# Recommendation X.92 (11/1988): Hypothetical reference connections for public synchronous data networks

> recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q27051532](https://www.wikidata.org/wiki/Q27051532)  
**Source**: https://4ort.xyz/entity/recommendation-x-92-11-1988-hypothetical-reference-connections-for-public-synchronous-data-networks