# Recommendation T.90 (11/1988): Characteristics and protocols for terminals for telematic services in ISDN

> recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q26928849](https://www.wikidata.org/wiki/Q26928849)  
**Source**: https://4ort.xyz/entity/recommendation-t-90-11-1988-characteristics-and-protocols-for-terminals-for-telematic-services-in-isdn