proslicerl(1) on Linux
The text 6dba8cfacfae, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it. The page shows this text now.
Measure the echo-return loss on Voicetronix FXS telephony modules
Flags it lists
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--card -
--help -
--impedance -
--playgain -
--port -
--recgain -
--scan -
-?