Unified Communications – GRP2615 Product Description GRP26155 SIP accounts, 10 lines Integrated dual-band Wi-Fi 802.11ac (2.4Ghz & 5Ghz) Includes built-in PoE Swappable faceplates Compatible with GBX20 Extension Module See also different: Intercoms & PA – GSC3510 Wi-Fi Cordless IP Phones – WP826 GXP Series IP Phones – GXP2135 Unified Communications – GRP2610(P)