r?

<p>

<li><b>What other communications equipment is involved?</b> &ndash; An X.25
PAD?  A 3270 protocol converter?  A terminal server?  An intermediate
computer?  etc etc...

<p>
<blockquote>
<i>

A serial connection (direct or dialup) must have an <b>effective form of
flow control</b> at every junction between computer (or terminal server, etc)
and modem.  This means that each pair of devices that are connected must be
using the <b>same</b> kind of flow control, usually either RTS/CTS (hardware)
or Xon/