Introduction Interfaces Specification The Radisys PM6165B XGS-PON Home Gateway Unit (HGU) is a Wi-Fi6 VoIP 1 FXS ports (RJ11) dual-band XGS-PON complying with the ITU-T G.9807.1 standard. The USB 2.0 Type A gateway is best suited for FTTH residential and small office use.