# ISO 6159:1980 — Withdrawn and superseded ISO standards

For ISO 6159:1980, item title is Data communication — HDLC unbalanced classes of procedures; status code is 9599; successor is ISO/IEC 7809:1991; withdrawn / published date is 1980-05-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 6159:1980 _(verified: appears in the quote below)_
- **Item title:** Data communication — HDLC unbalanced classes of procedures _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/IEC 7809:1991
- **Withdrawn / published date:** 1980-05-01 _(verified: appears in the quote below)_

## What the source says

> 12405,IS,,ISO 6159:1980,Data communication — HDLC unbalanced classes of procedures,Téléinformatique — Classes de procédure HDLC non équilibrée,1980-05-01,1,['35.100.20'],ISO/IEC JTC 1/SC 6,9599,,[14707],"['en','fr']",6,

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).