Multimedia Call Handoff Across Logged-In User Terminals

The patent segments the call establishment process by terminal identification. Each terminal (first terminal, second terminal, etc.) is treated as an independent entity with its own call status. The system checks whether each specific terminal is already in a multimedia call before allowing a new call on that terminal, rather than imposing a global restriction across all terminals. This segmentation enables multiple terminals to participate in calls simultaneously while maintaining clear operational boundaries for each terminal.

The patent introduces a server as an intermediary to manage call establishment across multiple terminals. The server receives call requests, identifies the calling terminal, checks call status information associated with that terminal, and controls call establishment. This intermediary approach centralizes the complexity of managing multiple simultaneous calls, preventing the complexity from being distributed across client terminals. The server maintains call status information for each terminal and makes the determination about whether additional calls can be established, simplifying the client-side implementation while enabling enhanced user experience.