Internet Draft Glenn Parsons
Expires in six months Nortel Networks
Document: <draft-ema-vpim-address-01.txt> March 10, 2000
VPIM Addressing
<draft-ema-vpim-address-01.txt>
Status of this Memo
This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026.
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Copyright Notice
Copyright (C) The Internet Society (2000). All Rights Reserved.
Overview
This document lists the various VPIM email addresses that are
currently in common use and defines several new address formats for
special case usage. This draft is a part of the charter of the IETF
VPIM BOF/WG.
The VPIM WG home page is: http://www.ema.org/vpim
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Table of Contents
1. Abstract
2. Introduction
3. VPIM v2 Addressing
4. VPIM v3 Addressing
4.1 VPIM v3 Submission LHS
4.1.1 The VPIM Address
4.1.2 The Voice Address
4.1.3 The AMIS Address
4.1.4 The Fax Address
4.2 VPIM v3 Submission Addresses
4.2.1 The vpim-email
4.2.2 The voice-email
4.2.3 The amis-email
4.2.4 The fax-email
5. References
6. Security Considerations
7. Author's Address
8. Full Copyright Statement
9. Appendix A: IANA Registration form for new value of GSTN
address service-selector "VPIM"
10. Appendix A: IANA Registration form for new value of GSTN
address service-selector "VOICE"
11. Appendix A: IANA Registration form for new value of GSTN
address service-selector "AMIS"
12. Appendix D: IANA Registration form for new value of GSTN
address qualit-type1 keyword and value "SYSNUM"
1. Abstract
This document lists the various VPIM email addresses that are
currently in common use and defines several new address formats for
special case usage.
2. Introduction
[VPIM2] does not place any restrictions on the email address format.
However, it does suggest to use a numeric LHS since many legacy
voice mail systems only use digits to identify mailboxes. Further,
it suggests 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.
[VPIM3] 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
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LHS format. A format based on GSTN Addressing [GSTN] is
presented.
3. VPIM v2 Addressing
RFC 822 addresses are based on the domain name system. This
naming system has two components: the local part, used for
username or mailbox identification; and the host part, used for
global machine identification.
The local part of the email address shall be a US-ASCII string
uniquely identifying a mailbox on a destination system. For
voice messaging, the local part is a printable string containing
the mailbox ID of the originator or recipient. While alpha
characters and long mailbox identifiers are permitted, most voice
mail networks rely on numeric mailbox identifiers to retain
compatibility with the limited 10 digit telephone keypad. As a
result, many voice messaging systems may only be able to handle a
numeric local part. The reception of alphanumeric local parts on
these systems may result in: the address being mapped to some
locally unique (but confusing to the recipient) number, the
address being deleted (but still delivered), or in the worst case
the entire message being rejected. Additionally, it may be
difficult to create messages on these systems with an
alphanumeric local part without complex key sequences or some
form of directory lookup.
In the absence of a global directory, specification of the local
part is expected to conform to international or private telephone
numbering plans. It is likely that private numbering plans will
prevail and these are left for local definition. However, it is
recommended that public telephone numbers be noted according to
the international numbering plan described in [E.164]. The
indication that the local part is a public telephone number is
given by a preceding `+' (the `+' would not be entered from a
telephone keypad, it is added by the system as a flag). Since
the primary information in the numeric scheme is contained by the
digits, other character separators (e.g. `-') may be ignored
(i.e. to allow parsing of the numeric local mailbox) or may be
used to recognize distinct portions of the telephone number (e.g.
country code). The specification of the local part of a VPIM
address can be split into the four groups described below:
1) mailbox number
- for use as a private numbering plan (any number of digits)
- e.g. 2722@lucent.com
2) mailbox number+extension
- for use as a private numbering plan with extensions
any number of digits, use of `+' as separator
- e.g. 2722+111@lucent.com
3) +international number
- for international telephone numbers conforming to E.164
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maximum of 15 digits
- e.g. +16137637582@nortelnetworks.com
4) +international number+extension
- for international telephone numbers conforming to E.164
maximum of 15 digits, with an extension (e.g. behind a
PBX) that has a maximum of 15 digits.
- e.g. +17035245550+230@ema.org
Deployed VPIM v2 systems typically support the first group, that is
mailbox number on the LHS. Note that in many case the mailbox is
simply the local number (e.g., in North America the 10-digit NANP
number is used).
4. VPIM v3 Addressing
VPIM Version 3 places no restrictions on the form of the Internet
address. VPIM Version 3 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.
4.1.1 VPIM v3 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.
Telephone numbers sent in a VPIM Version 3 submission mode MUST be
sent in one of the following forms.
This is based on the format defined in [PSTN-ADDR].
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"
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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 ]
ext-addr-spec = [ ext-sep sub-addr ]
ext-sep = ( "/EXT=" / "+" )
; note that "/EXT=" is case INSENSITIVE
; "+" is used for compatibility with current
; VPIM addressing
For clarity, here is an example of a very simple vpim-mbox:
VPIM=6137637582
4.1.2 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
4.1.3 The AMIS address
For voice messages that are intended to be sent as AMIS (Audio
Messaging Interchange Specification) voice mail messages, 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
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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.
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 [12]
; specification and per [AMISA] - 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 "+"
; [AMISA] 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)
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For more clarity, here is an example of a simple AMIS-A amis-
mbox:
AMIS=+1/401+3278144+/SYSNUM=1+401+3279542+
4.1.4 The fax address
As defined in [FAX-ADDR]
4.2 VPIM v3 Submission Addresses
Based on RFC2303, these are the resultant email addresses for the
LHS presented above. VPIM v3 systems that support submission MUST
accept, translate (if necessary), and forward messages sent to these
addresses.
4.2.1 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.
4.2.2 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.
4.2.3 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
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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.
4.2.4 The fax-email
As defined in [FAX-ADDR]
5. 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.
[E164] CCITT Recommendation E.164 (1991), Telephone Network and ISDN
Operation, Numbering, Routing and Mobile Service - Numbering Plan
for the ISDN Era.
[GSTN] Allocchio, C., "GSTN Address Element Extensions in e-mail
Services", <draft-ietf-fax-fulladdr-06.txt>, Work In Progress
[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.
[VPIM3] Vaudreuil, Greg, Parsons, Glenn, "Voice Profile for Internet
Mail, Version 3", <draft-ema-vpimv3-00.txt>, Work in progress.
[FAX-ADDR] Allocchio, C., "Minimal FAX address format in Internet
Mail", RFC 2304, March 1998.
[PSTN-ADDR] Allocchio, C., "Minimal PSTN address format in Internet
Mail", RFC 2303, March 1998.
6. Security Considerations
None beyond those already identified in [VPIM2] and [VPIM3].
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7. Author's Address
Glenn W. Parsons
Nortel Networks
P.O. Box 3511, Station C
Ottawa, ON K1Y 4H7
Phone: +1-613-763-7582
Fax : +1-613-763-4461
Email: gparsons@nortelnetworks.com
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
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."
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9. Appendix A: IANA Registration form for new value of GSTN
address service-selector "VPIM"
To: IANA@isi.edu
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-ema-vpim-address-01.txt.
Security Considerations:
See the Security Consideration section of "VPIM
Addressing", draft-ema-vpim-address-01.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 : +1-613-4461
Email: gparsons@nortelnetworks.com
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10. Appendix B: IANA Registration form for new value of GSTN
address service-selector "VOICE"
To: IANA@isi.edu
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-ema-vpim-address-01.txt.
Security Considerations:
See the Security Consideration section of "VPIM
Addressing", draft-ema-vpim-address-01.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 : +1-613-4461
Email: gparsons@nortelnetworks.com
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11. Appendix C: IANA Registration form for new value of GSTN
address service-selector "AMIS"
To: IANA@isi.edu
Subject: Registration of new values for the GSTN address
service-selector specifier "AMIS"
service-selector name:
AMIS
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-ema-vpim-address-01.txt.
Security Considerations:
See the Security Consideration section of "VPIM
Addressing", draft-ema-vpim-address-01.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 : +1-613-4461
Email: gparsons@nortelnetworks.com
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12. Appendix D: IANA Registration form for new value of GSTN
address qualit-type1 keyword and value "SYSNUM"
To: IANA@isi.edu
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-
ema-vpim-address-01.txt.
Use Restriction:
The use of "SYSNUM" is restricted to "AMIS" service-
selector, is it has no meaning outside the AMIS service.
Security Considerations:
See the Security Consideration section of "VPIM
Addressing", draft-ema-vpim-address-01.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 : +1-613-4461
Email: gparsons@nortelnetworks.com
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