25G SFP28 25G SFP28 SFP-25G-SR-S 25G SFP28 光模块 850nm 100m AO-25GB-SFP28-SR SFP-25G-LR-S 25G SFP28光模块 1310nm 10km AO-25GB-SFP28-LR SFP-25G-ER-S SFP28光模块 1310nm 40km AO-25GB-SFP28-ER 25G BiDi SFP28 单纤双向光模块 1330nm-TX/1270nm-RX 10-40km DOM AO-25GB-SFP28-BD 25G CWDM SFP28光模块 1270-1370nm 10-30km AO-25GB-SFP28-CM 25G DWDM SFP28光模块 100GHz 1563.86nm C17-C61 10-80km AO-25GB-SFP28-DM