clapgeek logo
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.
The device IP address of the gateway element and the non-gateway element must be set in the same network segment.
In the system control unit, which of the following databases does not lose data after a power failure? (Multiple choice).
Optical monitoring channel is used for monitoring of WDM optical transmission systems. In the UU-T recommendation, it is preferable to use a 1510 nm wavelength of the a ") rate.
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.
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 logical function modules is used to generate exhaust R-LOS alerts?
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.
After the U2000 sends configuration data to the network element, if the SCC single board authentication fails, the network element enters the installation state.
In the OSN550, the CXL slot contains a function board that integrates a system control and communication (SCC) unit, a cross-connecting unit, and a clock unit Depending on the functionality and access features provided by the OSN550, there are several types of dashboards
When using a script to back up and restore network configuration data for the U2000, you can change the directory where the export file is saved.
Which of the following is the frame indicated by the VC-4 J1 byte by the AU pointer of the current frame?
The working and protection ports of a linear MSP group must be on the same board.
Which of the following is the difference between an AU pointer and a TU pointer? (Multiple choice).
Which of the following clock operating modes supports the ITU-T G.781 standard? (Multiple choice).
When the bridge uses IVL learning mode, an entry in the MAC address table is created based on the source MAC address and source port of the teach frame. This entry applies to all VLANs
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 an OTU board works with an OLP board, the optical power difference cannot be used as a trigger condition for intra-board 1+1 protection switching.
When the working PQ1 board is oversized, the device will perform and the TFS protection will be reversed. Which of the following statements about the switching process are correct? (Multiple choice).
When configuring LMSP, there are two switching modes: single-ended switching and double-ended switching. Single-ended switching does not require the protection protocol to be enabled.
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 AAC address consists of 46 bits and is globally unique
Which of the following - is the meaning of the eighth-digit MAC address with 1?
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 bytes can be used for ordenwire calls between two REG devices?
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.
SES: There are 5% or more of the False blocks or at least one defect (OCI/AIS/LCK/IAE/LTC/TIM/PLM) in one second.
On OSN Series transmission devices, ethernet ports cannot access tagged and untagged frames at the same time
Which of the following are the components of the WDM system summer with N glass lengths? (Multiple choice).
SDH is a complete standard digital signal hierarchy that provides____, multiplexing, and cross-connection. (Enter only lowercase letters.)
According to the formula "ODUk rate = 239/(239k) x STM-N frame rate", ODU4 The rate is equal to the 239/235xSTM-N Pa rate.
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 is the basic requirement of the DWDM system in the light source?
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 is the functional unit that provides serial data for the interface and system associated with the orderwire phone?
The working mode of the port determines the flow control mode of the port.
When the operating mode is 100Mbit/s full duplex, one of the following flow control modes can be used
In WDM systems, it is ideal to use a dielectric thin film filter (TFF) when using less than () wavelengths.
For osn3500, which of the following boards provides centralized backup capability for the +3.3V power supply of each board in the sub-shelf?
Which of the following communication protocols are used for DCN management of Huawei devices? (Multiple choice).
According to the formula "OTUk rate = 255/(239 - k) x STM-N frame rate", the OTU3 signal rate is 255/236 x STM-N frame rate.
PDM uses a polarization beam splitter to divide the laser into two vertical directions: x and y.
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).
Which of the following maintenance signals is transmitted from the downstream site to the upstream site of the OTN?
Which of the following technologies is the main difference between an open DWDM system and an integrated DWDM system?
Which of the following is affected by changing the element ID of OSN3500 on 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.
In MSP networking, when the optical fiber is connected between sites, the east light plate of the site is connected to the west light plate of the downstream site, and these stations are connected in turn to form a ring. In this case, the direction from the toko plate of the site to the wine light plate of the downstream station is the direction of the main ring, and the direction of forming the ring is the direction of service.
Which of the following logic function blocks are involved in processing clock signals? (Multiple choice).
In the frame structure of the SDH signal, there are large overhead bytes for operation, management, and maintenance (OAM). Overhead bytes account for all bits () of the entire frame and greatly enhance the monitoring capabilities of the network.
Which of the following bytes in the regenerator part overhead are associated with R-OOF and R-LOF? (Multiple Choices)
When performing fiber cut-off test on an ordinary MSP ring, which of the following alarms will be reported? (Multiple choice).
SDH signals must be scrambled before they can be transmitted over optical fibers. Which of the following bytes is not scrambled? (Multiple choice).
In WDM systems, it is ideal to use a dielectric thin problem filter (TFF) when using less than () wavelengths.
Which of the following local maintenance endpoints can be used to manage MSTP devices?
TESTED 15 Sep 2025
