GXP Series IP Phones – GXP1628 Product Description GXP16282 SIP accounts, 2 lines Dual-switched 10/100/1000 Mbps ports, integrated PoE 3-way audio conferencing See also different: Intercoms & PA – GSC3510 Facility Access Systems – GDS3710 Wi-Fi Cordless IP Phones – WP820 GXV IP Video Phones – GXV3350