Yeastar S50 IP PBX 50user, 25channel. It is designed for medium sized businesses, and is suitable for a maximum of 50 team members with the ability to handle 25 concurrent calls. Standard features the S50 provides include caller ID; call waiting; video calls; conference calling; call monitoring, call recording and more. Integrating the S50’s APIs enables variable call features and advanced reporting capabilities. The S50 can be connected to Linkus to provide a unified solution for managing calls and contacts for internal or external communication purposes