Yeastar S20 IP PBX 20user, 10channel. Main Unit is suitable for a maximum of 20 team members, accommodating 20 incoming SIP (VoIP) lines with the ability to manage 10 concurrent calls. It’s a standalone system providing a wide range of features to help companies enhance their communication strategy. Some of the standard features you can expect include call routing, auto-attendant (IVR), call recording, call monitoring, call waiting, queue calls, music on hold, video calling and more. It is also compatible with Linkus Cloud Service which is a mobile unified communication solution that integrates the Yeastar S20 with iOS and Android Devices providing desktop, mobile and web clients to manage contacts and communications.