IP Intercom- Vandal Resistant-16 Guage S - - 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