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Telnet 3270 regime option (RFC1041)

IP.com Disclosure Number: IPCOM000001847D
Original Publication Date: 1988-Jan-01
Included in the Prior Art Database: 2019-Feb-15
Document File: 6 page(s) / 7K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

Y. Rekhter: AUTHOR

Related Documents

10.17487/RFC1041: DOI

Abstract

This RFC specifies a proposed standard for the Internet community. Hosts on the Internet that want to support 3270 data stream within the Telnet protocol, are expected to adopt and implement this standard.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 33% of the total text.

Network Working Group J. Rekhter Request For Comments: 1041 T.J. Watson Research Center, IBM January 1988

Telnet 3270 Regime Option

STATUS OF THIS MEMO

This RFC specifies a proposed standard for the Internet community. Hosts on the Internet, that want to support 3270 data stream within the Telnet protocol, are expected to adopt and implement this standard. Distribution of this memo is unlimited.

1. Command Name and Code

3270-REGIME 29

2. Command Meaning

IAC WILL 3270-REGIME

Sender is willing to send list of supported 3270 Regimes in a subsequent sub-negotiation.

IAC WON’T 3270-REGIME

Sender refuses to send the list of supported 3270 Regimes.

IAC DO 3270-REGIME

Sender is willing to receive a list of supported 3270 Regimes in a subsequent sub-negotiation.

IAC DON’T 3270-REGIME

Sender refuses to accept the list of supported 3270 Regimes.

IAC SB 3270-REGIME ARE REGIME-LIST IAC SE

Sender sends the list of all possible 3270 Regimes it is able to support. The code for ARE is 1.

REGIME-LIST is an ASCII string which has meaning to both sides of the negotiation. This string may be composed of different terminal type names (as specified in the "Assigned Numbers") which are separated by space character. Terminal type names which have

Rekhter [Page 1]

RFC 1041 Telnet 3270 Regime Option January 1988

imbedded spaces should escape it with backslash character (’\’). Backslash character imbedded into terminal type name should be escaped with another backslash character.

Empty REGIME-LIST means, that sender is able to support only NVT ASCII terminal as defined in [4].

IAC SB 3270-REGIME IS REGIME IAC SE

Sender is stating the name of the terminal it is willing to support. The code for IS is 0.

REGIME is an ASCII string (possibly empty) which is substring of the received REGIME-LIST string. Empty string means that the sender is willing to support only NVT ASCII terminal as defined in [4].

3. Default

WON’T 3270-REGIME

3270 Regime will not be established.

DON’T 3270-REGIME

3270 Regime will not be established.

4. Motivation for the option

This option allows a telnet server running VM or MVS to negotiate with the telnet client on the type of data stream (3270 or NVT ASCII) which both sides are willing support.

The main reason for this option is to allow simple and efficient way to:

o state, that both client and server want to exchange 3270 data stream,

o switch from 3270 Regime into NVT ASCII Regime and back into 3270 Regime,

o dynamically renegotiate 3270 Regime parameters (like terminal type).

Rekhter [Page 2]

RFC 1041 Telnet 3270 Regime Option January 1988

Support for 3270 data stream requires that both sides:

o be able to exchange binary data,

o be able to put well defined delimiters into inbound/outbound data stream,

o be able to establish the agreement between client and server on what type of terminal will be used.

Current implementations requires 3 different options, TERMINALTYPE [1], BINARY [2] and EOR [3], to be successfully negotiated between client and se...

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