The AN5121 is a series of GPON FTTB type optical network units specially developed for the network access at outdoor environment, which has Power over Ethernet(PoE). The AN5121-4GP is especially designed for AP/IP camera backhaul scenarios, it can provide both data channel and DC power. The AN5121-4G provides a PON uplink interface and four auto-negotiated GE interfaces. It is a FTTB type GPON optical network unit that can access data services.