smdiag(8) on Linux
The text 3b7ab4f3b1cd, as Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge), Debian 3.0 (Woody) shipped it.
Linux soundcard packet radio modem driver diagnostics utility
Flags it lists
-
-c -
-d -
-e -
-h -
-i