... 2.Wavelength : 850nm/1310nm/1550nm 3.prompt delivery 4.good price ethernet optical modemSpecifications fiber modem, optical modem fiber converter, media converter PDH, fiber mux, fom, fiber multiplexer, optical ... Resistance:75Ω (non-equilibrium), 120Ω (balanced) Features of interface:Comply with G.703 and G.704 standards. Whipping feature:Comply ...