# Recommendation I.252.5 (11/1988): Call offering supplementary services: Call Deflection (CD)

> superseded recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q26985389](https://www.wikidata.org/wiki/Q26985389)  
**Source**: https://4ort.xyz/entity/recommendation-i-252-5-11-1988-call-offering-supplementary-services-call-deflection-cd-