# Recommendation G.711 (11/1988): Pulse code modulation (PCM) of voice frequencies

> recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q27051359](https://www.wikidata.org/wiki/Q27051359)  
**Source**: https://4ort.xyz/entity/recommendation-g-711-11-1988-pulse-code-modulation-pcm-of-voice-frequencies