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The difference between dispersion compensation fibers and ordinary optical fibers is that the dispersion compensation fibers have a negative dispersion coefficient at ().
For (on-premises) HA solutions where active and standby servers are deployed in the same location, which of the following platforms can be deployed? (Multiple choice).
Self-healing refers to the capability of a network to automatically recover its services within a short period from a fault without any manual intervention. Users are unaware of the network fault. A network with this self-healing capability is a self-healing network.
Compared with dense wavelength division multiplexing (DWDM) systems, crude glass division multiplexing (CWDM) systems provide a certain amount of glass length and transmission distance within (kmkm), which greatly reduces system cost and has strong flexibility
When performing fiber cut-off test on an ordinary MSP ring, which of the following alarms will be reported? (Multiple choice).
The number of bit False blocks on each VC4 channel is detected by B3 on the receiving side. At the same time, the information is sent back to the sender via Q, and HP-REI and HP-FEBBE report on the sender.
The 1510nm optical monitoring channel can be effectively amplified after passing through EDFA.
The value of the MFAS byte increases with the sequence number of the OTUk/ODUK base frame and includes the most () base frames.
Which of the following is affected by changing the element ID of OSN3500 on NMS?
When configuring the SXCS single board for the OSN3500, which of the following is the access package of the fully configured substand?
Which of the following local maintenance endpoints can be used to manage MSTP devices?
There are 48 bits in MAC address. The first ( ) bits make up a unique identifier for the vendor and the last ( ) bits are allocated by the vendor
Which of the following statements about the MST functional module is correct? (Multiple choice).
In Recommendation ITU-T G.692, the allowable channel frequencies are based on the reference frequency (), and the channel spacing can be 100 GHz, 50 GHz or 25 GHz.
U2000 can flexibly interconnect with different third-party network administrators through the Northbound Interface (NBI) and provide physical inventory and alarm information for the upper-layer network management.
Which of the following alarm/event storage modes does U2000 support? (Multiple choice).
Array waveguide grating (AWG) multiplexer/multiplexer has the following advantages: short wavelength spacing, large number of channels and flat passband. Suitable for DWDM systems in ultra-high speed, large tubes.
The optical amplifier unit compensates for line losses and extends the transmission distance. Connecting multiple optical amplifier units in cascaded mode allows for extended transmission distances without following the system.
Optical module parameter "L-64.2" in "2" indicates which of the following working windows?
When a bit False is detected in B2 bytes, which of the following alarms is reported by the peer?
For the devices that support multiple transmission rates and working modes, the____mechanism can be used to determine the optimal communication mode between two connected
devices. (Enter only lowercase letters.)
According to the formula "ODUk rate = 239/(239k) x STMN frame rate", ODU4 The rate is equal to 239/235× STMN frame rate.
The clock unit can only access the external clock source as the timing signal source of the system through the external clock interface. In addition; It can also output a processed clock and provide a clock source for other devices that need timing.
Which of the following statements about the MSP ring is correct? (Multiple choice).
Which of the following is not a condition that triggers multiplexed segment protection (MSP)?
When the low-level resources of the device are insufficient, which of the following measures can be taken? (Multiple choice).
Which of the following is the meaning of "L" in the optical module parameter "L-64.2"
Which of the following statements about the sequence of a signal flow between the SDH interface and the cross-connect unit is true?
During service configuration, there are two time slot modes. Huawei uses interleaved time slot mode by default.
TU-AIS is often encountered during network maintenance. Which of the following alerts can trigger a TU-AIS alert? (Multiple choice).
When there is a Critical False In Seconds (SES) in the PM portion of the ODUk layer, which of the following alarms is reported by NMS?
The MAC loopback and PHY loopback are used for fault location. When the MAC loopback is set to in loop, the PHY loopback can be set according to the actual situation.
Suppose 2 VC-12 time slots need to be bound to the VCTRUNK1 of the N2EFS4 board. When there are 8 VC4 slots on the N2EFS4 board, which of the following slots meets the requirements?
When the U2000 is synchronized, the same network metadata as the U2000 is not uploaded to the U2000, and the data that exists on the U200 but does not exist on the network element is deleted.
Coherent receiver technology uses a local oscillator laser with the same frequency as the received signal to perform coherent processing and recover () information from the received signal. (Multi-quality selection.)
When the number of block errors detected by the B2 byte received at the recerve end is returned to the transmit end through the Ml byte, which of the following alarms or performance events are reported at the transmit end?
The working and protection ports of a linear MSP group must be on the same board.
Which of the following statements about the EFS4 board are correct? (Multiple choice).
Which of the following maintenance signals is transmitted from the downstream site to the upstream site of the OTN?
The STAT indicator of the SDH board flashes red, lights up for 100ms, and turns off for 100ms. Which of the following means the state of the metric?
In the system control unit, which of the following databases does not lose data after a power failure? (Multiple choice).
EPL services use bandwidth exclusively on the line, which is very safe. Dedicated line applications for VIP customers
The interval between two adjacent pointer alignment events is at least () frames.
Which of the following different types of ESC are divided according to the principles of implementation? (Multiple choice)
Hitless protection switching (HPS) provides the dual fed and selective receiving function for fiber differential protection services and aligns the end-to-end latencies of the working and protection paths, improving service reliability.
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.
In the SDH optical synchronous transmission system, which of the following bytes is used to transmit the quality and weight and usage information of the clock source?
D1 to D12 are digital communication channel bytes. D1 to D6 are used in the regenerator section, and D7 to D12 are used in the multiplex section.
WDM transmits optical signals multiplexed at multiple rates (wavelengths) through a single optical fiber, and the digital signals carried by these optical signals must have the same rate and data format
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 device IP address of the gateway element and the non-gateway element must be set in the same network segment.
When ODUk 5NCP is configured, common WDM services can be converted into SNCP services, but SNCP services cannot be converted into common WDM services.
In a WDM system, when the number of wavelengths is greater than ( ), the arrayed waveguide grating (AWG) is recommended.
Optical module parameter "L-64.2" in the "2" indicates which of the following working windows?
If a network port that supports autonegotiation is connected to a network port that does not support autonegotiation, you can interconnect in both half-duplex and full-duplex modes.
Which of the following are the components of a WDM system multiplexing N wavelengths?
RSOH, MSOH, HPOH and LPOH implement the monitoring function in descending order of the monitoring fan country.
TESTED 05 Oct 2025