/usr/bin/dtmfcheck
/usr/bin/measerl
/usr/bin/playwav
/usr/bin/proslicerl
/usr/bin/raw2wav
/usr/bin/recwav
/usr/bin/ringstat
/usr/bin/tonedebug
/usr/bin/tonegen
/usr/bin/tonetrain
/usr/bin/vdaaerl
/usr/bin/vpbecho
You may install this package on Debian with
apt-get
install vpb-utils