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<h1 class="topictitle1">Configure Telnet server for 3270 full-screen mode</h1>
<div><p><span>Telnet client users can sign on and run 5250
full-screen applications using 3270 full-screen mode.</span></p>
<p>The server negotiates 3270 full-screen support with any Telnet client application
that supports 3270 full-screen applications, rather than 5250 full-screen
applications. An example of a system that negotiates 3270 full-screen support
is the IBM
S/390<sup>®</sup> family.</p>
<p>Telnet 5250 (TN5250) delivers the data stream between the two systems as
EBCDIC. Because the 3270 data streams are translated into 5250 data streams,
the workstation devices operate as a remote 5251 display to the iSeries™ server
and application programs.</p>
<p>After you have completed the general configuration of the Telnet server,
there are a few additional steps to enable server support for 3270 full-screen
mode. Full-screen mode is a "block" mode as opposed to a "line" mode. "Line"
mode is when data transmits one line at a time, whereas "block" or full-screen
mode transmits the whole screen at one time.</p>
<p>For information about supported 3270 device capabilities, refer to <a href="rzaiwdefcap3270dev.htm">Supported 3270 terminal types</a>.</p>
<p>For 3270 full screen considerations such as screen size, keyboard mapping,
cursor select key, and error messages and null characters, see <a href="rzaiwmanage3270.htm">3270 Telnet client sessions</a>.</p>
<p>Complete the following tasks to configure the Telnet server for 3270 full-screen
mode:</p>
<ol><li><a href="#rzaiwmode3270__SPTCTQSV3270">Check the QKBDTYPE system value</a></li>
<li><a href="#rzaiwmode3270__SPTSTDKM3270">Set the default keyboard mapping</a></li>
<li><a href="#rzaiwmode3270__SPTCAKM3270">Change a keyboard map</a></li>
<li><a href="#rzaiwmode3270__SPTCMQ3270">Change message queue</a></li>
</ol>
<div class="section" id="rzaiwmode3270__SPTCTQSV3270"><a name="rzaiwmode3270__SPTCTQSV3270"><!-- --></a><h4 class="sectiontitle">Check the QKBDTYPE system value</h4><p>When
the iSeries Telnet
server automatically creates virtual display devices, it uses the QKBDTYPE
system value to determine the keyboard type for the virtual device.</p>
<p>If
the initial creation of the virtual device fails by using the QKBDTYPE system
value, the Telnet server uses the keyboard value USB to try to create the
device. If the second attempt to create the virtual display device fails using
the value of USB, then a message (CPF87D7) is sent to the system operator
message queue. This message indicates that the system cannot automatically
select the virtual device.</p>
</div>
<div class="section" id="rzaiwmode3270__SPTSTDKM3270"><a name="rzaiwmode3270__SPTSTDKM3270"><!-- --></a><h4 class="sectiontitle">Set the default keyboard mapping</h4><p>A
3270 display station connected to an iSeries server using Telnet appears to
be a 5251 display station to an iSeries server. The 3270 display station
keyboard has a 5251-equivalent keyboard map associated with it, which allows
it to complete 5251-equivalent functions on the iSeries server.</p>
<p>When a Telnet client
system user first signs on in 3270 full-screen mode, the iSeries server
automatically assigns the default keyboard map to the user's 3277, 3278, or
3279 keyboard. Avoid this by including a user-defined keyboard map in the
user's profile sign-on procedure. This supplies the mapping needed for the
3270 keyboards to do most of the same functions as their 5250-equivalent keyboards
do.</p>
</div>
<div class="section"><h4 class="sectiontitle">Display a keyboard map</h4>You can use the Display Keyboard
Map (DSPKBDMAP) command to see the current keyboard mapping. Another method
is to use option 6 (Display 3270 keyboard map) on the Configure TCP/IP Telnet
menu, while your terminal is in 3270 emulation mode.</div>
<div class="section" id="rzaiwmode3270__SPTCAKM3270"><a name="rzaiwmode3270__SPTCAKM3270"><!-- --></a><h4 class="sectiontitle">Change a keyboard map</h4><p>Use the Change
Keyboard Map (CHGKBDMAP) command if you want to make minor changes to the
default keyboard map. This command is available from the Configure TCP/IP
Telnet menu as option 7 (Change 3270 keyboard map).</p>
<p>If you want to set
a new keyboard map, use the Set Keyboard Map (SETKBDMAP) command. This command
is option 7 (Change 3270 keyboard map) on the Configure TCP/IP Telnet menu.
The key assignments that you specify are in effect until you use these commands
again to specify new key assignments or until you sign off.</p>
<div class="note"><span class="notetitle">Note:</span> The difference
between CHGKBDMAP and SETKBDMAP is that, with SETKBDMAP, the system applies
the defaults and then the changes in the SETKBDMAP are applied. With CHGKBDMAP,
the system applies defaults plus any changes that you have previously made
during this session, and then the changes in the CHGKBDMAP are applied.</div>
<p>For
more information about keyboard mapping see <a href="rzaiwkeybrdmap3270.htm">3270 keyboard mapping for Telnet servers</a>.</p>
</div>
<div class="section" id="rzaiwmode3270__SPTCMQ3270"><a name="rzaiwmode3270__SPTCMQ3270"><!-- --></a><h4 class="sectiontitle">Change message queue</h4><p>A message queue
is like a mail box for messages. The iSeries server has several message queues
that hold messages that provide helpful information when finding and reporting
problems. When your workstation message queue is in break mode, messages appear
on the 3270 device exactly as they appear on the 5250 display. To receive
messages in break mode, you must specify *BREAK on the change message queue
(CHGMSGQ) command. When your workstation is not in break mode, you receive
the following message: <tt>A message has arrived on a message queue</tt>.</p>
<p>To
retrieve this message and continue using the workstation, follow these steps:</p>
<ol><li>Press the function key assigned to the help function, or the function
key that is assigned to the error reset function.</li>
<li>Enter the Display Message (DSPMSG) command or the function key that is
assigned to the system request function followed by option 4 (Display Message)
to view the waiting message.</li>
<li>Set the workstation message queue to break mode to see the messages as
they arrive.</li>
</ol>
</div>
<div class="section"><h4 class="sectiontitle">Reset the display's input-inhibited light</h4><p>When using
an iSeries server
from a 5250-type terminal, pressing certain keys in certain situations causes
input to be inhibited. When this occurs, the 5250 terminal displays an input-inhibited
light.</p>
<p>Two asterisks shown in the lower-right corner of the display
indicate the input-inhibited light. When the keyboard is inhibited, any keys
mapped to the iSeries function
keys are ignored.</p>
<p>To reset the keyboard, press the Enter key, or press
the key mapped to the iSeries Reset key.</p>
</div>
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<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="rzaiwdefcap3270dev.htm">Supported 3270 terminal types</a></strong><br />
<span>This topic describes the capabilities of the
3270 devices that Telnet supports.</span></li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaiwemultypes.htm" title="The preferred emulation for the iSeries is 5250 emulation. However, the iSeries also supports 3270 and VTxxx emulation.">iSeries supported emulation types</a></div>
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