Hi @D-C , I have tried to use SM331T today and its work! Thanks for your support. At first I just worried that the original SFP (Finisar) mentioned in datasheet that it is bidirectional data links....

Hi, I need to know that does the TP-SM331T support the bi-directional data links? also, If previously it used FINISAR FCLF8521P2BTL, does the TP-SM331T able to use for FINISAR?