type to identify the wrapping of a voice message.  The contents
   of this wrapper can vary from only one audio/32KADPCM content to a
   complex set of related and nested contents.

   Typically, if more than one audio segment is present, the first is
   the spoken name of the originator, the second is the spoken subject,
   and the third is the voice message itself.  This order, however,
   MUST NOT be assumed in any case.  Further, the order that the
   contents appear SHOULD be the order in which they are presented to
   the user.

Vaudreuil & Parsons       Expires: 16/05/01                          2
                       multipart/voice-message       November 16, 2000

   The spoken name segment, if available, shall contain the name of the
   message sender in the voice of the sender.  The length of the spoken
   name segment must not exceed 12 seconds.

   The spoken subject segment, if available, shall contain the subject
   of the message sender in the voice of the sender.  The length of the
   spoken subject segment must not exceed 20 seconds.

   The directory information part, if present, will contain information
   specific to the originator of the voice message.

   Refer to the VPIM v2 Specification for details on proper usage.

4. IANA Registration

   To: ietf-types@iana.org
   Subject: Registration of MIME media type

   MIME media type name: multipart

   MIME subtype name: voice-message

   Required parameters: boundary, version

      The use of boundary is defined in [MIME2]

      The version parameter that contains the value "2.0" if
      enclosed content conforms to [VPIM2R2].  The absence of this
      parameter indicates conformance to the previous version
      defined in RFC 1911 [VPIM1].

   Optional parameters: none

   Encoding considerations: 7bit, 8bit or Binary

   Security considerations:

      This definition identifies the content as being a voice
      message.  In some environments (though likely not the
      majority), the loss of the anonymity of the content may be a
      security issue.

   Interoperability considerations:

      Systems developed to conform with [VPIM1] may not conform to
      this registration.  Specifically, the required version will
      likely be absent, in this case the recipient system should
      still be able to accept the message and will be able to
      handle the content.  The VPIM v1 positional identification,
      however, would likely be lost.

   Published specification:
      This document

   Applications which use this media type:

Vaudreuil & Parsons       Expires: 16/05/01                          3
                       multipart/voice-message       November 16, 2000

      Primarily voice messaging

   Additional information:

      Magic number(s): ?
      File extension(s): .VPM
      Macintosh File Type Code(s): VPIM

   Person & email address to contact for further information:

      Glenn W. Parsons

      Gregory M. Vaudreuil

   Intended usage: COMMON

   Author/Change controller:

      Glenn W. Parsons & Gregory M. Vaudreuil

5. Security Considerations

   Most security considerations are described in [VPIM2R2].

   This definition identifies the content as being a voice message.  In
   some environments (though likely not the majority), the loss of the
   anonymity of the content may be a security issue.

   In addition, implementors should be aware that they may receive
   invalid content in a mulitpart/voice-message that cannot be
   processed or stored.  This SHOULD NOT compromise the integrity of
   the valid contents of message.

6. References

   [V-MSG] G. Vaudreuil and G. Parsons, "VPIM Voice Message MIME Sub-
   type Registration", RFC 2423, September 1998.

   [MIME2] Freed, N., and N. Borenstein,  "Multipurpose Internet Mail
   Extensions (MIME) Part Two: Media Types ", RFC 2046, November 1996.

   [MIME4] Freed, N., Klensin, J., and J. Postel, "Multipurpose
   Internet Mail Extensions (MIME) Part Four: Registration Procedures",
   RFC 2048, November 1996.

   [VPIM1] Vaudreuil, G., "Voice Profile for Internet Mail", RFC 1911,
   February 1996.

   [VPIM2] Vaudreuil, G., and G. Parsons, "Voice Profile for Internet
   Mail - version 2", RFC 2421, September 1998.

   [VPIM2R2] Vaudreuil, G., and G. Parsons, "Voice Profile for Internet
   Mail - version 2", <draft-ietf-vpim-vpimv2r2-01.txt>, November 2000.

Vaudreuil & Parsons       Expires: 16/05/01                          4
                       multipart/voice-message       November 16, 2000

11. Author's Addresses

   Glenn W. Parsons
   Nortel Networks
   P.O. Box 3511, Station C
   Ottawa, ON  K1Y 4H7

   Phone: +1-613-763-7582
   Fax:   +1-416-597-7005
   EMail: gparsons@nortelnetworks.com

   Gregory M. Vaudreuil
   Lucent Technologies
   17080 Dallas Parkway
   Dallas, TX  75248-1905
   United States

   Phone/Fax: +1-972-733-2722
   EMail: gregv@lucent.com

Vaudreuil & Parsons       Expires: 16/05/01                          5
                       multipart/voice-message       November 16, 2000

8. Full Copyright Statement

   Copyright (C) The Internet Society (2000).  All Rights Reserved.

   This document and translations of it may be copied and furnished to
   others, and derivative works that comment on or otherwise explain it
   or assist in its implementation may be prepared, copied, published
   and distributed, in whole or in part, without restriction of any
   kind, provided that the above copyright notice and this paragraph
   are included on all such copies and derivative works.  However, this
   document itself may not be modified in any way, such as by removing
   the copyright notice or references to the Internet Society or other
   Internet organizations, except as needed for the purpose of
   developing Internet standards in which case the procedures for
   copyrights defined in the Internet Standards process must be
   followed, or as required to translate it into languages other than

   The limited permissions granted above are perpetual and will not be
   revoked by the Internet Society or its successors or assigns.

   This document and the information contained herein is provided on an

Vaudreuil & Parsons       Expires: 16/05/01                          6