Intercoms & PA – GSC3510 Product Description GSC3510SIP Intercom Speaker & Mic Full-duplex speakerphone with HD acoustic chamber, advanced acoustic echo cancellation 3 directional mics Integrated Wi-Fi and Bluetooth ® One 10/100Mbps network port with PoE/ PoE+ 2-pin multi-purpose input See also different: Business Conferencing – GVC3220 DECT Cordless IP Phones – DP725 Wi-Fi Cordless IP Phones – WP836 GXP Series IP Phones – GXP2135