Yeastar P570 PBX

Users: 300 (up to 500 with 2 * D30 module added)
Max Concurrent Calls: 60 (up to 120)
Max Analog Ports: 16
Max BRI Ports: 16
Max Cellular Ports: 6
Max E1/T1/J1 Ports: 2
Expansion Boards possible: 2*EX30/EX08+2*D30
External Storage possible: USB, HDD