show interface optical-module-info xgei_1/19/1
show pon power olt-tx epon-olt_1/4/4 //(C300)看PON口发光(PON口只发光) 一般2dbm以上
show pon power olt-rx epon-onu_1/6/2:1 //(C300) 看PON口下ONU的收光(ONU只收光) 一般-15dbm附近
show pon tx-power epon-olt_0/10/3 //(C220)看PON口发光(PON口只发光),不能太相信
show pon rx-power epon-onu_0/10/3:16 //(C200) 看PON口下ONU的收光(ONU只收光)