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<h1 class="topictitle1">Dial mode (SNA)</h1>
<div><p>You use dial mode (that is used by Systems Network Architecture
(SNA) controller descriptions) to send a connection request to a remote device.</p>
<p>Dial mode starts when you vary on the controller
description. During the dialing process, the system polls the remote device
to determine if the device is ready to transmit. If the remote device is ready,
the connection process continues. Successful connection is still possible
even if the local and remote devices dial each other simultaneously.</p>
<p>These controller description fields control the frequency and duration
of the polling:</p>
<ul><li>LAN connection retry (<a href="rzajylancnntmrandlancnnrty.htm#lancnntmr_and_lancnnrty">LANCNNRTY</a>)
determines the number of times your system polls the remote device.</li>
<li>LAN connection timer (<a href="rzajylancnntmrandlancnnrty.htm#lancnntmr_and_lancnnrty">LANCNNTMR</a>)
determines the length of time between each poll.</li>
</ul>
<p>If the remote device answers the poll within the time that these parameters
specify, your system proceeds with establishing the connection. If not, your
system sends an inquiry message (CPA58E0 or CPA57EF) to the system operator
message queue. This message indicates that a connection attempt failed and
that the controller description is now in <a href="rzajuanswermode.htm#answer_mode">answer
mode</a>.</p>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzajuunderstandingwhentoconnect.htm" title="In a Systems Network Architecture (SNA) environment you can determine who initiates the connection request and who waits for an incoming connection request.">Which LAN device initiates the connection</a></div>
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