minimodem(1) on Linux
The text d5c257b0b761, as Debian 7 (Wheezy) shipped it.
software audio Bell-type or RTTY FSK modem
Flags it lists
-
--ascii -
--auto-carrier -
--bandwidth -
--baudot -
--confidence -
--file -
--mark -
--quiet -
--space -
--txstopbits -
--version -
-5 -
-8 -
-M -
-S -
-T -
-V -
-a -
-b -
-c -
-f -
-q