sendfax(8) on Linux
The text 366a369467b2, as Debian 3.0 (Woody), Debian 2.2 (Potato), Debian 2.1 (Slink) shipped it.
send group 3 fax files (G3 files) with a class 2 faxmodem
Flags it lists
-
-C -
-S -
-d -
-m -
-n -
-p -
-r -
-v