HP-UX TN3270 Administration Guide

Understanding TN3270
What Is TN3270?
Chapter 120
Sessions dialog box. For more information about these dialog boxes, refer
to the TN3270 Users Guide.
TN3270 does not provide support for the following functions that are
described in the various RFCs that are supported:
• The device type IBM-DYNAMIC. The device type that corresponds to
the configured display model is used instead.
• Keep-alive messages, although it does respond to them. If a TCP/IP
connection is lost, the loss is detected when the user presses a key
that causes data to be sent to the host.
• The SYSREQ key on non-TN3270E connections.
• Renegotiation of device type, LU, or TN3270E functions on a
connection that is already open.