Which of the following statements about overhead bytes is wrong?

Question

Options

• AA1 and A2 are framing bytes. These bytes are used to separate STM-1 frames in the signal
• BJO is the regenerator section tracking byte. This byte is used to repeatedly transmit the segment
• CB1 is Bit Interleaved Parity-8 (BIP-8). This byte is used to monitor bit errors in the regenerator
• DE1 and E2 are wire bytes. These bytes are used to provide a voice channel for order line

• A
  84% (58)
• B
  6% (4)
• C
  9% (6)
• D
  1% (1)

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