Which of the following statements about the reporting of OTUk_BDI alarm is wrong?

Which of the following statements about the reporting of OTUk_BDI alarm is wrong?
A . Only the WDM side port will report OTUk_BDI
B . The downstream station’s corresponding OTU board receives OTUk_AIS
C . The downstream station’s corresponding OTU board receives OTUk_TIM
D . The downstream station’s corresponding OTU board receives OTUk_SSF

Answer: A