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+Network Working Group                                          J. Postel
+Request for Comments: 861                                    J. Reynolds
+                                                                     ISI
+Obsoletes: NIC 16239                                            May 1983
+
+                 TELNET EXTENDED OPTIONS - LIST OPTION
+
+
+This RFC specifies a standard for the ARPA Internet community.  Hosts on
+the ARPA Internet are expected to adopt and implement this standard.
+
+1.  Command Name and Code
+
+   EXTENDED-OPTIONS-LIST (EXOPL)     255
+
+2.  Command Meanings
+
+   IAC DO EXOPL
+
+      The sender of this command REQUESTS that the receiver of this
+      command begin negotiating, or confirms that the receiver of this
+      command is expected to begin negotiating, TELNET options which are
+      on the "Extended Options List".
+
+   IAC WILL EXOPL
+
+      The sender of this command requests permission to begin
+      negotiating, or confirms that it will begin negotiating, TELNET
+      options which are on the "Extended Options List".
+
+   IAC WON'T EXOPL
+
+      The sender of this command REFUSES to negotiate, or to continue
+      negotiating, options on the "Extended Options List".
+
+   IAC DON'T EXOPL
+
+      The sender of this command DEMANDS that the receiver conduct no
+      further negotiation of options on the "Extended Options List".
+
+   IAC SB EXOPL <subcommand>
+
+      The subcommand contains information required for the negotiation
+      of an option of the "Extended Options List".  The format of the
+      subcommand is discussed in section 5 below.
+
+3.  Default
+
+   WON'T EXOPL, DON'T EXOPL
+
+
+
+
+Postel & Reynolds                                               [Page 1]
+
+
+
+RFC 861                                                         May 1983
+
+
+      Negotiation of options on the "Extended Options List" is not
+      permitted.
+
+
+4.  Motivation for the Option
+
+   Eventually, a 257th TELNET option will be needed.  This option will
+   extend the option list for another 256 options in a manner which is
+   easy to implement.  The option is proposed now, rather than later
+   (probably much later), in order to reserve the option number (255).
+
+5.  An Abstract Description of the Option
+
+   The EXOPL option has five subcommand codes:  WILL, WON'T, DO, DON'T,
+   and SB.  They have exactly the same meanings as the TELNET commands
+   with the same names, and are used in exactly the same way.  For
+   consistency, these subcommand codes will have the same values as the
+   TELNET command codes (250-254).  Thus, the format for negotiating a
+   specific option on the "Extended Options List" (once both parties
+   have agreed to use it) is:
+
+      IAC SB EXOPL DO/DON'T/WILL/WON'T/<option code> IAC SE
+
+   Once both sides have agreed to use the specific option specified by
+   <option code>, subnegotiation may be required.  In this case the
+   format to be used is:
+
+      IAC SB EXOPL SB <option code> <parameters> SE IAC SE
+
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+Postel & Reynolds                                               [Page 2]
+