Huawei H31-311_V2.5 - HCIA-Transmission V2.5
Which of the following statements about overhead bytes is incorrect?
Only one TCM can be used at one site
The refractive index n1 of the fiber core must be the Q of the cladding refractive Mo n2, which is a necessary condition for transmitting the optical signal in the optical fiber.
The backplane has two 48V power cords, and each board gets two -48V power supplies from the backplane. After combining the power supply via diodes, the various voltages required for each component are obtained by means of a DC/DC power module and a linear mane swap.
A light wave has two independent and orthogonally polarized modes on the plane perpendicular to the transmission direction, which are generally called X polarization and Y polarization respectively. Using this property of optical signals, the polarization multiplexing separately modulates optical signals on the two orthogonal polarizations.
NE A and NE B are adjacent NE
If B3 and low-order Falses occur in the A->B direction, and B1, B2, B3, and low-order Falses occur in the B->A direction, it is caused by Which of the following performance events does NEA report? (Multiple choice).
The last 256 columns in the OTN frame structure are the FEC regions for forward False correction.
Which of the following statements about the sequence of a signal flow between the SDH interface and the cross-connect unit is true?
Configuring the EPLAN service as a ring is not recommended. If the EPLAN service is configured as a ring network, the STP protocol must be enabled on the network to prevent broadcast storms.
Which of the following alerts does not trigger an AU-AIS alert?
