Yeastar P570
Users: 300 (up to 500), 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: 2*EX30/EX08+2*D30, External Storage: USB, HDD
Users: 300 (up to 500), 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: 2*EX30/EX08+2*D30, External Storage: USB, HDD