Grandstream Audio IP PBX voice system support 4 FXO Port , 4 FXS Port
UCM6304A
- Supports up to 1000 users and up to 150 concurrent calls; 7 meeting rooms and up to 120 parties
 - 4 RJ11 Ports
 - Zero configuration provisioning of Grandstream SIP endpoints
 - Built-in Instant Messaging (IM), Audio Conferencing & Web Meetings platform that supports access from computers, mobile devices, and SIP endpoints
 - Free Wave App allows easy voice & Instant Messaging (IM) communications using desktops, Web, and Android/ iOS devices
 - API available for third-party integrations, including CRM and PMS platforms
 - Advanced security protection with secure boot, unique certificate and random default password to protect calls and accounts
 - Three Gigabit auto-sensing RJ45 network ports with integrated PoE+ and support NAT router
 - Automated NAT firewall traversal service facilitates secure remote connections
 - Enhanced reliability with support for Hot Standby High-Availability and local dual deployment
 - Supports Full-Band Opus voice codec, jitter resilience up to 50% packet loss
 - Compatible with GDMS for cloud setup, management and monitoring