Hello, it seems your ONT port only supports FE, the ONT HG8240 already EOM in 2014, you can confirm with your provider, and ask them to sale one new ONT to you, many ONT types of Huawei can support GE port, you can confirm with your provider which type and version has been tested in their network. (ONT version should compatible with the ISP OLT version and OSS system )