Minimal GSTN address format in Internet Mail

Abstract

This memo describes a simple method of encoding Global Switched Telephone Network (GSTN) addresses (commonly called "telephone numbers") 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 GSTN-based services.

Minimal FAX address format in Internet Mail

“…I-fax device: an I-pstn device type [13] which is able to communicate either directly or indirectly with the traditional FAX over GSTN service;…”

“…mta-I-fax: the Internet domain name which identifies uniquely an I-fax device over the Internet (see also mta-I-pstn in [13]); fax-email: the complete Internet e-mail address structure which is used to transport a FAX address over the Internet e-mail service (see also pstn-email in [13]). …”

“…The minimal fax address within e-mail has been defined for consistency with reference [13] and it contains two elements: the fax-mbox and an optional qualif-type1 element.…”

“…More precisely the GSTN minimal address specification requires the use of a unique service-selector for each specific application (section 2 in [13]). …”

“…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.…”