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Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)

superseded recommendation/international standard from the International Telecommunication Union
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Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)

Summary

Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs) is an ITU-T recommendation version[1].

Key Facts

  • Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)'s instance of is recorded as International user classes of service in public data networks and integrated services digital networks (ISDNs) — instance of (P31): ITU-T recommendation version[2].
  • Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)'s publisher is recorded as International user classes of service in public data networks and integrated services digital networks (ISDNs) — publisher (P123): ITU Telecommunication Standardization Sector[3].
  • Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)'s edition number is recorded as 11/1988[4].
  • Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)'s language of work or name is recorded as International user classes of service in public data networks and integrated services digital networks (ISDNs) — language of work or name (P407): English[5].
  • Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)'s publication date is recorded as +1988-11-25T00:00:00Z[6].
  • Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)'s official website is recorded as https://www.itu.int/rec/T-REC-X.1-198811-S/en[7].
  • Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)'s work available at URL is recorded as https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-X.1-198811-S!!PDF-E&type=items[8].
  • Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)'s number of pages is recorded as {'unit': '1', 'amount': '+8'}[9].
  • Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)'s standards body is recorded as International user classes of service in public data networks and integrated services digital networks (ISDNs) — standards body (P1462): International Telecommunication Union[10].
  • Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)'s title is recorded as International user classes of service in public data networks and integrated services digital networks (ISDNs)[11].
  • Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)'s ITU-T Recommendation is recorded as X.1 (11/1988)[12].

Body

Authorship and Creation

Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)'s publisher is recorded as International user classes of service in public data networks and integrated services digital networks (ISDNs) — publisher (P123): ITU Telecommunication Standardization Sector[3].

Publication

Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)'s publication date is recorded as +1988-11-25T00:00:00Z[6]. Its language of work or name is recorded as International user classes of service in public data networks and integrated services digital networks (ISDNs) — language of work or name (P407): English[5].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . wikidata.org.
  8. [9] ↑ . wikidata.org.
  9. [10] ↑ . wikidata.org.
  10. [11] ↑ . wikidata.org.
  11. [12] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

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APA 4ort.xyz Knowledge Graph. (2026). Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs). Retrieved May 3, 2026, from https://4ort.xyz/entity/recommendation-x-1-11-1988-international-user-classes-of-service-in-public-data-networks-and-integrated-services-digital-networks-isdns-
MLA “Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs).” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/recommendation-x-1-11-1988-international-user-classes-of-service-in-public-data-networks-and-integrated-services-digital-networks-isdns-.
BibTeX @misc{4ortxyz_recommendation-x-1-11-1988-international-user-classes-of-service-in-public-data-networks-and-integrated-services-digital-networks-isdns-_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs)}}, year = {2026}, url = {https://4ort.xyz/entity/recommendation-x-1-11-1988-international-user-classes-of-service-in-public-data-networks-and-integrated-services-digital-networks-isdns-}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Recommendation X.1 (11/1988): International user classes of service in public data networks and integrated services digital networks (ISDNs) — https://4ort.xyz/entity/recommendation-x-1-11-1988-international-user-classes-of-service-in-public-data-networks-and-integrated-services-digital-networks-isdns- (retrieved 2026-05-03)

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