A.False

B.True

A.False

B.True

A.J0 is the regenerator part trace byte. This byte is used to resynch the send segment access point identifier so that the receiving end can verify its continuous connection to the specified sender.

B.E1 and E2 are wired bytes. These bytes are used to provide a voice channel for order line connections.

C.B1 is better than holding interleaved parity 8 (BIP-8). This byte is used to monitor for bit errors in the regenerator section layer.

D.A1 and A2 are framed bytes" These bytes are used to separate STM-1 frames in the signal stream. .

A.False

B.True

A.Flexible mapping and synchronization multiplexing

B.flexible mapping and asynchronous multiplexing

C.Asynchronous multiplexing

D.flexible mapping