RFC 1184 (rfc1184) - Page 1 of 23

Telnet Linemode Option

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Network Working Group                               Telnet Working Group
Request for Comments: 1184                             D. Borman, Editor
Obsoletes: RFC 1116                                  Cray Research, Inc.
                                                            October 1990


                         Telnet Linemode Option

Status of this Memo

   This memo describes a Draft Standard for the Internet community, and
   requests discussion and suggestions for improvements.  This RFC
   specifies an IAB standards track protocol for the Internet community.
   Please refer to the current edition of the "IAB Official Protocol
   Standards" for the standardization state and status of this protocol.
   Distribution of this memo is unlimited.

Changes from RFC 1116:

      Two new mode bits have been added, SOFT_TAB and LIT_ECHO.  These
      bits allow the server to give the client some advise on how to
      echo tabs and non-printable characters.

      Several new special character mappings have been added for cursor
      motion when visual editing is supported.  These are: Move cursor
      one character left/right (SLC_MCL/SLC_MCR), move cursor one word
      left/right (SLC_MCWL/SLC_MCWR), move cursor to begining/end of
      line (SLC_MCBOL/SLC_MCEOL), enter insert/overstrike mode
      (SLC_INSRT/SLC_OVER), erase one character/word to the right
      (SLC_ECR/SLC_EWR), and erase to the beginning/end of the line
      (SLC_EBOL/SLC_EEOL).

Overview

   Linemode Telnet is a way of doing terminal character processing on
   the client side of a Telnet connection.  While in Linemode with
   editing enabled for the local side, network traffic is reduced to a
   couple of packets per command line, rather than a couple of packets
   per character typed. This is very useful for long delay networks,
   because the user has local response time while typing the command
   line, and only incurs the network delays after the command is typed.
   It is also useful to reduce costs on networks that charge on a per
   packet basis.  Please send comments to the 
   mailing list.







Telnet Working Group
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