AOH :: AOH Originals
This tiny MS-DOS program emulates the ITU-T R2 signaling
tones (forward) plus R1 (North American Blue Box) and
DTMF, along with a decent array of SF and MF trunk seizure
tones. It requires an old PC and sound card or a newer one
with excellent legacy Adlib support. NOTE: There is a
Windows update for this program - see R2GEN.ZIP!