The Yeastar S20 is a compact, modular IP PBX designed for small offices and branches of up to 20 users with 10 simultaneous calls. It ships with free expansion-module slots so you can mix FXS, FXO, GSM/4G and BRI ISDN ports on one appliance — perfect for moving from analog or GSM lines onto SIP without throwing away your existing telco connections.
It runs Yeastar's mature K2 firmware with IVR, ring groups, voicemail-to-email, call recording, VPN server, hot-desking and conferencing — every feature unlocked with no licensing fees or per-user costs.
Key Features
No per-user licensing — every feature unlocked from day one
Mix FXS / FXO / GSM / 4G / BRI modules on the same chassis
Linkus UC mobile & desktop softphones included
Auto-provisions Fanvil, Yealink and most SIP phones
Built-in call recording with downloadable CDR exports
