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Versions: (draft-ema-vpim-address) 00 01 02 03 RFC 3804

VPIM Working Group                                       Glenn Parsons
Internet Draft                                         Nortel Networks
Document: <draft-ietf-vpim-address-03.txt>               June 28, 2002
Category: Standards Track



         VPIM (Voice Profile for Internet Mail) Addressing


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 progress."
The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html.

Abstract

This document lists the various VPIM (Voice Profile for Internet Mail)
email address formats that are currently in common use and defines
several new address formats for special case usage.   Requirements are
imposed on the formats of addresses used in VPIM submission mode.

Copyright Statement

Copyright (C) The Internet Society (2002).  All Rights Reserved.



















 Parsons                   Expires: 28/01/03                         1
                            VPIM Addressing                  June 2002



Table of Contents


1. Introduction.....................................................3
2. Conventions used in this document................................3
3. VPIM v2 Addressing...............................................3
4. VPIM Addressing..................................................4
   4.1 VPIM Gateways................................................4
   4.2 VPIM Submission LHS..........................................4
   4.3 VPIM Submission Addresses....................................7
5. Security Considerations..........................................8
6. IANA Consideration...............................................9
   6.1: IANA Registration form for new value of GSTN address
        service-selector "VPIM".....................................9
   6.2: IANA Registration form for new value of GSTN address
        service-selector "VOICE"...................................10
   6.3: IANA Registration form for new value of GSTN address
        service-selector "AMIS"....................................10
   6.4: IANA Registration form for new value of GSTN address
        qualif-type1 keyword and value "SYSNUM"....................11
   6.5: IANA Registration form for new value of GSTN address
        qualif-type1 keyword and value "EXT".......................12
   6.6: IANA Registration form for new value of GSTN address
        qualif-type1 keyword and value "DL"........................13
7. References......................................................12
   7.1 Normative References........................................14
   7.1 Non-Normative References....................................14
8. Author's Address................................................15
9. Full Copyright Statement........................................15























 Parsons                   Expires: 28/01/03                         2
                            VPIM Addressing                  June 2002


1. Introduction

This document lists the various VPIM email address formats that are
currently in common use and defines several new address formats for
special case usage.   Requirements are imposed on the formats of
addresses used in VPIM submission mode

[VPIM2] does not place any restrictions on the email address format.
However, it does recommend the use of a numeric LHS since many legacy
voice mail systems only use digits to identify mailboxes. Further, it
recommends a structure to handle private, international and
extensions. The private format has become deployed in most existing
VPIM v2 systems, further some systems will only accept messages from
addresses with a numeric LHS.

[IVM] does not describe addressing at all. The LHS format is left to
the discretion of the mailbox owner. However, it is useful in some
cases (like submission or tunneling) to specify a LHS format. A format
based on GSTN addressing [GSTN] is presented.

This document defines the various recipient (i.e., TO) addresses for
VPIM and IVM messages.


2. Conventions used in this document

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

"LHS" as used in this document is to be interpreted as the left side
of the "@" in an email address.  It is defined as "local-part" in RFC-
822.

"RHS" as used in this document is to be interpreted as the right side
of the "@" in an email address.  It is defined as "domain" in RFC-822.

3. VPIM v2 Addressing

This is defined in section 4.2.1 of [VPIM2] & [VPIMV2R2].  Of the four
groups of addresses defined, the mailbox number format is the most
commonly used in VPIM v2 systems.

        Example:  6137637582@nortelnetworks.com









 Parsons                   Expires: 28/01/03                         3
                            VPIM Addressing                  June 2002


4. VPIM Addressing

VPIM places no restrictions on the form of the Internet address. VPIM
systems must be capable of receiving an arbitrary email address and
generating a reply to that address. No inferences about the structure
of the local part (LHS) should be necessary.

Recipients email addresses must be created in a form compatible with
the recipients system and consistent with the address entry
capabilities of a telephone user interface.

The following sections use formal syntax compliant with RFC 2234,
"Augmented BNF for Syntax Specifications: ABNF".


4.1 VPIM Gateways

A gateway translates between dissimilar environments.  For VPIM, a
gateway connects between the VPIM profile of Internet mail and other
voice mail networking protocols (including voice call answer and
delivery).  These may be proprietary or standard (like AMIS [AMIS-A]).
VPIM gateways typically service multiple voice mail users or, in the
case of call answer, service only one. In the former case, they serve
as a classic "mail transfer agent" (MTA) and in the latter as a
classic "mail user agent" (UA).

An onramp is a gateway which connects from another voice mail
networking protocl to VPIM.  An offramp is a gateway which connects
from VPIM to another voice mail networking protocol. Behavior of
onramps and offramps is out of scope for this specification.

This specification describes the VPIM service portion of onramp and
offramp addressing.


4.2 VPIM Submission LHS

Limited capability voice mail machines may send messages by default to
an external message submission gateway.  These gateways will convert
the unresolved telephone number of the recipient into a legitimate
email address.  Messages requiring address resolution must be sent to
a submission system which will convert the submitted address into the
route-able email address.

Additionally, limited capability email systems may send messages to a
VPIM onramp system indicated on the RHS. The LHS would indicate that
the message is to be sent as a VPIM message to the telephone number
indicated. In this case, address and message translation is performed
by the gateway.




 Parsons                   Expires: 28/01/03                         4
                            VPIM Addressing                  June 2002


Telephone numbers sent in a VPIM submission mode MUST be sent in one
of the following forms.

This is based on the format defined in [GSTN-ADDR] and extensions in
[GSTN].


4.2.1 The VPIM address

For voice messages that are intended to be sent as VPIM messages the
service-selector element is defined to be:

vpim-service-selector = "VPIM"

The resultant vpim-address and vpim-mbox are formally

vpim-address = vpim-mbox
              [ pstn-recipient ]

vpim-mbox = [ "VPIM=" ] ( global-phone / local-phone )
            [ sub-addr-spec ext-addr-spec dl-addr-spec]

dl-addr-spec = "/DL=" sub-addr
                        ;note that "/DL=" is case INSENSITIVE
ext-addr-spec = [ ext-sep sub-addr ]
ext-sep = ( "/EXT=" / "+" )
                      ; note that "/EXT=" is case INSENSITIVE
                      ; "+" is used for compatibility with current
                      ; VPIM v2 addressing

For clarity, here is an example of a very simple vpim-mbox:
     VPIM=6137637582

The extension syntax, that is a phone number followed by "/EXT="
defining the extension, would be used where the mailbox does not have
a direct dial number associated with it (e.g., typically behind a non-
ISDN PBX).   For example:

     VPIM=7035255550/EXT=227

The distribution list syntax, that is a phone number followed by
"/DL=" defining the list, would be used to refer to a distribution
list associated with the phone number (with or without an extension).
For example:


     VPIM=+14165977230/DL=93






 Parsons                   Expires: 28/01/03                         5
                            VPIM Addressing                  June 2002


4.2.2 The Voice address

For voice messages that are intended to be sent as a voice outdialing
at the destination system, the service-selector element is defined to
be:

voice-service-selector = "VOICE"

The resultant voice-address and voice-mbox are formally

voice-address = voice-mbox
               [ pstn-recipient ]

voice-mbox = "VOICE=" ( global-phone / local-phone )
                   [ sub-addr spec ] [post-sep post-dial]

For more clarity, here is an example of a very simple voice-mbox:

VOICE=+3940226338


4.2.3 The AMIS address

For voice messages that are intended to be sent as AMIS (Audio
Messaging Interchange Specification) voice mail messages (as defined
in [AMIS-A] & [AMIS-D]), the service-selector element is defined to
be:

amis-service-selector = "AMIS"

The resultant amis-address and amis-mbox are formally

amis-address = amis-mbox

amis-mbox = "AMIS=" amis-mailbox
            [ "/SYSNUM=" amis-sysnum ]
            ; note that "/SYSNUM=" is case INSENSITIVE

amis-mailbox = ( amis-a / amis-d )

amis-a = amis-a-number

amis-d = [ amis-mailbox-numberplan ][ "+" ] amis-mailbox-id
            [ "+" ] [ amis-mailbox-extension ]
     ; The "+" separators are used to be compatible
            ; the X.400 AMIS-D mailbox definition --
            ; if more than one element is present, both
            ; "+" must appear.  Note also that the total
            ; length of this field is restricted to 32
            ; characters by AMIS-D.



 Parsons                   Expires: 28/01/03                         6
                            VPIM Addressing                  June 2002


amis-mailbox-numberplan = 1*VCHAR

amis-mailbox-id = 1*16(VCHAR)

amis-mailbox-extension = 1*VCHAR

amis-sysnum =  amis-a-number

amis-a-number = ( amis-PSTN-number / amis-private-number )

amis-PSTN-number = int-country-code "+"
                   area-code "+"
                   local-number "+"
                   ; This is in agreement with ITU [E.164]
                   ; specification and per [AMIS-A] - the
                   ; maximum length is 15 numeric digits.
                   ; The "+" separators are used to be
                   ; compatible with the X.400 AMIS-D
                   ; mailbox definition and replace the '#'
                   ; separators of AMIS-A

amis-private-number = "0++" local-number "+"
                   ; [AMIS-A] indicates that maximum permitted
                   ; length of the private number is 14
                   ; digits

int-country-code = 1*4(DIGIT)

area-code = 1*(DIGIT)

local-number = 1*(DIGIT)

For more clarity, here is an example of a simple AMIS-A amis-mbox:

AMIS=+1/401+3278144+/SYSNUM=1+401+3279542+


4.2.4 The fax address

Fax addresses used in VPIM are formatted as defined in [FAX-
ADDR],section 2.


4.3 VPIM Submission Addresses

Based on [GSTN-ADDR], these are the resultant email addresses for the
LHS presented above.  VPIM and IVM  systems that support submission
MUST accept, translate (if necessary), and forward messages sent to
these addresses.




 Parsons                   Expires: 28/01/03                         7
                            VPIM Addressing                  June 2002


4.3.1 The vpim-email

The vpim-email element is a specific version of pstn-email for VPIM
over the Internet e-mail transport system, where the service-selector
distinction is set to "VPIM".

vpim-email =  ["/"] vpim-address ["/"] "@" mta-I-pstn

In this case the mta-I-pstn will usually point to a VPIM capable
messaging system where the attached message will be delivered
properly.


4.3.2 The voice-email

The voice-email element is a specific version of pstn-email for the
voice outdialing over the Internet e-mail transport system, where the
service-selector distinction is set to "VOICE".

voice-email =  ["/"] voice-address ["/"] "@" mta-I-pstn

In this case the mta-I-pstn will usually point to a device that will
perform an outdial, that is for example, make a telephone call to the
specified number and play a voice attachment.


4.3.3 The amis-email

The amis-email element is a specific version of pstn-email for the
AMIS over the Internet e-mail transport system, where the service-
selector distinction is set to "AMIS".

amis-email =  ["/"] amis-address ["/"] "@" mta-I-pstn

In this case the mta-I-pstn will usually point to a device that acts
as a gateway to an AMIS network where the attached voice message will
be delivered properly.


4.3.4 The fax-email

Fax email addresses used in VPIM are formatted as defined in [FAX-
ADDR], section 4.



5. Security Considerations

Most security considerations are already identified in [VPIM2] and
[IVM].



 Parsons                   Expires: 28/01/03                         8
                            VPIM Addressing                  June 2002


An additional concern would be that the sender must trust and also be
aware of the policies of the submission MTA to which the message is
submitted.  This is because, that MTA will make the determination of
where the final destination is and how it will be delivered based on
the VPIM submission LHS.

Submission MTAs should take care to not blindly place outdial calls to
any number submitted (e.g., international numbers or "1-900" numbers).
Ideally, senders should be authenticated to confirm their outdialing
privileges.


6. IANA Considerations


6.1: IANA Registration form for new value of GSTN address
service-selector "VPIM"

To: IANA@iana.org

Subject: Registration of new values for the GSTN address
   service-selector specifier "VPIM"

service-selector name:

   VPIM

Description of Use:

   VPIM - specify that the GSTN address refers to a voice
   mailbox that is intended to accept a VPIM message.

   For a complete description refer to "VPIM Addressing",
   draft-ietf-vpim-address-03.txt.

Security Considerations:

   See the Security Consideration section of "VPIM
   Addressing", draft-ietf-vpim-address-03.txt.

Person & email address to contact for further information:

   Glenn W. Parsons
   Nortel Networks
   P.0. Box 3511 Station C
   Ottawa, On  K1Y 4H7
   Canada
   Phone: +1-613-763-7582
   Fax  : +1-613-763-2697
   Email: gparsons@nortelnetworks.com



 Parsons                   Expires: 28/01/03                         9
                            VPIM Addressing                  June 2002


6.2: IANA Registration form for new value of GSTN address
service-selector "VOICE"

To: IANA@iana.org

Subject: Registration of new values for the GSTN address
         service-selector specifier "VOICE"

service-selector name:

   VOICE

Description of Use:

   VOICE - specify that the GSTN address refers to a voice
   device that is intended to be sent a voice message via an
   'outdialing'.

For a complete description refer to "VPIM Addressing",
draft-ietf-vpim-address-03.txt.

Security Considerations:

See the Security Consideration section of "VPIM
Addressing", draft-ietf-vpim-address-03.txt.

Person & email address to contact for further information:

   Glenn W. Parsons
   Nortel Networks
   P.0. Box 3511 Station C
   Ottawa, On  K1Y 4H7
   Canada
   Phone: +1-613-763-7582
   Fax  : +1-613-763-2697
   Email: gparsons@nortelnetworks.com


6.3: IANA Registration form for new value of GSTN address
service-selector "AMIS"

To: IANA@iana.org

Subject: Registration of new values for the GSTN address
         service-selector specifier "AMIS"

service-selector name:

   AMIS




 Parsons                   Expires: 28/01/03                        10
                            VPIM Addressing                  June 2002


Description of Use:

   AMIS - specify that the GSTN address refers to a voice
   mailbox that is intended to be sent an AMIS (Audio
   Messaging Interchange Specification) voice mail message.

For a complete description refer to "VPIM Addressing",
draft-ietf-vpim-address-03.txt.

Security Considerations:

See the Security Consideration section of "VPIM
Addressing", draft-ietf-vpim-address-03.txt.

Person & email address to contact for further information:

   Glenn W. Parsons
   Nortel Networks
   P.0. Box 3511 Station C
   Ottawa, On  K1Y 4H7
   Canada
   Phone: +1-613-763-7582
   Fax  : +1-613-763-2697
   Email: gparsons@nortelnetworks.com


6.4: IANA Registration form for new value of GSTN address
qualif-type1 keyword and value "SYSNUM"

To: IANA@iana.org

Subject: Registration of new values for the GSTN address
         qualif-type1 element "sysnum"

qualif-type1 "keyword" name:

   sysnum

qualif-type1 "value" ABNF definition:

   sysnum = 1*(DIGIT / "+")

Description of Use:

   sysnum is used to specify the numeric optional AMIS sub-
   address element as described in "VPIM Addressing",
   draft-ietf-vpim-address-03.txt.

Use Restriction:

   The use of "SYSNUM" is restricted to "AMIS" service-
   selector, is it has no meaning outside the AMIS service.

 Parsons                   Expires: 28/01/03                        11
                            VPIM Addressing                  June 2002


Security Considerations:

   See the Security Consideration section of "VPIM
   Addressing", draft-ietf-vpim-address-03.txt.

Person & email address to contact for further information:

   Glenn W. Parsons
   Nortel Networks
   P.0. Box 3511 Station C
   Ottawa, On  K1Y 4H7
   Canada
   Phone: +1-613-763-7582
   Fax  : +1-613-763-2697
   Email: gparsons@nortelnetworks.com


6.5: IANA Registration form for new value of GSTN address qualif-type1
keyword and value "EXT"

To: IANA@iana.org

Subject: Registration of new values for the GSTN address
         qualif-type1 element "EXT"

qualif-type1 "keyword" name:

   ext

qualif-type1 "value" ABNF definition:

   ext = 1*(DIGIT)

Description of Use:

   EXT is used to specify the numeric optional extension
   That idenitifies a particular VPIM mailbox as
   described in "VPIM Addressing",
   draft-ietf-vpim-address-03.txt.

Use Restriction:

   The use of "EXT" is intended for the "VPIM" service-
   selector, however is may have meaning and be used outside
   the VPIM service.

Security Considerations:

   See the Security Consideration section of "VPIM
   Addressing", draft-ietf-vpim-address-03.txt.



 Parsons                   Expires: 28/01/03                        12
                            VPIM Addressing                  June 2002


Person & email address to contact for further information:

   Glenn W. Parsons
   Nortel Networks
   P.0. Box 3511 Station C
   Ottawa, On  K1Y 4H7
   Canada
   Phone: +1-613-763-7582
   Fax  : +1-613-763-2697
   Email: gparsons@nortelnetworks.com


6.6: IANA Registration form for new value of GSTN address qualif-type1
keyword and value "DL"

To: IANA@iana.org

Subject: Registration of new values for the GSTN address
         qualif-type1 element "DL"

qualif-type1 "keyword" name:

   dl

qualif-type1 "value" ABNF definition:

   dl = 1*(DIGIT)

Description of Use:

   DL is used to specify the numeric optional personal
   Distribution list for a particular VPIM mailbox as
   described in "VPIM Addressing",
   draft-ietf-vpim-address-03.txt.

Use Restriction:

   The use of "DL" is intended for the "VPIM" service-
   selector, however is may have meaning and be used outside
   the VPIM service.

Security Considerations:

   See the Security Consideration section of "VPIM
   Addressing", draft-ietf-vpim-address-03.txt.








 Parsons                   Expires: 28/01/03                        13
                            VPIM Addressing                  June 2002


Person & email address to contact for further information:

   Glenn W. Parsons
   Nortel Networks
   P.0. Box 3511 Station C
   Ottawa, On  K1Y 4H7
   Canada
   Phone: +1-613-763-7582
   Fax  : +1-613-763-2697
   Email: gparsons@nortelnetworks.com



7. References

7.1 Normative References

[GSTN] Allocchio, C., "GSTN Address Element Extensions in e-mail
Services", RFC 2846, June 2000.

[RFC822] Crocker, D., "Standard for the Format of ARPA Internet Text
Messages", STD 11, RFC 822, UDEL, August 1982.

[VPIM2] Vaudreuil, Greg, Parsons, Glenn, "Voice Profile for Internet
Mail, Version 2", RFC 2421, September 1998.

[VPIMV2R2] Vaudreuil, Greg, Parsons, Glenn, "Voice Profile for
Internet Mail, version 2", <draft-ietf-vpim-vpimv2r2-05.txt>, February
2002.

[FAX-ADDR] Allocchio, C., "Minimal FAX address format in Internet
Mail", RFC 3192 October 2001.

[GSTN-ADDR] Allocchio, C., "Minimal GSTN address format in Internet
Mail", RFC 3191 October 2001.


7.1 Non-Normative References

[AMIS-A] Audio Messaging Interchange Specifications (AMIS) - Analog
Protocol Version 1, Issue 2, February 1992.

[AMIS-D] Audio Messaging Interchange Specifications (AMIS) - Digital
Protocol Version 1, Issue 3, August 1993.

[E.164] CCITT Recommendation E.164 (1991), Telephone Network and ISDN
Operation, Numbering, Routing and  Mobile Service - Numbering Plan for
the ISDN Era.

[IVM] McRae, Stuart, Parsons, Glenn, "Internet Voice Mail", <draft-
ietf-ivm-04.txt>, June 2002.


 Parsons                   Expires: 28/01/03                        14
                            VPIM Addressing                  June 2002


8. Author's Address

Glenn W. Parsons
Nortel Networks
Ottawa, ON K1Y 4H7
Phone: +1-613-763-7582
Fax  : +1-613-967-5060
Email: gparsons@nortelnetworks.com



9. Full Copyright Statement

Copyright (C) The Internet Society (2002).  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 English.

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
"AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN
WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
















 Parsons                   Expires: 28/01/03                        15


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