RFC 2217 (rfc2217) - Page 1 of 14

Telnet Com Port Control Option

Network Working Group                                           G. Clark
Request for Comments: 2217                           Cisco Systems, Inc.
Category: Experimental                                      October 1997


                     Telnet Com Port Control Option


Status of this Memo

   This memo defines an Experimental Protocol for the Internet
   community.  This memo does not specify an Internet standard of any
   kind.  Discussion and suggestions for improvement are requested.
   Distribution of this memo is unlimited.

Introduction

   This memo proposes a protocol to allow greater use of modems attached
   to a network for outbound dialing purposes.

Table of Contents
       1. Negotiation of the Com Port
          Control Option Protocol          ..................   5
       2. Com Port Configuration Commands  ..................   6
            Version
            Baud Rate
            Data Bit Size
            Parity
            Stop Bit size
       3. Special Com Port Control Commands .................   8
            XON/XOFF Flow Control
            HARDWARE Flow Control
            BREAK Signal
            DTR Signal
            RTS Signal
     4. Notification of Com Port and     ..................    12
        Modem Line Changes
     5. Flow Control                     ..................    13
     6. Security Considerations          ..................    13
     7. Author's Address                 ..................    14
     8. Reference Section                ..................    14

Discussion

   The Telnet protocol defines an interactive, character-oriented
   communications session.  It was originally designed to establish a
   session between a client and a remote login service running on a host
   [5].



Clark                         Experimental