The vSOL HG3221D-4G1S is a dual-mode GPON/EPON ONU HGU that combines flexibility and high performance for fiber optic broadband access. Designed for home and small office users, this unit works with both GPON and EPON infrastructures, seamlessly integrating into different network architectures of service providers. The device offers a comprehensive connectivity solution with 4 Gigabit Ethernet LAN ports, 1 Gigabit WAN port, and 1 POTS voice port, while the USB 3.0 port allows network storage or printer sharing. Its technical strength lies in dual-band WiFi 5 (802.11ac) support, delivering 300 Mbps on the 2.4 GHz band and 866 Mbps on the 5 GHz band, for a total wireless capacity of up to 1.2 Gbps. Powered by an MTK chipset, it fully supports both IPv4 and IPv6 protocols, ensuring stable and uninterrupted connectivity even for bandwidth-intensive tasks like 4K/8K video streaming, online gaming, and heavy downloads. In terms of use cases, the HG3221D-4G1S is ideal for smart homes, apartments, and small businesses with fiber optic infrastructure. It can be used as an endpoint in Passive Optical LAN (POL) solutions or connected directly to an OLT to function as an independent fiber modem and wireless router. With built-in VoIP support, it also carries traditional telephone lines over the fiber network, consolidating all communication needs into a single device. Technical Specifications: - Product Type: GPON/EPON ONU HGU - WiFi Standard: WiFi 5 (802.11ac) - WiFi Speed: 1.2 Gbps (5 GHz: 866 Mbps, 2.4 GHz: 300 Mbps) - LAN Ports: 4 x Gigabit Ethernet - WAN Port: 1 x Gigabit Ethernet - POTS Port: 1 - USB Port: 1 x USB 3.0 - Power Input: 12V DC - IP Support: IPv4/IPv6 - Dual Band: Yes (2.4 GHz and 5 GHz)