# Recommendation I.130 (11/1988): Method for the characterization of telecommunication services supported by an ISDN and network capabilities of an ISDN

> recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q27051379](https://www.wikidata.org/wiki/Q27051379)  
**Source**: https://4ort.xyz/entity/recommendation-i-130-11-1988-method-for-the-characterization-of-telecommunication-services-supported-by-an-isdn-and-network-capabilities-of-an-isdn