# Recommendation X.96 (11/1988): Call progress signals in public data networks

> superseded recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q27051534](https://www.wikidata.org/wiki/Q27051534)  
**Source**: https://4ort.xyz/entity/recommendation-x-96-11-1988-call-progress-signals-in-public-data-networks