Supports up to 1000 users and up to 120 concurrent calls 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 Based on Aster