CATEGORY Yeastar IP-PBX S-Series IP-PBX S-20 Compact entry-level small business phone system Easy to use, reliable and feature-rich S-50 Full-featured rack-mountable IP-PBX built for small business, With superior UC capacity S-100 Simple, powerful and scalable IP-PBX system Designed for SMBs with less than 200 users S-300 Enterprise-class IP-PBX system built to perform, Supports 300 users and expandable to 500 users. Digital Myth Solutions (DMS) Is the Main and the first market Distributor of Yeastar products and solutions in Saudi Arabia. Yeastar S50 in Saudi Yeastar S100 in Saudi Yeastar S300 in Saudi Yeastar S20 in Saudi Yeastar Support