- SMB IP PBX with 4 FXO and 2 FXS Ports- Supports up to 500 users, 50 SIP trunks, and up to 45 concurrent calls- Zero configuration provisioning of Grandstream SIP endpoints- SRTP, TLS, and HTTPS encryption- Dual Gigabit network ports with integrated PoE- Supports up to a 5-level IVR- Built-in call recording server; access recordings via web user interface- Supports call queue- Built-in Call Detail Recordings (CDR) for tracking phone usage by line, date, etc.- Multi-language auto attendant- Integrated LDAP and XML phonebooks- Supports any SIP video endpoint that uses the H.264, H.263, or H.263+ codecs- Supports voicemail and fax forwarding to email- USB and SD ports- Up to 3 password protected conference bridges that allow up to 25 simultaneous PSTN or IP participants