[comp.dcom.telecom] TTY/TDDs and Baudot

cuccia@MONET.BERKELEY.EDU (Nick Cuccia) (10/13/87)

Hello,

I have access to a TDD that my SO uses to call her deaf grandmother
in Connecticut.  I'm curious about how it works, but the manual that
came with it tells me nothing.  Therefore, I pose the following questions:

	(1) What form of Baudot does it use, and what five-bit codes
	    correspond to what characters/figures?  

	(2) What method is used for communication?  Is it a form of
	    Frequency-Shift Keying, and if so, what are the frequencies
	    used?

	(3) What data transfer rate is used, and what are corresponding
	    bit lengths?  

I would appreciate any answer, either directly concerning the above questions,
or that point to references that deal with TTY/TDD communication.

Thanks in advance,
--Nick Cuccia
--cuccia@ucbarpa.berkeley.edu