CATEGORY Yeastar IP-PBX S-Series IP-PBX S20 IP PBX Up to 20 Users, 10 Concurrent Calls, Modular VoIP PBX for SMBs, Easy-to-Use with Unified Communications S50 IP PBX VoIP Phone System for up to 50 Users, Modular PBX with Auto Provisioning, Unified Communications S100 IP PBX Scalable VoIP System for SMBs with Modular Expansion, Advanced UC, and Flexible Connectivity S300 IP PBX Enterprise-Grade Modular VoIP PBX for 300–500 Users with Full UC Features and Expandability.
