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Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12

superseded recommendation/international standard from the International Telecommunication Union
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Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12

Summary

Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12 is an ITU-T recommendation version[1].

Key Facts

  • Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12's instance of is recorded as Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12 — instance of (P31): ITU-T recommendation version[2].
  • Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12's publisher is recorded as Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12 — publisher (P123): ITU Telecommunication Standardization Sector[3].
  • Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12's edition number is recorded as 11/1988[4].
  • Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12's language of work or name is recorded as Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12 — language of work or name (P407): English[5].
  • Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12's publication date is recorded as +1988-11-25T00:00:00Z[6].
  • Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12's official website is recorded as https://www.itu.int/rec/T-REC-U.15-198811-S/en[7].
  • Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12's work available at URL is recorded as https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-U.15-198811-S!!PDF-E&type=items[8].
  • Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12's number of pages is recorded as {'unit': '1', 'amount': '+12'}[9].
  • Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12's standards body is recorded as Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12 — standards body (P1462): International Telecommunication Union[10].
  • Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12's title is recorded as Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12[11].
  • Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12's ITU-T Recommendation is recorded as U.15 (11/1988)[12].

Body

Authorship and Creation

Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12's publisher is recorded as Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12 — publisher (P123): ITU Telecommunication Standardization Sector[3].

Publication

Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12's publication date is recorded as +1988-11-25T00:00:00Z[6]. Its language of work or name is recorded as Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12 — 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 U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12. Retrieved May 3, 2026, from https://4ort.xyz/entity/recommendation-u-15-11-1988-interworking-rules-for-international-signalling-systems-according-to-recommendations-u-1-u-11-and-u-12
MLA “Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/recommendation-u-15-11-1988-interworking-rules-for-international-signalling-systems-according-to-recommendations-u-1-u-11-and-u-12.
BibTeX @misc{4ortxyz_recommendation-u-15-11-1988-interworking-rules-for-international-signalling-systems-according-to-recommendations-u-1-u-11-and-u-12_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12}}, year = {2026}, url = {https://4ort.xyz/entity/recommendation-u-15-11-1988-interworking-rules-for-international-signalling-systems-according-to-recommendations-u-1-u-11-and-u-12}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Recommendation U.15 (11/1988): Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12 — https://4ort.xyz/entity/recommendation-u-15-11-1988-interworking-rules-for-international-signalling-systems-according-to-recommendations-u-1-u-11-and-u-12 (retrieved 2026-05-03)

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