# ISO 22670:2006 — Withdrawn and superseded ISO standards For ISO 22670:2006, item title is Space data and information transfer systems — Space link extension (SLE) — Return-channel-frames service; status code is 9599; successor is ISO 22670:2013; withdrawn / published date is 2006-03-31, recorded from its source on 2026-08-05. - **Identifier:** ISO 22670:2006 _(verified: appears in the quote below)_ - **Item title:** Space data and information transfer systems — Space link extension (SLE) — Return-channel-frames service _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 22670:2013 - **Withdrawn / published date:** 2006-03-31 _(verified: appears in the quote below)_ ## What the source says > 36395,IS,,ISO 22670:2006,Space data and information transfer systems — Space link extension (SLE) — Return-channel-frames service,Systèmes de transfert des informations et données spatiales — Extension de liaisons spatiales (SLE) — Service de réseau pour liaison retour,2006-03-31,1,['49.140'],ISO/TC 20/SC 13,9599,,[61744],['en'],145,"
ISO 22670:2006 specifies a return-channel-frames (RCF) service for a space link extension (SLE). The RCF service is an SLE transfer service that delivers to a mission user all telemetry frames from one master channel or one virtual channel.
It defines, in an abstract manner, the RCF service in terms of