Grandstream UCM6304, IP PBX appliance, 4 FXO ports, 4 FXS ports, Dual GigE RJ45 Ethernet ports with PoE Plus

Supports up to 3000 users and up to 450 simultaneous calls. Zero configuration of endpoints SIP Grandstream Built-in platform for conferences and meetings; supports Desktop, Wave application and SIP endpoints Wave for browsers Android, iOS, Chrome and Firefox allows you to communicate with all users and UCM6300 solutions. API is available for third-party integration, including CRM and PMS platforms. Advanced protection with secure boot, a unique certificate and a random default password to protect calls and accounts. Three Gigabit RJ45 network ports with automatic recognition, built-in PoE+ and a NAT-enabled router. Automatic Firewall Bypass Service NAT provides secure remote connections. Supports full-range voice codec Opus and H.264/H.263/H.263+/H.265/VP8 video codec, jitter resistance up to 50% packet loss. Compatible with GDMS for configuring, managing and monitoring the cloud. Based on the open source telephony operating system Asterisk* version 16.