H31-341_V2.5 Exam Questions

Which of the following options are included in the advantages of WDM? (Multiple choice)

Which of the following boards can realize the broadcast function of service signals in the receiving direction? (Multiple choice)

For emergency treatment of service interruption, fault location should be carried out as soon as possible, and then the service should be resumed.

When performing a 10-minute error-free test on a wavelength division channel, the local end uses an SDH analyzer to connect to the client-side interface of the OTU board, and the o...

Since the CWDM system does not use optical amplifiers, the focus of the commissioning is whether the optical receiving of the OTU board is reasonable.

FOADM includes parallel FOADM and serial FOADM, both of which support 40 full waves or 80 waves of any wavelength.

When light passes through a passive optical device, it will cause a drop in optical power. This loss is called the insertion loss of the device.

Both ETH PWE3 and TDM PWE3 services support point-to-point and point-to-multipoint scenarios.

The basic principle of fault location is to accurately locate the fault to a single station or even a single board.

One SCC board and one PANEL board can be configured on the Optixtrans DC908 machine box, or it can be configured as 1+1 dual master control.

For an amplifier, the smaller its noise figure (NF) value, the less noise it introduces, and the longer distance it can transmit under the same conditions.

The minimum pipe granularity defined by the traditional OTN network is ODUO, which is 1.25G. If it is used to carry services with smaller granularity, the resource utilization rate...

The frame structure size of the OTUk frame is variable.

OTM-nr.m consists of multiplexing of up to n optical channels, r means reduced function (reduced), and does not support non-associated overhead.

It is known that the difference threshold of the main channel and the standby channel is 5dB initial optical power, and both the main channel and the standby channel are 2dBm. Due...

In the maintenance process, after reconfiguring a network element, special attention should be paid to setting the network element time of the network element to the current time,...

The decrease of signal-to-noise ratio at the receiving end will not cause bit errors.

The receiving overload point of the APD diode is 0dBm.

The alarm detection of the optical layer overhead is realized through the optical layer overhead OOS. Although the alarms such as R_LOS and MUT_Los are also optical layer alarms, t...

When the GE service is encapsulated into the OTN frame structure and the SDH frame structure, the alarms reported by the client-side device are different.

Equipment maintenance personnel can judge whether the equipment has ever failed by observing the indicator lights on site. But the disadvantage of this method is that the informati...

The Raman amplifier is a distributed amplifier, and its amplifying medium is a transmission fiber, which is generally placed at the receiving end and is called a forward Raman ampl...

Most of the WDM systems on the existing network adopt the single-fiber bidirectional transmission mode.

In the non-converged OTU processing OTN standard signal scenario, both A and B are WDM sites, and the client side of the OTU at station A receives the RLOS signal; after processing...

SES: 5% or more errored blocks or at least one defect in one second (OCI/AIS/LCKYAE/LTC/TIM/PLM).

AC is the WDM OTM site, and B is the relay site. When the optical fiber in the transmission direction from A to B is interrupted, the WDM side of the OTU relay board at B will repo...

After starting the extended SSM protocol, in addition to judging the clock quality level and priority, the clock ID will also be judged. After the network element receives the cloc...

When adjusting the optical power, the flatness is a very important index. The adjustment of the flatness is generally completed through the single-channel VOA in the multiplexer bo...

The NG WDM two-dimensional ROADM site can use the WSMD9 single board, and its signal flow is the optical signal connected to the main optical channel from the "IN" optical port. Th...

The signal flow analysis method first divides the whole network into several OMSs, judges the section of the fault, and then judges whether the direction of the fault is one-way or...

Generally, maintenance personnel are required to collect and save on-site data before troubleshooting.

The POWER_DIFF_OVER alarm reported by the OLP board will trigger optical line protection switching.

The FAN board of the OptiXtrans E6616/OptiX OSN 1800 V Pro device has four independent fans. When any fan fails, the system can operate normally for 96 hours at an ambient temperat...

When performing fiber synchronization, the network management has not created a fiber, indicating that the fiber connection only exists on the physical network element side.

Before creating an optical cross-connect, it is necessary to manually configure the corresponding port of the corresponding board as a boundary port, for example, the line-side por...

NG WDM adopts L0+L1+L2 three-layer structure. Among them, the L2 layer realizes the switching based on Ethernet/MPLS-TP, the L1 layer realizes the switching based on ODUk/VC, and t...

For 100G (112Gbit/s) signal, the actual data baud rate is only 28G baud.

The virtual concatenation group at one end of the two ends of the device has enabled LCAS, but the opposite end has not enabled LCAS. The local end reports an LCAS FOPR alarm.

FAS is the frame alignment overhead. The length is 6 bytes, located in the first row, column 1~6, and the first~3 bytes are 3 OA1 bytes. Each OA1 is always "11110110", which is F6...

The overhead ratio is a factor that affects the error correction capability of FEC technology. Generally, under the same FEC encoding/decoding algorithm conditions, the higher the...

The optical amplifier unit compensates for line loss and extends transmission distance. Connecting multiple optical amplifier units in cascade mode can extend the transmission dist...

A communication network is a system that interconnects geographically dispersed user terminal equipment to realize communication and information exchange. It is mainly composed of...

After the GE service enters the client side of the Ethernet OTU board, it is encapsulated into an OTN signal or an SDH signal by the signal processing module. The alarm signal proc...

The resources between single-board optical cross-connect configuration and single-site optical cross-connect configuration functions are mutually exclusive. Service scheduling of t...

Since the EALC/ALC function is used in the SOM system, the service may be interrupted during optical power adjustment.

The fixed cross-connect in this board does not need to be manually configured, and the U2000 automatically completes the configuration, such as the OTU board LSX.

In the same subnet, when configuring NNI port attributes, the IP addresses of the ports at both ends of different links can be repeated.

Before performing optical power commissioning on the ROADM board, configure virtual optical layer services; otherwise, the ROADM board blocks all wavelengths by default.

For non-returnable services, when the LSP is interrupted, the head node calculates an optimal path for service recovery, and then establishes a new LSP through signaling to transmi...

The SL64 board is available for the OSN2500.