. What It Does Tenda Po E30G-AT is IEEE802.3at Gigabit Po E Injector fully complies wtih 802.3at standard it delivers power by Ethernet cable up to a maximum transfer distance of 100 meters. The Po E Injector features over two Ethernet Gigabit data port & a output port combined data & power. Also the device is suitable for use with IEEE802.3af/at-compliant Po E power application for Ethernet device such as wireless AP Vo IP phone & web cam. Po E30G-AT supplies power by Ethernet cable not only providing system reliability traditional electric network extension but simplifying electric wires deployment..