Description:? - Valcom Ip Intercom- Sip Doorphone With Door/Gate Relay- For Use With Cisco, Nortel, Avaya, And Most Modern Ip Telephone Solutions- Call Button Calls Any Sip Address Or Any Valcom Gateway- Automatic Talkback Vox Operation- Includes Long Line Extender - Up To 300 Meters- Easy, Rj45 Plug In, Cat 5 Or 6, Lan/Wan 10/100- Stainless Steel- For Security - Peer To Peer Or Many To One- Companion To Ip Cctv Cameras- Sip Or Multicast Softphone Adressable- Door Ajar Notification Feature- All Call 1000"S Of Unites With Valcom Gateway- Led Status Indicator- Weather Resistant And Tamper-Proof- Compatible With Secure - Supervision With Alert Functions- Web-Based Firmware Upgradeable- Web Interface For Control And Setup- Dhcp- High Survivability - No Servers NeededVcvip172lst