Which of the following descriptions about bit errors in the SDH network is wrong?

Question

VerÃ³nica Crespo · Accepted Answer

B1, B2, B3 can only detect the even number of errors in a block, and the odd number of errors cannot be detected

VerÃ³nica Crespo · Answer

B1, B2, B3 can only detect the odd number of errors in a block, and the even number of errors cannot be detected

VerÃ³nica Crespo · Answer

Through B1, B2, B3, the bit errors of the regeneration section, multiplex section and high-order channel can be detected respectively

VerÃ³nica Crespo · Answer

Bit error means that after receiving, judging, and regenerating, some bits in the digital code stream have errors.

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