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Minimal PSTN address format in Internet Mail (RFC2303)

IP.com Disclosure Number: IPCOM000002868D
Original Publication Date: 1998-Mar-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 6 page(s) / 13K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

C. Allocchio: AUTHOR

Abstract

Since the very first e-mail to PSTN services gateway appeared, a number of different methods to specify a PSTN address as an e-mail address have been used by implementors. Two major objectives for this were

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 22% of the total text.

Network Working Group C. Allocchio

Request for Comments: 2303 GARR-Italy

Category: Standards Track March 1998

Minimal PSTN 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 (1998). All Rights Reserved.

IESG NOTE

This memo describes a simple method of encoding PSTN addresses in the

local-part of Internet email addresses, along with an extension

mechanism to allow encoding of additional standard attributes needed

for email gateways to PSTN-based services.

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

(domain).

1. Introduction

Since the very first e-mail to PSTN services gateway appeared, a

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

address have been used by implementors. Two major objectives for this

were

- enable an e-mail user to access these services from his/her

e-mail interface;

- enable some kind of "PSTN over e-mail service" transport, to

reduce the costs of PSTN long distance transmissions, and use the

existing e-mail infrastructure.

This memo describes the MINIMAL addressing method to encode PSTN

addresses into e-mail addresses and the standard extension mechanism

to allow definition of further standard elements. The opposite

problem, i.e. to allow a traditional numeric-only PSTN device user to

access the e-mail transport service, is not discussed here.

All implementations supporting this PSTN over e-mail service MUST

support as a minimum the specification described in this document.

The generic complex case of converting the whole PSTN addressing into

e-mail is out of scope in this minimal specification: there is some

work in progress in the field, where also a number of standard

optional extensions are being defined.

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 capitalised words

"MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD",

"SHOULD NOT", "RECOMMENDED", "MAY", "OPTIONAL"

is defined in reference [6].

2. Minimal PSTN address

The minimal specification of a PSTN address in e-mail address is as

follows:

pstn-address = pstn-mbox [ qualif-type1 ]

pstn-mbox = service...