# Recommendation F.421 (11/1988): Message handling services: Intercommunication between the IPM service and the telex service

> recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q27051344](https://www.wikidata.org/wiki/Q27051344)  
**Source**: https://4ort.xyz/entity/recommendation-f-421-11-1988-message-handling-services-intercommunication-between-the-ipm-service-and-the-telex-service