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Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)

superseded recommendation/international standard from the International Telecommunication Union
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Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)

Summary

Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN) is an ITU-T recommendation version[1].

Key Facts

  • Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)'s instance of is recorded as Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN) — instance of (P31): ITU-T recommendation version[2].
  • Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)'s publisher is recorded as Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN) — publisher (P123): ITU Telecommunication Standardization Sector[3].
  • Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)'s edition number is recorded as 11/1988[4].
  • Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)'s language of work or name is recorded as Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN) — language of work or name (P407): English[5].
  • Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)'s publication date is recorded as +1988-11-25T00:00:00Z[6].
  • Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)'s official website is recorded as https://www.itu.int/rec/T-REC-X.30-198811-S/en[7].
  • Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)'s work available at URL is recorded as https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-X.30-198811-S!!PDF-E&type=items[8].
  • Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)'s number of pages is recorded as {'unit': '1', 'amount': '+46'}[9].
  • Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)'s standards body is recorded as Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN) — standards body (P1462): International Telecommunication Union[10].
  • Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)'s title is recorded as Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)[11].
  • Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)'s ITU-T Recommendation is recorded as X.30 (11/1988)[12].

Body

Authorship and Creation

Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)'s publisher is recorded as Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN) — publisher (P123): ITU Telecommunication Standardization Sector[3].

Publication

Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)'s publication date is recorded as +1988-11-25T00:00:00Z[6]. Its language of work or name is recorded as Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN) — 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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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 X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN). Retrieved May 3, 2026, from https://4ort.xyz/entity/recommendation-x-30-11-1988-support-of-x-21-x-21-bis-and-x-20-bis-based-data-terminal-equipments-dtes-by-an-integrated-services-digital-network-isdn-
MLA “Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN).” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/recommendation-x-30-11-1988-support-of-x-21-x-21-bis-and-x-20-bis-based-data-terminal-equipments-dtes-by-an-integrated-services-digital-network-isdn-.
BibTeX @misc{4ortxyz_recommendation-x-30-11-1988-support-of-x-21-x-21-bis-and-x-20-bis-based-data-terminal-equipments-dtes-by-an-integrated-services-digital-network-isdn-_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN)}}, year = {2026}, url = {https://4ort.xyz/entity/recommendation-x-30-11-1988-support-of-x-21-x-21-bis-and-x-20-bis-based-data-terminal-equipments-dtes-by-an-integrated-services-digital-network-isdn-}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Recommendation X.30 (11/1988): Support of X.21, X.21 bis and X.20 bis based data terminal equipments (DTEs) by an integrated services digital network (ISDN) — https://4ort.xyz/entity/recommendation-x-30-11-1988-support-of-x-21-x-21-bis-and-x-20-bis-based-data-terminal-equipments-dtes-by-an-integrated-services-digital-network-isdn- (retrieved 2026-05-03)

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