Designed to work with FreePBX and PBXact, Sangoma IP phones are so smart you can quickly and easily use them right out of the box. To use this item as advertised you will need to be on FreePBX Distro version 13 or newer to take full advantage of the phone's enhanced features. While the Sangoma s705 is a standard SIP phone the device will be best suited with FreePBX Distro or PBXact The Sangoma s705 is a full feature set phone with four Session Initiation Protocol (SIP) accounts and a competitive price point. The s705 IP phone can quickly locate FreePBX / PBXact to automatically and easily get full configuration right out of the box – true Zero Touch Configuration. The s705 features industry standard Power over Ethernet, so no power cable or outlets required. It has full duplex speakerphone, dual gigabit Ethernet ports, five-way conference calling, high definition voice quality, built in Virtual Private Network (VPN) capability, WiFi and Bluetooth capable.