RFC - 4161

Guidelines for Optional Services for Internet Fax Gateways

Original:	ftp://ftp.isi.edu/in-notes/rfc4161.txt
Authors:	K. Mimura [TOYO Communication Equipment], K. Yokoyama [TOYO Communication Equipment], T. Satoh [TOYO Communication Equipment], K. Watanabe [TOYO Communication Equipment], C. Kanaide [TOYO Communication Equipment]
Date:	August 2005
Category:	Informational

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Referred by:	1 RFC
Refers to:	21 RFC

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Status

This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2005).

Abstract

To allow connectivity between the general switched telephone network facsimile service (GSTN fax) and the e-mail-based Internet Fax service (i-fax), an "Internet Fax Gateway" is required. This document provides guidelines for the optional functionality of Internet Fax Gateways. In this context, an "offramp gateway" provides facsimile data transmission from i-fax to GSTN fax; vice versa, an "onramp gateway" provides data transmission from GSTN fax to i-fax. The recommendations in this document apply to the integrated service including Internet Fax terminals, computers with i-fax software on the Internet, and GSTN fax terminals on the GSTN.

This document supplements the recommendation for minimal features of an Internet Fax Gateway. In particular, it covers techniques for dropping duplicated fax messages, automatic fax re-transmission, error, return notice, and log handling, and possible authorization methods by DTMF (Dual Tone Multi-Frequency) for onramp gateways.

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