The Grandstream IP PBX appliance features four integrated FXO ports and two analogue telephone FXS ports. It is designed to unify multiple communications technology, including voice, video, data, and mobility, into a single easy-to-use device. Grandstream ensures comprehensive security protection using SRTP, TLS, and HTTPS. The integrated NAT route also includes a built-in firewall. The appliance features a 1 GHz ARM Cortex A8 processor, 512MB of RAM, and 4GB of flash memory. The dual gigabit RJ45 network ports use an integrated PoE Plus standard.