Yeastar P-Series Software Edition Ultimate Plan — Annual Enterprise PBX Subscription with Disaster Recovery

Yeastar P-Series Software Edition Ultimate Plan is the top-tier annual subscription for the Yeastar unified communications system, built for B2B organizations with complex communication workflows, development teams embedding voice into proprietary applications, and multi-site business continuity requirements. The platform installs on the organization's own server and includes the full feature set of all lower plans plus capabilities available exclusively at the Ultimate tier.

Licensing is based on the number of simultaneous calls — meaning how many phone conversations are happening at the same time across your organization, including internal calls between employees. If 20 staff members are on calls at the same moment, you need at least 20SC. Ultimate Plan covers configurations from 4SC/400 extensions up to 1024SC/10,000 extensions, providing full flexibility for growing organizations or companies with variable communication volumes.

Beyond Enterprise Plan, Ultimate adds a visual drag-and-drop Call Flow Designer for code-free call routing automation, integrated video conferencing with screen sharing, Linkus SDKs for embedding voice into custom business applications on any platform, Windows Active Directory integration for centralized user management, real-time audio stream transmission via WebSocket, and Disaster Recovery with automatic replication between geographically separate sites. The Yeastar Central Management console provides full visibility and control over all PBX instances across the organization, with real-time monitoring and secure remote access.

Ultimate Plan is the right choice for large B2B organizations with complex automated communication workflows, companies building products or services with embedded voice that need production-ready SDKs, IT teams managing Active Directory infrastructure who require centralized user synchronization, UCaaS providers operating multi-tenant platforms, and businesses in critical sectors where multi-site communication continuity is a contractual or operational requirement.