[GreenKeys] ASR33 modem

[B M]

On my ASR-33, an Anderson-Jacobson acoustic coupled modem (ADT-233) is
installed.  Does anyone have information on this modem?  I have
googled around, but have only come across the patent for the device,
but no further information.

I am looking to connect the TTY up to my ancient PDP-11 computer, but
I need to be sure the modem is sufficiently disconnected for the
direct connection.

Thanks!

--barrym