Omnitec Accoustic Coupler Manual?

[Jeff G]

Hey all! I have an Omnitec 701 acoustic coupler, with both an RS-232 and
TTY jack on the back. Would anyone happen to have any manuals or schematics
for this? As far as I can tell its not working, but it may be that I need
to get a handshake tone specific to a 300 baud modem to get it to do
something. I'd also like to see how it hooks up to a TTY!

Thanks,

Jeff