The necessity and importance of developing 10 Gbit/s O/E transponder module has been analyzed. The theory
features and performance parameters of 10 Gbit/s transponder have been introduced and explained. The experiment shows that our 40 km 300 pin MSA 10 Gbit/s transponder modules can implement free bit error transmission over 43 km G.652 SMF. Some parameters of the modules in Transmission have also been tested.