Practice Free H12-931_V2.0-ENU Exam Online Questions
#1 and #2 are OTM network elements, point-to-point chain service, 1 channel is opened, OAU of station A emits +4dbm, SC2 board receives -35dbm at station #2, OBU board receives -30dbm, and OTU board receives no light. Which is the most likely cause of the fault?
- A . The sending OTU board is faulty.
- B . The line loss between #1 and #2 is too large
- C . OTU board failure at site #2
- D . The optical protection board at site #2 is faulty
Loopback is a common operation for daily maintenance and troubleshooting. Which of the following statements about loopback operations are wrong? (Multiple choice)
- A . When performing hardware loopback operation on the optical port, you need to consider increasing the optical attenuation.
- B . After the inner loop is executed, the signal flows to the outside of this WDM network element
- C . Hardware loopback is to manually loop back the optical and electrical ports using pigtails and self-loop cables.
- D . After the external loop is executed, the signal is inside the WDM network element.
The resources between single-board optical cross-connection configuration and single-station optical cross-connection configuration functions are mutually exclusive. That is, after a user configures a single-board optical cross-connection of a certain wavelength on a WSS single board, the service scheduling of this wavelength on this single board cannot be configured through a single-station optical cross-connection.
- A . True
- B . False
In a 3-7-3 multiplexing route, one VC-12 can transmit () 2.048 Mbit/s signal.
When deleting discrete services, deactivate them first. If there are no PS, TU-AIS and other alarms, it means that it is a junk service. If there are alarms, it means that the analysis is wrong and it needs to be activated immediately.
- A . True
- B . False
Which of the following descriptions of ODUflex are correct? (Multiple choice)
- A . The advantage of ODUflex is that users can flexibly configure the capacity of the container according to the size of the business to achieve the most efficient use of railway bandwidth.
- B . ODUflex supports services from 1.25Gbit/s to 10Gbit/s
- C . ODUflex refers to ODUk technology with non-fixed bandwidth
- D . The bandwidth of each TS sub-time slot of ODUflex is 1.25Gbit/s
A certain wavelength division network, the networking is shown in the figure.
Now, due to the need for new services, two waves need to be added and dropped at site B, that is, the OLA site needs to be transformed into a back-to-back OTM site. Which of the following descriptions is wrong?
- A . To change the site type from OLA to back-to-back OTM, you need to add M40/D40/OA/OUT boards. You need to evaluate whether the existing network subrack slots are sufficient. If a new subrack is required, you need to evaluate whether there is space to install the new subrack.
- B . Since the original network dispersion is normally compensated, it is not necessary to consider adjusting the dispersion after the network transformation.
- C . It is necessary to recalculate the design signal-to-noise ratio of each segment AB, BE, and AE to evaluate whether the designed signal-to-noise ratio can meet the needs of business reception.
- D . Perform optical power budgeting for the new service relay segment and redesign the power of the transformed site according to the requirements of the back-to-back OTM site. If possible, add an optical amplifier board.
Instrument testing method is applicable to which of the following scenarios? (Multiple choice)
- A . Eliminate external problems with the transmission equipment
- B . Device connection issues
- C . Locating the faulty board
- D . Equipment performance indicator issues
Which of the following statements about network element package loading and diffusion upgrade is correct? (Multiple choice)
- A . Configure activation grouping. Gateway NEs and non-gateway NEs cannot be grouped in the same group.
- B . The number of network elements for the packet diffusion upgrade task shall not exceed 15.
- C . The package software upgrade task may not include the gateway network element
- D . A packet diffusion software upgrade can include at most one gateway NE, and all non-gateway NEs in the task must belong to the same gateway NE.
In the Colored & Directed scenario of 4D ROADM, how many sets of M40V+D40 are needed to dispatch local services to four directions?
- A . 2
- B . 1
- C . 4
- D . 9