Grandstream UCM6308

Here’s a comprehensive overview of the Grandstream UCM6308 IP PBX, tailored for larger-scale deployments such as medium-to-large organizations, campuses, or multi-branch setups:

    Capacity & Core Performance

• User support: Up to 3,000 users with 450 total concurrent calls (≈300 when using SRTP encryption) 

• Conferencing:

  • Audio bridge: Up to 300 participants

  • Video conferencing: Supports 8 rooms with up to 60 participants at 1080p 

    Ports & Hardware

• Analog interfaces:

  • 8 FXO ports (PSTN trunk lines)

  • 8 FXS ports (analog phones/fax with lifeline) 

• Networking:

  • 3× Gigabit RJ45 ports with PoE+ support (acts as switch/router) 

• Expansion and storage:

  • 2× USB-A 3.0 ports

  • 1× SD‑card slot for local recording or storage

• Front panel:

  • 320×240 color touchscreen for ease of use 

    Unified Communications Features

• Zero‑config provisioning for Grandstream SIP devices

• Built-in audio & video conferencing, instant messaging, auto-attendants, IVR, call queues, recording, fax-to-email, and CDR logs 

• Wave collaboration app supports desktop/mobile chat, voice, and video 

• Supports advanced codecs: Opus, G.711/722, G.729, T.38 fax, and video codecs like H.264/H.263/H.265/VP8 

    Security & Networking

• Enterprise-grade security: Secure boot, unique certificates, SRTP/TLS/HTTPS, firewall with automatic NAT traversal, and Hot‑Standby HA capability 

• Supports GDMS for remote monitoring, management, and upgrade automation