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Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control

superseded recommendation/international standard from the International Telecommunication Union
CreativeWork itu_t_recommendation_version Q26985446
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Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control

Summary

Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control is an ITU-T recommendation version[1].

Key Facts

  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's instance of is recorded as ISDN user-network interface layer 3 specification for basic call control — instance of (P31): ITU-T recommendation version[2].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's publisher is recorded as ISDN user-network interface layer 3 specification for basic call control — publisher (P123): ITU Telecommunication Standardization Sector[3].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's edition number is recorded as 11/1988[4].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's language of work or name is recorded as ISDN user-network interface layer 3 specification for basic call control — language of work or name (P407): English[5].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's publication date is recorded as +1988-11-25T00:00:00Z[6].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's official website is recorded as http://www.itu.int/rec/T-REC-Q.931-198811-S/en[7].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's work available at URL is recorded as https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-Q.931-198811-S!!PDF-E&type=items[8].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's number of pages is recorded as {'unit': '1', 'amount': '+352'}[9].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's standards body is recorded as ISDN user-network interface layer 3 specification for basic call control — standards body (P1462): International Telecommunication Union[10].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's title is recorded as ISDN user-network interface layer 3 specification for basic call control[11].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation E.163 (11/1988): Numbering plan for the international telephone service[12].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation E.164 (11/1988): Numbering plan for the ISDN era[13].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation F.69 (11/1988): Plan for telex destination codes[14].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation G.711 (11/1988): Pulse code modulation (PCM) of voice frequencies[15].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation G.721 (11/1988): 32 kbit/s adaptive differential pulse code modulation (ADPCM)[16].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation G.722 (11/1988): 7 kHz audio-coding within 64 kbit/s[17].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation G.725 (11/1988): System aspects for the use of the 7 kHz audio codec within 64 kbit/s[18].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation H.261 (11/1988): Video codec for audiovisual services at p x 384 kbit/s[19].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation I.230 (11/1988): Definition of bearer service categories[20].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation I.231.1 (11/1988): Circuit-mode bearer service categories : Circuit-mode 64 kbit/s unrestricted, 8 kHz structured bearer service[21].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation I.231.2 (11/1988): Circuit-mode bearer service categories : Circuit-mode 64 kbit/s, 8 kHz structured bearer service usable for speech information transfer[22].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation I.231.3 (11/1988): Circuit-mode bearer service categories : Circuit-mode 64 kbit/s, 8 kHz structured bearer service usable for 3.1 kHz audio information transfer[23].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation I.231.4 (11/1988): Circuit-mode bearer service categories : Circuit-mode, alternate speech / 64 kbit/s unrestricted, 8 kHz structured bearer service[24].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation I.231.5 (11/1988): Circuit-mode bearer service categories : Circuit-mode 2 x 64 kbit/s unrestricted, 8 kHz structured bearer service[25].
  • Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's cites work is recorded as ISDN user-network interface layer 3 specification for basic call control — cites work (P2860): Recommendation I.231.6 (11/1988): Circuit-mode bearer service categories : Circuit-mode 384 kbit/s unrestricted, 8 kHz structured bearer service[26].

Body

Authorship and Creation

Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's publisher is recorded as ISDN user-network interface layer 3 specification for basic call control — publisher (P123): ITU Telecommunication Standardization Sector[3].

Publication

Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control's publication date is recorded as +1988-11-25T00:00:00Z[6]. Its language of work or name is recorded as ISDN user-network interface layer 3 specification for basic call control — 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.
  22. [23] ↑ . wikidata.org.
  23. [24] ↑ . wikidata.org.
  24. [25] ↑ . wikidata.org.
  25. [26] ↑ . 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 Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control. Retrieved May 3, 2026, from https://4ort.xyz/entity/recommendation-q-931-11-1988-isdn-user-network-interface-layer-3-specification-for-basic-call-control
MLA “Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/recommendation-q-931-11-1988-isdn-user-network-interface-layer-3-specification-for-basic-call-control.
BibTeX @misc{4ortxyz_recommendation-q-931-11-1988-isdn-user-network-interface-layer-3-specification-for-basic-call-control_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control}}, year = {2026}, url = {https://4ort.xyz/entity/recommendation-q-931-11-1988-isdn-user-network-interface-layer-3-specification-for-basic-call-control}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Recommendation Q.931 (11/1988): ISDN user-network interface layer 3 specification for basic call control — https://4ort.xyz/entity/recommendation-q-931-11-1988-isdn-user-network-interface-layer-3-specification-for-basic-call-control (retrieved 2026-05-03)

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