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Minimal FAX address format in Internet Mail (RFC3192) Disclosure Number: IPCOM000005881D
Original Publication Date: 2001-Oct-01
Included in the Prior Art Database: 2001-Nov-14
Document File: 12 page(s) / 19K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

C. Allocchio: AUTHOR


This memo describes a simple method of encoding Global Switched Telephone Network (GSTN) addresses of facsimile devices in the local-part of Internet email addresses.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 18% of the total text.

Network Working Group                                       C. Allocchio

Request for Comments: 3192                                    GARR-Italy

Obsoletes: 2304                                             October 2001

Updates: 2846

Category: Standards Track

              Minimal FAX address format in Internet Mail

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 (2001).  All Rights Reserved.


   This memo describes a simple method of encoding Global Switched

   Telephone Network (GSTN) addresses of facsimile devices in the

   local-part of Internet email addresses.

1. Introduction

   As with all Internet mail addresses, the left-hand-side (local-part)

   of an address generated according to this specification, is not to be

   interpreted except by the MTA that is named on the right-hand-side


   Since the very first e-mail to fax gateway objects appeared, a number

   of different methods to specify a fax address as an e-mail address

   have been used by implementors.  Several objectives for this methods

   have been identified, like to enable an e-mail user to send and

   receive faxes from his/her e-mail interface, to allow some kind of

   "fax over e-mail service" transport (possibly reducing the costs of

   GSTN long distance transmissions) while using the existing e-mail


   This memo describes the MINIMAL addressing method and standard

   extensions to encode FAX addresses into e-mail addresses, as required

   in reference [13].  The opposite problem, i.e., to allow a

   traditional numeric-only fax device user to access the e-mail

   transport service, is not discussed here.

Allocchio                   Standards Track                     [Page 1]

RFC 3192      Minimal FAX address format in Internet Mail   October 2001

   These IANA forms used to register the standard elements defined here

   are given in the "IANA Considerations" chapter (section 7 of this


   All implementations supporting FAX over e-mail address format MUST

   support this minimal specification.

1.1 Terminology and Syntax conventions

   In this document the formal definitions are described using ABNF

   syntax, as defined into [7].  We will also use some of the "CORE

   DEFINITIONS" defined in "APPENDIX A - CORE" of that document.  The

   exact meaning of the capitalized words



   is defined in reference [6].

   In this document the following new terms are also defined:

      I-fax device:

         an I-pstn device type [13] which is able to communicate either

         directly or indirectly with the traditional FAX over GSTN



         the Internet domain name which identifies uniquely an I-fax

         device over the Internet (see also mta-I-pstn in [13]);


         the complete Internet e-mail address structure which is used to

         transport a FAX...