Corrections to RFC 560: Remote Controlled Transmission and Echoing Telnet Option
RFC 581

Document Type RFC - Unknown (November 1973; No errata)
Updates RFC 560
Last updated 2013-03-02
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Network Working Group                                         D. Crocker
Request for Comments: 581                                       UCLE-NMC
NIC: 19860                                                     J. Postel
References: RFC 560, RFC 563                                   MITRE-TIP
Categories: Protocols, TELNET, RCTE                        November 1973

                          Corrections to RFC 560
          Remote Controlled Transmission & Echoing TELNET Option

                                                                   1a

   [This RFC contains corrections to RFC 560 (NIC -- 18492,) which
   described the Remote Controlled Transmission and Echoing TELNET
   Option.  A completely updated version of 18492 has been journalized
   and will be included in the Protocols Notebook.  These new
   specifications for RCTE are in NIC document (19859,).]          2

   Section 1 of the RCTE Option specification (18492,2a:gy) was supposed
   to include the name and code for the option.  The code was
   accidentally left out.  That statement should read:
                                                                   3

      RCTE  7                                                      3a

   Section 2 should include the End of Subnegotiation Parameter, at the
   end of the subnegotiation parameter specification (18492,2b5:gy).
   All examples in the option specifications, showing RCTE SB commands,
   should also show the IAC SE parameter. (The revised RCTE
   specifications have been so changed.) Section 2 should be changed so
   that it reads:                                                  4

      IAC SB RCTE <cmd> [BC1 BC2] [TC1 TC2] IAC SE                 4a

   The sample scenario, in Section 5.D (18492,2e4:gy), should be
   modified to reflect the kind of asynchrony of events that can occur
   with the RCTE protocol.  The updated RCTE specifications (in --
   19859,1e4:gy) now reflects this.                                5

   In RFC 563 (18755,) John Davidson criticizes RCTE's apparent failure
   to allow Net I/O and server computation to overlap.             6

   I agree with John's criticisms and feel that the following should fix
   the problem:                                                    7

Crocker & Postel                                                [Page 1]
RFC 581         Remote Controlled Transmission & Echoing   November 1973

   1. Change 5.A (18492,2e1)                                       7a

      from:                                                        7a1

         Overview of Interaction                                   7a1a

      to:                                                          7a2

         Overview of User Terminal Printing Action & Control       7a2a

   2. Change 5.B.5.a (18492,2e2e1)                                 7b

      from:                                                        7b1

         A Transmission character is one which REQUIRES the User Host to
         transmit all text accumulated up to and including its
         occurrence. (For Net efficiency, User hosts are DISCOURAGED
         from sending before the occurrence of a Transmission
         character).                                               7b1a

      to:                                                          7b2

         A Transmission character is one which RECOMMENDS that the Using
         Host transmit all text accumulated up to and including its
         occurrence. (For Net efficiency, Using hosts are DISCOURAGED
         from sending before the occurrence of a Transmission character,
         as defined at the moment the character is typed).
         7b2a

   3. Change 5.B.5.b (18492,2e2e2)                                 7c

      from:                                                        7c1

         A Break character has the effect of a Transmission character,
         but also causes the Using host to stop its print/discard action
         upon the User's input text, until directed to do otherwise by
         another IAC SB RCTE <cmd> IAC SE command from the Serving host.
         Break characters therefore define printing units.  "Break
         character" as used in this document does NOT mean Telnet Break
         character.            7c1a

      to:                                                          7c2

         A Break character REQUIRES that the Using host transmit all
         text accumulated up to and including its occurrence and also
         causes the Using host to stop its print/discard action upon the
         User's input text, until directed to do otherwise by another
         IAC SB RCTE <cmd> IAC SE command from the Serving host.  Break

Crocker & Postel                                                [Page 2]
RFC 581         Remote Controlled Transmission & Echoing   November 1973

         characters therefore define printing units.  "Break character"
         as used in this document does NOT mean Telnet Break character.
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