H31-311 Online Practice Questions and Answers

When the transmit end detects that the b6-b8 of the K2 byte is 110, it indicates that the () alarm is reported at the transmit end.

A. MS-AIS

B. R-LOS

C. R-LOF

D. MS-RDI

OTM nr.m consists of a maximum of "n" optical multiplexing channels and does not support non-channelassociated overheads. The letter "r" indicates function reduction.

A. TRUE

B. FALSE

For an OSN 3500, which of the following boards provides the centralized backup function for the +3.3 V power supply of each board in the subrack?

A. PIU

B. AUX

C. COA

D. SCC

Which of the following effects is used by the Raman amplifier?

A. Self-phase modulation (SPM)

B. Dispersion

C. Raman scattering

D. Four-wave mixing (FWM)

Which of the following can be configured as the monitoring time of NE performance events?

A. Later than the current time

B. Same as the current time of the NE

C. Earlier than the current time

D. Any time

By default, the B2-EXC alarm is reported when the number of B2 bit errors exceeds the ( ) threshold.

A. 0.000000001

B. 0.00001

C. 0.001

D. 0.01

Which of the following are the device-level protection schemes of SDH products? (Multiple Choice)

A. Power supply protection

B. Cross-connect and timing board protection

C. System control board protection D. TPS protection

According to the formula of "ODUk rate = 239/(239-k) x STM-N frame rate", the ODU4 rate is equal to 239/235 x STM-N frame rate.

A. TRUE

B. FALSE

Which of the following are basic functions of the U2000? (Multiple Choice)

A. Security management

B. Topology management

C. Alarm management

D. Performance management

An arrayed waveguide grating (AWG) multiplexer/demultiplexer has the following advantages: short wavelength spacing, large number of channels, and flat passband. It suits DWDM systems with ultra-high speed and large capacity.

A. TRUE

B. FALSE