RFC 689 · UNKNOWN · 1975
MON · 15 JUN 2026
Tenex NCP finite state machine for connections
Overview
RFC 689, “Tenex NCP finite state machine for connections”, is an Unknown document published in May 1975 by R. Clements. The canonical text is published by the RFC Editor.
Abstract
Describes the internal states of an NCP connection in the TENEX implementation.
What “Unknown” means
The standards-track status of this early RFC was never formally classified.
Read this RFC
The canonical text of RFC 689 is hosted at rfc-editor.org. Available in TXT,HTML.
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