http://www.rfc-editor.org/rfc/rfc1143.txt
RFC 1143: The Q Method of Implementing TELNET Option Negotiation, D.J. Bernstein1990-02-01T23:00:00-00:00This is RFC discusses an implementation approach to option negotiation in the Telnet protocol (RFC 854). It does not propose any changes to the TELNET protocol. Rather, it discusses the implementation of the protocol of one feature, only. This is not a protocol specification. This is an experimental method of implementing a protocol.