Grandstream Ucm6304a (Ip PBX System)

Grandstream UCM6304A (IP PBX System) A high-capacity on-premise IP PBX / unified communications server designed for medium to large organizations, supporting voice calls, extensions, conferencing, and remote collaboration via SIP and mobile apps. Specifications: • Up to 1000 SIP users (extensions) • Up to 150 concurrent calls (G.711) • Based on Asterisk v16 telephony platform • Built-in audio conferencing (multiple meeting rooms, up to ~120 participants total depending on setup) • Supports Wave app (mobile, desktop, web) for calls, messaging, and collaboration • 3 × Gigabit Ethernet ports (LAN/WAN/switch modes) with PoE+ support • Integrated NAT router and firewall traversal for remote users • Supports SIP trunking, IVR, call routing, voicemail, call queues • USB and SD storage support for backups and recordings