- SIP doorphone with door/gate relay - Power over Ethernet (PoE) compatible - Use with Cisco, Nortel, Avaya and most modern IP telephone systems - Call button calls any SIP address or any Valcom Gateway - Automatic talkback VOX operation (no push to talk button needed) - Includes long line extender - up to 300 meters between network interface and door speaker - Easy, RJ45 plug-in connection - Stainless steel, brass and vandal-resistant (11 gauge steel) - Companion to IP CCTV cameras - SIP or multicast communications - LED status indicator - Weather and tamper resistant - Compatible with secure networks - Supervision with alert functions - DHCP addressable - High survivability - no server needed