The FCC rules provide the following definitions for fax: Image. Facsimile and television emissions having designators with A, C, D, F, G, H, J or R as the first symbol; 1, 2 or 3 as the second symbol; C or F as the third symbol; and emissions having B as the first symbol; 7, 8 or 9 as the second symbol; W as the third symbol.
Facsimile. A form of telegraphy for the transmission of fixed images, with or without half-tones, with a view to their reproduction in a permanent form. (RR) Telegraphy. A form of telecommunication in which the transmitted information is intended to be recorded on arrival as a graphic document; the transmitted information may sometimes be presented in an alternative form or may be stored for subsequent use. (CS) Since it can be transmitted in either analog or digital form with almost any kind of modulation and there are no encoding restrictions, a fax seems to be any printable document -- even if it isn't printed immediately. 73, John KD6OZH ----- Original Message ----- From: KV9U To: digitalradio@yahoogroups.com Sent: Monday, November 27, 2006 04:25 UTC Subject: Re: [digitalradio] Fast HF Modem Development Re: OFDM data D1D Which has made me wonder why so few digital hams send FAX images on the phone bands. I still would like to get a clear understanding of just how far we can go here in the U.S. with what constitutes a FAX.