Yeastar P520-UP Ultimate Plan Feature Subscription for P520 PBX System, 1 year

Ultimate Plan includes everything that is in the Enterprise Plan, plus:
•Video Conferencing
•WebRTC Video Calls
•Active Directory Integration
Enterpriese Plan includes:
CALL CENTER
Switchboard-type Queue Panel
Real-time Metrics on Wallboard
SLA for Performance Measurement
Insightful Call Center Reports
LINKUS CLOUD SERVICE
Must-have for Remote Working
Private and Secure Tunnel
Effortless Linkus Server Setup
Better Linkus Call Quality
Charged per PBX per year