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The CyberData SIP-enabled IP Outdoor Intercom/door Controller is a Power over Ethernet (PoE 802.3af) and VoIP (Voice over IP) two-way communication and door entry device with an integral 12-key backlit keypad.
The SmartNode 4171 series is the next-generation ISDN T1/E1 model of the proven market-leading SmartNode VoIP product family. It fits perfectly the requirements of small and medium-sized enterprises looking for cost-effective ways to bridge PBX systems on multiple sites or connect them to a public Internet telephony service.