IP PBX Appliance

Supports up to 2000 SIP endpoint registrations, up to 200 concurrent calls and up to 64 conference attendees

1GHz quad-core Cortex A9 processor

1GB DDR3 Ram, 32GB Flash

1 Integrated T1/E1/J1 interface, 

UCM6202 and UCM6204 support up to 500 users and 30/45 concurrent calls, UCM6208 supports up to 800 users and 100 concurrent calls

Auto Discovery and Zero Configuration of Grandstream SIP endpoints

Connects and constantly monitors two UCM6510 together for high availability

Smart failover solution that automatically switches to a hot-standby secondary UCM6510 if the primary one fails