# Recommendation U.1 (11/1988): Signalling conditions to be applied in the international telex service

> superseded recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q27051466](https://www.wikidata.org/wiki/Q27051466)  
**Source**: https://4ort.xyz/entity/recommendation-u-1-11-1988-signalling-conditions-to-be-applied-in-the-international-telex-service