# Recommendation Q.932 (11/1988): Generic procedures for the control of ISDN supplementary services

> superseded recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q27051441](https://www.wikidata.org/wiki/Q27051441)  
**Source**: https://4ort.xyz/entity/recommendation-q-932-11-1988-generic-procedures-for-the-control-of-isdn-supplementary-services