Older firmware often blocks bridge mode (disabling NAT so you can use a personal router). Newer builds or modded firmware reveal the "WAN Bridge" menu under Network → Interface .
is a versatile XPON Optical Network Terminal (ONT) used primarily in Fiber-to-the-Home (FTTH) deployments. Managing its firmware is essential for maintaining high-speed connectivity (up to 2.5Gbps downlink) and ensuring compatibility between GPON and EPON networks. www.ycict.net GM220-S Firmware Overview Most GM220-S units ship with English firmware , often featuring the Firmware Gm220-s
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