[GreenKeys] Solid State TTY machines

[Larry Tighe]

Hi Greenkeyists,

What are the audio freqs. and shift used by these TDD/TTY for the deaf and 
speech impaired?

Are they simple FSK?  Anyone ever used one on RTTY?

I see some of these even print out the incoming msg.  I don't know if they 
have pre-programmed text.

Curious minds want to know :>)

Lar
K2JIA
www.antiquetelephone.com



 http://cgi.ebay.com/ULTRATECH-SUPERPRINT-4425-TTY_W0QQitemZ130043694123QQihZ003QQcategoryZ3313QQrdZ1QQcmdZViewItem