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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.
output networks require higher costs than belt networks, but provide a more reliable management channel.
After a user adjusts service bandwidth, the NCE Controller delivers the new bandwidth to devices and adjusts the CIR and PIR of the service PW. During the adjustment, services are not interrupted.
When the sender detects that the b6-b8 of the K2 byte is 110, it means that the sender has reported an alarm ().
Which of the following device domains can be managed by U2000? (Multiple choice).
Which of the following bytes can be used for ordenwire calls between two REG devices?
In a WDM system, when the number of wavelengths is greater than ( ), the arrayed waveguide grating (AWG) is recommended.
In the case of a 1+1 linear MSP, which of the following switching modes does not require the APS protection protocol full (multiple choice) to be enabled
Which factors determine the optical signal-to-noise ratio (OSNR) of the receiving end to a certain extent After the signal transmission in the WOM system is transmitted over a certain distance, the "oSNR" of the receiving end of the optical signal-to-noise ratio is reduced to a certain extent. Which of the following is the main cause?
Which of the following are the components of a WDM system multiplexing N wavelengths?
The working and protection ports of a linear MSP group must be on the same board.
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
You can view the NE license status and replace the license that is about to expire in a timely manner to prevent the impact of license expiration on services.
Which of the following different types of ESC are divided according to the principles of implementation? (Multiple choice)
Which of the following is the frame indicated by the VC-4 J1 byte by the AU pointer of the current frame?
Which of the following can be used as the central wavelength of the pump source in EDFA? (Multiple choice).
Which of the following types of optical fibers has the zero-dispersion feature at 1310 nm?
According to ITU-T's recommendations, the requirement that the MSP switching time should be within 50ms is conditional. For example, the number of net elements on the entire ring network is less than 16.
Single-fiber bidirectional WDM systems use only one optical fiber to transmit optical signals in both directions at the same time. Light signals in both directions should be arranged at different wavelengths.
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.
PDM uses a polarization beam splitter to divide the laser into two vertical directions: x and y.
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.
The index is used to folio and delineate the starting position of VC-n in the corresponding AU or TU frame so that the receiving end can correctly remove the corresponding VC from the STM-N The VC and C packages are then separated into separate low-rate signals, such as PDH That is; Low-rate branch signals can be discarded directly from the STM-N signal
For osn3500, which of the following boards provides centralized backup capability for the +3.3V power supply of each board in the sub-shelf?
EPL services use bandwidth exclusively on the line, which is very safe. Dedicated line applications for VIP customers
Measure the False correction capability of fec with encoded gain. Which of the following statements about the coding gain is incorrect?
Frame-Mapped GFP (GFPF> is a processing mode that targets data encoding blocks such as Fibre Channel and ESCON.
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.
QinQ technology can be used when multiple users need to share the same VCTRUNK and use the same VLAN ID.
Some SNCP protection inversion conditions are default, such as AU-AIS and TU-AIS. Other conditions are optional, such as HP-TIM and HP-SLM. Optional conditions can be flexibly set according to the level of the costume.
Which of the following logical function modules is used to generate exhaust R-LOS alerts?
EPL services use ports and bandwidth exclusively, and different users may need to share resources. Which of the following methods can be used to isolate user data?
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
The nominal rate of OTU4 signals is 111,809,973.568 kbit/s. Generally, the line rate is 112 Gbit/s.
On OSN Series transmission devices, ethernet ports cannot access tagged and untagged frames at the same time
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?
PRBS can be used to test that the SDH service is healthy and that the protection reversal function is working.
Which of the following technologies is the main difference between an open DWDM system and an integrated DWDM system?
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
RSOH, MSOH, HPOH and LPOH implement the monitoring function in descending order of the monitoring fan country.
Which of the following are the components of the WDM system summer with N glass lengths? (Multiple choice).
When ODUk 5NCP is configured, common WDM services can be converted into SNCP services, but SNCP services cannot be converted into common WDM services.
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.
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.
OTM nr.m consists of up to n " multiplexed channels and does not support non-channel-related overhead. The letter "r" indicates a decrease in functionality.
The rate of SF64 and SL64 boards is STM54. Therefore, the two plates can be interconnected.
Forced switching, fiber switching, manual switching and motion switching are decreased in order of priority.
Which of the following bytes can be used for wired phones between two REG devices?
In the colored scenario, the TM20fTD20 board can be used to add/drop wavelengths.
During service configuration, which of the following service levels cannot be selected?
Linear MSP (LMSP) has two modes: 1+1 and 1:1. Additional services can only be configured for the protection channel in 1:1 mode of the LMSP.
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.
SDH signals must be scrambled before they can be transmitted over optical fibers. Which of the following bytes is not scrambled? (Multiple choice).
TESTED 06 Oct 2025