fxotune(8) on Linux
The text 22b6ec96a8c0, as Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
automatically tune DAHDI FXO channels
Flags it lists
-
-b -
-e -
-l -
-m -
-n -
-t -
-v -
-w