# Recommendation F.61 (11/1988): Operational provisions relating to the chargeable duration of a telex call

> recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q27051345](https://www.wikidata.org/wiki/Q27051345)  
**Source**: https://4ort.xyz/entity/recommendation-f-61-11-1988-operational-provisions-relating-to-the-chargeable-duration-of-a-telex-call