GXP Series IP Phones – GXP2140 Product Description GXP21404 SIP accounts, 4 lines Dual-switched 10/100/1000 Mbps ports, integrated PoE 5-way audio conferencing Integrated Bluetooth ® Compatible with GXP2200 Extension Module See also different: ATAs & Gateways – HT812 v2 – HT814 v2 HT818 v2 Business Conferencing – GAC2570 Extension Modules – GBX20 Unified Communications – GRP2614