H31-341_V2.5 Exam Questions

If the cumulative amount of dispersion exceeds the system's dispersion tolerance, it will cause bit errors at the receiving end.

When R_LOS, RLOF, R_OOF, MUT_LOS and other alarms appear on the device, it means that the service has been interrupted.

Flex grid technology can flexibly adjust the center frequency of the liquid length by adjusting the occupied slice position.

The receiving sensitivity of a certain optical monitoring board is -48dBm. When the input optical power is -5dBm, it meets the requirements of the optical power receiving range.

If there is only a single channel interval, automatically plan the allocation from short wavelength to long wavelength according to the default channel.

The MOTUm interface completes the ODUPM overhead encapsulation before the ODUK-TCM encapsulation in the sending sea?

Only one TCM can be used at the same site

The setting of alarm reversal is port-based.

The CLASS 1M mark on the optical module indicates that the luminous power is low and will not cause damage to eyes or skin.

The use of QPSK modulation can reduce OSNR requirements and fiber nonlinear hazards, improve dispersion tolerance PMD tolerance, etc.

The EMR8 board is a fixed multiplexer/demultiplexer board, which can support up to 8 specific discontinuous wavelengths.

PWE3, as an end-to-end one-layer service bearing technology, provides a point-to-point L2vP service in the public network, and transmits various services (such as Ethernet and TDM...

In the early stage of the project, the commissioning of the coherent system can properly improve the performance by increasing the transmitted optical power.

For a coherent system, the reference point of the fiber-in optical power in the non-standard fiber- in scenario is the output port of the optical amplifier board at the sending end...

In the G.652 optical fiber and LEAF optical fiber system, the coherent mixed transmission of super 100G and 100G needs to set up an isolation zone.

For the OTN interface without optical layer overhead, in order to achieve the purpose of monitoring, the OTUk/OTUk-v/OTUkV and OTUCn signals are terminated when the interface signa...

In the scenario where the OTU processes Ethernet service signals, when the client side of the OTU boards at station A and station B are both in non-auto-negotiation mode, the clien...

In the non-converged OTU processing SDH standard signal scenario, both A and B are WDM sites. The client side of the OTU at station A detects an RLOS alarm. The client side of the...

TM20 single board can implement 20 coherent optical signals with different wavelengths to be added and multiplexed into 1 multiplexed optical signal and 1 multiplexed optical signa...

For a system with an optical amplifier, the lower threshold of the received optical power on the wavelength division side of the OTU board (PIN type receiving laser) is the receivi...

The nominal rate of the OTU4 signal is 111 809 973.568 kbit/s, and we generally think that the line rate is about 112G.

The dual-fiber bidirectional wavelength division multiplexing system uses two optical fibers to realize bidirectional optical signal transmission, and the same wavelength cannot be...

The 5A deployment of OptiXtrans DC908 refers to port self-adaptation, fiber self-discovery, fiber self-discovery, wavelength self-configuration, and optical layer self-commissionin...

RDU9 can realize the dynamic and configurable demultiplexing function from any wavelength to any port.

The overall procedure for commissioning optical power of a system without an optical amplifier: adjust in sequence from upstream to downstream according to the flow direction of th...

For the hybrid transmission system with dispersion compensation, the requirements for the optical power entering the fiber should be consistent with the requirements of the origina...

The core device of ROADM is the wavelength selective switch (WSS)

The DH function can be used to count the delay and jitter of service packets

Both OTUCn and ODUCn can complete the functions of digital field and channel layer.

When a 80 wave ROADM site uses a TM20 for multiplexing, an ITL board must be configured.

Optical fiber and LEAP optical fiber systems, 1006 and 106 mixed transmissions need to set up isolation bands, and only one-sided adjacency is supported, and double-sided adjacency...

The last 256 columns of the OTN frame structure are FEC areas, whose function is forward error correction.

In actual WDM systems, systems with a rate of 10G and below are greatly affected by polarization mode dispersion.

OptiXtrans DC908 can predict faults based on trends and volatility, predict all gradual faults in advance, and realize from passive operation and maintenance to active operation an...

In the Colorless scenario, use the M40V/D40 board for adding and adding waves.

DWSS20 single board can realize 20-dimensional optical signal scheduling

Gain is an important index of fiber amplifier, and its unit is decibel.

The frame structure of the OTUk signal consists of 4 rows and 4080 columns, and the value of k can be an integer of 0 to 6, representing line rates of 1.25G, 2.5G, 10G, 40G, 100G,...

The business path belongs to the network layer data on the network management side. Deleting the path at the network layer will not affect the business.

The fully standardized optical transport unit OTUK is an OTUk frame that fully complies with ITU- T G.709 recommendations, and it has the precise field format, field size and type...

In the process of configuring E-LAN, the MAC address learning mode can be set to SVL and IVL. SVL is independent VLAN learning, and IVL is shared VLAN learning.

Like STP equipment, NG WDM equipment can practice network element configuration on the network management system through pre-configuration.

Once a nonlinear effect occurs, its impact on service signals cannot be repaired. Therefore, the current network's approach to dealing with nonlinear effects is to avoid the occurr...

1+1 optical line protection single-end switching is faster than 1+1 optical line protection double- end switching.

The manual reset at the equipment site is hard reset.

In MRPS protection, when a fault occurs, the Raw label is swapped into a Rap label and switched to the protection channel.

1:3 cross-connection mode needs to add two CXCS cross-connection boards, resulting in fewer supported service slots than 1:1 cross-connection mode by two 11U large slots. Therefore...