# Recommendation X.217 (11/1988): Association control service definition for Open Systems Interconnection for CCITT applications

> superseded recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q27051513](https://www.wikidata.org/wiki/Q27051513)  
**Source**: https://4ort.xyz/entity/recommendation-x-217-11-1988-association-control-service-definition-for-open-systems-interconnection-for-ccitt-applications