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<h1 id="main-title">TDD Modems</h1>
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<div id="intro-container"><div class="truncate"><div class="attr SYMPTOMS"><div class="attr TOPIC"><FONT SIZE=4><BR>
<BR>
What companies manufacture modems that can communicate with deaf or<BR>
hearing-impaired TDD (Telecommunication Device for the Deaf) users?<BR>
<BR>
</FONT></div></div> <!--  attr Symptom  --></div> <!--  truncate --></div> <!--  intro-container --><div class="clear"> </div>
 </div>   <!-- abstract end -->
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  <div class="attr SUMMARY">
Krown Research and UltraTec make 300-baud/TDD modems.  You can find their<BR>
addresses and phone numbers in separate articles in the Tech Info library <BR>
by searching on their company names.<BR>
<BR>
These modems require a special cable to connect to the computer. They can<BR>
be used with a Macintosh or Apple II system equipped with an RS-232 serial<BR>
port.  Use the 300-baud modem setting.<BR>
<BR>
You can use MacTerminal 2.3.1 with these modems.   MacTerminal 3.0 will not<BR>
work with the TDD modems.<BR>
<BR>
For a normal modem to communicate with a TDD Modem, change the TDD settings<BR>
to ASCII and 300 baud, and set the normal modem to 300 baud and TTY.<BR>
<BR>
<BR></div>
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<div class="mod-date">Published Date: Feb 18, 2012</div>
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