- UCM6308 supports up to 3000 users and 450 concurrent calls
- Auto Discovery and Zero Configuration of Grandstream SIP endpoints
- Integrated 8 PSTN trunk FXO ports, 8 analog telephone FXS ports with lifeline capability and up to 50 SIP trunk accounts
- Three Gigabit auto-sensing RJ45 network ports with integrated PoE+ and support NAT router, USB, SD card etc.
- Supports up to a 5-level IVR (Interactive Voice Response)
- Built-in call recordings server; recordings accessible via web user interface
- Built-in Call Detail Records (CDR) for tracking phone usage by line, date, etc.
- Supports multi-language auto-attendant and call queue to efficiently handle incoming calls
- Strongest possible security protection using SRTP, TLS and HTTPS encryption
- Supports any SIP video endpoint that uses the H.264, H.263 or H.263+, H.265 codecs
- Compatible with GDMS for cloud setup, management and monitoring
- Automated NAT firewall traversal service facilitates secure remote connections