Intercom Fanvil-i21-T, 2 SIP accounts, Compatible with standart SIP (RFC3261) protocol and main IPPBX/IMS platform, Support externel active speaker output port for HD quality (G.722) broadcasting, PoE 802,3af., High temperature range: -40°C to 70°C, Protection Level - IP65 and IK10, Equipped with specified screws to prevent vandalism