# Recommendation V.22bis (11/1988): 2400 bits per second duplex modem using the frequency division technique standardized for use on the general switched telephone network and on point-to-point 2-wire leased telephone-type circuits

> recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q26928837](https://www.wikidata.org/wiki/Q26928837)  
**Source**: https://4ort.xyz/entity/recommendation-v-22bis-11-1988-2400-bits-per-second-duplex-modem-using-the-frequency-division-technique-standardized-for-use-on-the-general-switched-telephone-network-and-on-point-to-point-2-wire-leased-telephone-type-circuits