# ISO/IEC 4335:1993/Amd 6:1995 — Withdrawn and superseded ISO standards

For ISO/IEC 4335:1993/Amd 6:1995, item title is Information technology —- Telecommunications and information exchange between systems — High-level data link control (HDLC) procedures — Elements of procedures — Amendment 6: Extension of HDLC sequence number modulus beyond 128; status code is 9599; successor is ISO/IEC 13239:2002; withdrawn / published date is 1995-11-16, recorded from its source on 2026-08-05.

- **Identifier:** ISO/IEC 4335:1993/Amd 6:1995 _(verified: appears in the quote below)_
- **Item title:** Information technology —- Telecommunications and information exchange between systems — High-level data link control (HDLC) procedures — Elements of procedures — Amendment 6: Extension of HDLC sequence number modulus beyond 128 _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/IEC 13239:2002
- **Withdrawn / published date:** 1995-11-16 _(verified: appears in the quote below)_

## What the source says

> 20928,IS,Amd,ISO/IEC 4335:1993/Amd 6:1995,Information technology —- Telecommunications and information exchange between systems — High-level data link control (HDLC) procedures — Elements of procedures — Amendment 6: Extension of HDLC sequence number modulus beyond 128,Technologies de l'information — Télécommunications et échange d'informations entre systèmes — Procédures de commande de liaison de données à haut niveau (HDLC) — Éléments de procédures — Amendement 6: Extension du module du numéro de séquence HDLC au-delà de 128,1995-11-16,5,['35.100.20'],ISO/IEC JTC 1/SC 6,9599,,[37010],['en'],12,<p>This amendment increases the modulus number (i.e. the sequence number) in steps up to a maximu

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).