RFC 1647 (rfc1647) - Page 1 of 34

TN3270 Enhancements

Network Working Group                                          B. Kelly
Request for Comments: 1647                            Auburn University
Category: Standards Track                                     July 1994


                          TN3270 Enhancements

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Abstract

   This document describes a protocol that more fully supports 3270
   devices than do the existing tn3270 practices.  Specifically, it
   defines a method of emulating both the terminal and printer members
   of the 3270 family of devices via Telnet; it provides for the ability
   of a Telnet client to request that it be assigned a specific device-
   name (also referred to as "LU name" or "network name"); finally, it
   adds support for a variety of functions such as the ATTN key, the
   SYSREQ key, and SNA response handling.

   This protocol would be negotiated and implemented under a new Telnet
   Option and would be unrelated to the Telnet 3270 Regime Option as
   defined in RFC 1041 [1].

TABLE OF CONTENTS

   1.  Introduction ...............................................  2
   2.  TN3270E OVERVIEW ...........................................  3
   3.  COMMAND NAMES AND CODES ....................................  4
   4.  COMMAND MEANINGS ...........................................  5
   5.  DEFAULT SPECIFICATION ......................................  6
   6.  MOTIVATION .................................................  7
   7.  TN3270E SUB-NEGOTIATION RULES ..............................  7
      7.1  DEVICE-TYPE Negotiation ................................  7
          7.1.1 Device Pools ......................................  8
          7.1.2 CONNECT Command ...................................  9
          7.1.3 ASSOCIATE Command ................................. 10
          7.1.4 Device Selection Rules ............................ 10
          7.1.5 Accepting a Request ............................... 11
          7.1.6 REJECT Command .................................... 12
      7.2  FUNCTIONS Negotiation .................................. 13
          7.2.1 Commands .......................................... 13



Kelly