# Recommendation I.112 (11/1988): Vocabulary of terms for ISDNs

> superseded recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q27051376](https://www.wikidata.org/wiki/Q27051376)  
**Source**: https://4ort.xyz/entity/recommendation-i-112-11-1988-vocabulary-of-terms-for-isdns