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From: speaker@ttidca.UUCP (Kenneth Speaker)
Newsgroups: comp.dcom.modems
Subject: Re: modem interface to TDD (deaf communications), how?
Message-ID: <294@ttidca.UUCP>
Date: Wed, 14-Jan-87 16:59:43 EST
Article-I.D.: ttidca.294
Posted: Wed Jan 14 16:59:43 1987
Date-Received: Wed, 21-Jan-87 21:45:49 EST
References: <763@sdcc12.ucsd.EDU>
Reply-To: speaker@ttidcb.UUCP (Kenneth Speaker)
Distribution: na
Organization: Citicorp TTI, Santa Monica
Lines: 17

In article <763@sdcc12.ucsd.EDU> wa371@sdcc12.ucsd.EDU (Bernd) writes:
>Is it possible somehow to use the typical 300 or 1200 baud modem to
>link up with a TDD (telecommunications device for the deaf)??
>TDD is a slow speed teletypewriter or sorts.  
...
>I tried it at various baud settings of my terminal through a PASSWORD
>modem.  But although my modem said "connect", I got only garbage.

I believe that TDD's use 5-level BAUDOT code at 75 baud.  If this is
correct, you need a translator, unless you have a PC-like device that
can fake it.  Ok course, then your intellegent modem might misunderstand
certain combinations of 5-bit characters...

Yes, aren't 75 baud, 37.5 baud and even 18.75 baud standards of yesteryear
wonderful?

--Kne