Chapter 6. Telnet Server
Important note: A thorough and in-depth explanation of Telnetis beyond the scope
and purpose of this document. The majority of material on the Telnetserver is
covered in the AS/400e Information Center under the TCP/IP topic. For more
information see “TCP/IP Topicsin the Information Center” on page xv.
The topics that remain in this chapter include conceptual and reference information
on the Telnetserver 3270 and VTxxx full-screen modes, and ASCII line and Printer
pass-through modes. Also in this chapter,you will find the following topics:
vTelnetscenarios for establishing cascaded sessions
vworkstation type negotiations and mappings
vsystem API enhancement, including a discussion on dynamic application printing
with TCP/IP

Setting Up the Telnet Server

This material is covered in the AS/400e Information Center under the TCP/IP
topic. For more information see “TCP/IP Topicsin the Information Center” on
page xv.

Determining Which Emulation Is Negotiated

Todetermine which type of emulation an autoselected Telnet client session
negotiates, the type of virtual device that is created should be examined by the
WRKDEVD QPADEV* command. For both VT220 and VT100, the virtual device
type that is created is V100. For virtual printer sessions, the device type that is
created is 3812 for single byte and 5553 for double byte.

5250 Full-Screen Mode

This material is covered in the AS/400e Information Center under the TCP/IP
topic. For more information see “TCP/IP Topicsin the Information Center” on
page xv.

Examples of 5250 Server to 5250 Full-Screen Telnet Client

This topic describes some practical experiences of a 5250 full-screen Telnetserver
with different 5250 clients.
OS/2
Apple Macintosh

OS/2 5250 Full-Screen Telnet Client

IBM TCP/IP Version2.0 for OS/2 provides a 5250 full-screen Telnet client (TN5250).
TN5250 can be started either by clicking on the TN5250 icon or from an OS/2
command line. For example:
[C:\]tn5250 sysnam123
The session is ended by selecting
Exit
from the menu bar.
© Copyright IBM Corp. 1997, 1999 183
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