Guidelines for Optional Services for Internet Fax Gateways
2005
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. This memo provides information for the Internet
community.
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