GXP Series IP Phones – GXP1610(P)/GXP1615 Product Description GXP1610(P)/GXP1615 1 SIP account, 2 lines Dual-switched 10/100 Mbps ports, integrated PoE (GXP1610P/PGXP1615 only) 3-way audio conferencing See also different: Intercoms & PA – GSC3506 v2 ATAs & Gateways – HT813 Business Conferencing – GVC3220 GXP Series IP Phones – GXP1620/GXP1625