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Comments on Telnet Protocol Changes (RFC0393)

IP.com Disclosure Number: IPCOM000003569D
Original Publication Date: 1972-Oct-03
Included in the Prior Art Database: 2000-Sep-13
Document File: 3 page(s) / 9K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J.M. Winett: AUTHOR

Abstract

Through this RFC, I am registering my objection to two of the three suggestions for changing the TELNET protocol as described in RFC 328 and am adding my suggestion for the interpretation of the TELNET Reverse Break Control Code.

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 30% of the total text.

Network Working Group

Request for Comments: 393 Joel M. Winett

NIC 11585 Lincoln Laboratory

Categories: TELNET LL-67

References: RFC 109, 139, 158,318, and 328 3 October 1972

Comments on TELNET Protocol Changes

Through this RFC, I am registering my objection to two of the

three suggestions for changing the TELNET protocol as described in RFC

328 and am adding my suggestion for the interpretation of the TELNET

Reverse Break Control Code.

1. Hide-your-input

This code was originally put in the TELNET protocol to give the

virtual terminal the ability to simulate a real terminal which has the

print suppress capability. If the terminals being used at some

installations do not have the ability to disable the printing

mechanism, the TELNET being used can either ignore this code or

attempt to simulate the function using other means (e. g., blacking

out a number of character positions and returning to the first

character position). Every attempt should be made to allow a network

user of a time-sharing system to have the same facilities as a local

user of the time-sharing system. The specification of TELNET protocol

should not limit the function of users if a function cannot be

supported by all users.

The "Hide-your-input" and "Echo" TELNET control codes provide for the

support of two functions available in some time-sharing systems. The

"Hide-your-input" function is really a special case of the "Echo" mode

of operation where the server tells the user that the server will echo

but the server does not. A separate code is used for this func- tion

since some servers may support this function but may not support the

full "Echo" mode of operation.

] This material has not been reviewed for public release and is [

] intended only for use with the ARPA network. It should not be [

] quoted or cited in any publication not related to the ARPA [

] network. [

The "Hide-your-input" and "Echo" modes of operation are disabled with

the "No-echo" control. ASCII control codes could have been chosen for

these functions but it was decided that the NVT ASCII control codes

should only be specified for commonly used functions.

To indicate the number of characters for which the printing should be

suppressed, the "Hide-your-input" TELNET control could be rede- fined

to include a byte following the "Hide-your-input" control to indicate

the number of characters for which the printing should be concealed.