The Yeastar P560 IP PBX is a modular VoIP phone system designed for small to medium businesses, supporting 100 users (expandable to 200) and 30 concurrent calls (expandable to 60) with hybrid telephony, UC features, advanced call handling, and flexible expansion options.

The Yeastar S300 IP PBX is a modular enterprise‑grade VoIP phone system supporting up to 300 users (expandable to 500) and 60 concurrent calls (up to 120), rich telephony features, and flexible expansion options — ideal for SMEs, branch offices, and scalable unified communications deployments.a