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  • 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



Product Datasheet
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Grandstream UCM6308 IP PBX

The UCM6308 is an easy to manage device that does not require licensing fees and can support up to 6000 users and up to 400 concurrent calls. It features advanced technology including three Gigabit auto-sensing RJ45 network ports with integrated PoE+ and support for a NAT router. This enterprise-grade IP PBX can be integrated with third-party CRMs and PMS allowing for custom integrations.

The Grandstream UCM6300 Series of IP PBX’s have been designed with business of all sizes in mind, creating a unified communications solution that is robust and scalable. Moreover, the UCM6300 Series can be managed through the Grandstream Device Management System (GDMS) allowing for cloud-based setup, easy management and monitoring.