# Recommendation X.87 (10/2003): Multiple services ring based on RPR

> recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q27051531](https://www.wikidata.org/wiki/Q27051531)  
**Source**: https://4ort.xyz/entity/recommendation-x-87-10-2003-multiple-services-ring-based-on-rpr