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--></style></head><body lang="EN-US" link="#0563C1" vlink="#954F72"><div class="WordSection1"><p class="MsoNormal">Here is a nice document that shows all the ways to do simple connections between all the serial standards, TTL, 232, 422, etc.</p><p class="MsoNormal">I just put it in my “how-to” folder:</p><p class="MsoNormal"><a href="http://www.ti.com/lit/an/snla041a/snla041a.pdf">http://www.ti.com/lit/an/snla041a/snla041a.pdf</a></p><p class="MsoNormal"> </p><p class="MsoNormal">Bob, WB4APR</p></div></body></html>