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Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification

superseded recommendation/international standard from the International Telecommunication Union
CreativeWork itu_t_recommendation_version Q26985443
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Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification

Summary

Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification is an ITU-T recommendation version[1].

Key Facts

  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's instance of is recorded as Primary rate user-network interface - Layer 1 specification — instance of (P31): ITU-T recommendation version[2].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's publisher is recorded as Primary rate user-network interface - Layer 1 specification — publisher (P123): ITU Telecommunication Standardization Sector[3].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's edition number is recorded as 11/1988[4].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's language of work or name is recorded as Primary rate user-network interface - Layer 1 specification — language of work or name (P407): English[5].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's publication date is recorded as +1988-11-25T00:00:00Z[6].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's official website is recorded as https://www.itu.int/rec/T-REC-I.431-198811-S/en[7].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's work available at URL is recorded as https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-I.431-198811-S!!PDF-E&type=items[8].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's number of pages is recorded as {'unit': '1', 'amount': '+32'}[9].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's standards body is recorded as Primary rate user-network interface - Layer 1 specification — standards body (P1462): International Telecommunication Union[10].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's title is recorded as Primary rate user-network interface - Layer 1 specification[11].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's cites work is recorded as Primary rate user-network interface - Layer 1 specification — cites work (P2860): Recommendation G.703 (11/1988): Physical/electrical characteristics of hierarchical digital interfaces[12].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's cites work is recorded as Primary rate user-network interface - Layer 1 specification — cites work (P2860): Recommendation G.704 (11/1988): Synchronous frame structures used at primary and secondary hierarchical levels[13].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's cites work is recorded as Primary rate user-network interface - Layer 1 specification — cites work (P2860): Recommendation G.706 (11/1988): Frame alignment and cyclic redundancy check (CRC) procedures relating to basic frame structures defined in Recommendation G.704[14].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's cites work is recorded as Primary rate user-network interface - Layer 1 specification — cites work (P2860): Recommendation G.812 (11/1988): Timing requirements at the outputs of slave clocks suitable for plesiochronous operation of international digital links[15].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's cites work is recorded as Primary rate user-network interface - Layer 1 specification — cites work (P2860): Recommendation I.411 (11/1988): ISDN user-network interfaces - Reference configurations[16].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's cites work is recorded as Primary rate user-network interface - Layer 1 specification — cites work (P2860): Recommendation I.412 (11/1988): ISDN user-network interfaces - Interface structures and access capabilities[17].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's cites work is recorded as Primary rate user-network interface - Layer 1 specification — cites work (P2860): Recommendation I.430 (11/1988): Basic user-network interface - Layer 1 specification[18].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's cites work is recorded as Primary rate user-network interface - Layer 1 specification — cites work (P2860): Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control[19].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's cites work is recorded as Primary rate user-network interface - Layer 1 specification — cites work (P2860): Recommendation I.604 (11/1988): Application of maintenance principles to ISDN primary rate accesses[20].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's cites work is recorded as Primary rate user-network interface - Layer 1 specification — cites work (P2860): Recommendation M.20 (11/1988): Maintenance philosophy for telecommunications networks[21].
  • Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's ITU-T Recommendation is recorded as I.431 (11/1988)[22].

Body

Authorship and Creation

Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's publisher is recorded as Primary rate user-network interface - Layer 1 specification — publisher (P123): ITU Telecommunication Standardization Sector[3].

Publication

Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification's publication date is recorded as +1988-11-25T00:00:00Z[6]. Its language of work or name is recorded as Primary rate user-network interface - Layer 1 specification — 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.
  12. [13] ↑ . wikidata.org.
  13. [14] ↑ . wikidata.org.
  14. [15] ↑ . wikidata.org.
  15. [16] ↑ . wikidata.org.
  16. [17] ↑ . wikidata.org.
  17. [18] ↑ . wikidata.org.
  18. [19] ↑ . wikidata.org.
  19. [20] ↑ . wikidata.org.
  20. [21] ↑ . wikidata.org.
  21. [22] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

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Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification. Retrieved May 3, 2026, from https://4ort.xyz/entity/recommendation-i-431-11-1988-primary-rate-user-network-interface-layer-1-specification
MLA “Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/recommendation-i-431-11-1988-primary-rate-user-network-interface-layer-1-specification.
BibTeX @misc{4ortxyz_recommendation-i-431-11-1988-primary-rate-user-network-interface-layer-1-specification_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification}}, year = {2026}, url = {https://4ort.xyz/entity/recommendation-i-431-11-1988-primary-rate-user-network-interface-layer-1-specification}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Recommendation I.431 (11/1988): Primary rate user-network interface - Layer 1 specification — https://4ort.xyz/entity/recommendation-i-431-11-1988-primary-rate-user-network-interface-layer-1-specification (retrieved 2026-05-03)

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