GPON Modem HUAWEI EchoLife HG8546M The ONT device is a GPON modem that, in addition to a number of RJ45 ports from the FXS port, is also equipped with a PON port and connects to the optical distribution network (ODN). In fact, ONT does the work of an FXS Voice gateway for you so you do not need a separate VoIP gateway device. Huawei ONT modem model EchoLife HG8546M with dimensions of 34 * 213 * 268 mm is one of the most practical network equipment and has a 4 Gigabit Ethernet port and 1 POTS port and is capable of supporting Wi-Fi wireless network and USB port. Number of network ports (LAN): four Number of USB 2.0 ports: one Number of USB 3.0 ports: None Frequency band: 2.4