Compact entry-level small business phone system Easy to use, reliable and feature-rich Easy to use. Powerful in Production Built for Small Business Yeastar S20 is a stand-alone PBX system with unrivalled range of features for business with less than 20 users. It’s built to be simple to use and powerful in production. Connect, communicate and collaborate the way you like With S20 to work with Yeastar Linkus UC softphone and Linkus Cloud Service, experience the ultimate convenience of doing business anywhere, on any device. Connect Eliminate complexity and connect on any device anywhere with Linkus UC Softphone. Communicate Voice, conferencing, messaging. Get all advanced features for smarter conversations. Collaborate Corporate Directory. Presence. File Sharing. It’s about the team-up. CRM Integration Salesforce CRM, Microsoft Dynamics 365,Outlook Contacts, Google Contacts… Flexible Modular Design Free Telephony Interfaces Combination With Yeastar S-Series, all the telephony interfaces are modular and customizable, S20 support 2 onboard module slots to custom FXS, FXO, ISDN BRI, GSM/3G/4G. Powerful Remote Management Benefit from a highly secure platform to monitor and manage your PBX system(s) remotely and centrally. Whether you are a phone system end user or a IT reseller, Yeastar Remote Management tool is here to free you from technical headaches and reduce IT & maintenance costs. Complete Built-in Features From basic call routing, IVR to advanced call conferencing and recording, Yeastar S-Series VoIP PBX provides you with all-inclusive features without extra licensing fees. Extra Capacity with App Center Independent from the main framework of the system, App Center allows you to add and manage Apps independently for extra functionality like hotel app, billing, call center integration, etc.