Which of the following is the main advantage of SDH? (Multiple choice).
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 is the functional unit that provides a high-speed signal interface and processes the corresponding signal?
For OSN3500, there is a slot mapping relationship between the processing board and the interface pre-processor. The processing board in slot 1 maps to the interface board in slots 19-20.
Which of the following statements about ODUk_PM_BDI is correct?
Which of the following is the maximum number of OSN3500 sub-racks that can be installed in a 2.2-meter cabinet?
The backplane has two 48V power cords, and each board gets two -48V power supplies from the backplane. After combining the power supply via diodes, the various voltages required for each component are obtained by means of a DC/DC power module and a linear mane swap.
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.
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.
RSOH, MSOH, HPOH and LPOH implement the monitoring function in descending order of the monitoring fan country.
The following is the frame structure of the STM-16?
Which of the following bytes can be used for wired phones between two REG devices?
Which of the following device domains can be managed by U2000? (Multiple choice).
Which of the following clock operating modes supports the ITU-T G.781 standard? (Multiple choice).
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?
On a Layer 2 switching device, if the Ethernet port is an Access port, the port can only receive Ethernet frames without a VLAN tag or Ethernet frames with the same VLAN ID as the default VLAN ID of the port.
Which of the following is the VLAN classification method? (Multiple choice).
Which of the following bridges are used to forward data based on the MAC address and VLAN ID carried in the data?
Which of the following layers define the protocols that control the network layer? The protocol for this layer applies to logical links, i.e. end-to-end connectivity between two devices.
Which of the following are the service board types for MSTP devices? (Multiple choice).
Which of the following is the frame indicated by the VC-4 J1 byte by the AU pointer of the current frame?
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.
In the case of SNCP, the board selectively receives the service. Therefore, SNCP can protect services on the line.
Which of the following statements about basic LCAS functionality are correct? (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
MSP is a network-level protection scheme. MSF does not directly protect services, and MSP switching and recovery are not affected even if there is no service on the MSP ring.
Which of the following statements about overhead bytes is incorrect?
The scope of management of OMSn is the path from the input optical port on the multiplexer unit of the sending site to the output optical port on the multiplexer unit of the receiving site, called the optical multiplexing segment (OMS) path.
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.
According to the formula "ODUk rate = 239/(239k) x STMN frame rate", ODU4 The rate is equal to 239/235× STMN frame rate.
Which of the following statements about the advantages of OTN are incorrect?
Which of the following is the difference between an AU pointer and a TU pointer? (Multiple choice).
Which of the following statements regarding multiplexing partial remote False indication (MS-REI) is correct?
(1) B2 bytes indicate the transmission channel.
(2) The M1 byte represents the transmission channel
(3) THE MS-REl is sent from the receiver to the source.
(4) MS-REI is transmitted from the source to the receiver.
(5) Indicates the number of bit Falses detected by the receiver after receiving the MS signal.
Which of the following are the components of the WDM system summer with N glass lengths? (Multiple choice).
Which of the following statements about the EFS4 board are correct? (Multiple choice).
PDM uses a polarization beam splitter to divide the laser into two vertical directions: x and y.
Which of the following bytes in the regenerator part overhead are associated with R-OOF and R-LOF? (Multiple Choices)
When configuring the SXCS single board for the OSN3500, which of the following is the access package of the fully configured substand?
The receiver performs a BIP-8 check on unscrambled STM-16 frames. If the BIP8 check result XOR·∶, the value of the B1 byte contained in the next STM16 ring is 10001100, which indicates STM-16 There is a () bit False block in the axis.
Which of the following communication protocols are used for DCN management of Huawei devices? (Multiple choice).
Which of the following alerts does not trigger an AU-AIS alert?
Which of the following logic function blocks are involved in processing clock signals? (Multiple choice).
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.
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.
Which of the following is the functional unit that provides serial data for the interface and system associated with the orderwire phone?
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.
In WDM systems, it is ideal to use a dielectric thin problem filter (TFF) when using less than () wavelengths.
When setting up LCAS mode, follow these principles:
1. If both ends of the device are Huawei devices, please set it to "Standard Mode".
2. If a Huawei device is interconnected with a third-party device, set the interconnect device to the same mode according to the mode supported by the third-party device.
Which of the following different types of ESC are divided according to the principles of implementation? (Multiple choice)
Which of the following alerts does not trigger an AU-AIS alert?
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.
The last 256 columns in the OTN frame structure are the FEC regions for forward False correction.
Which of the following maintenance signals is transmitted from the downstream site to the upstream site of the OTN?
Bait-doped fiber amplifiers (EDFAs) are a key component of the new generation of optical communication systems. Which of the following is the feature of EDFA? Multiple Choice) □
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
When the ACT indicator of the SDH board is off, it means that the board has a hardware failure and cannot be used.
Manual configuration will clear the data on the NE side
Which of the following is not a nonlinear effect?
Which of the following is the electrical layer cost of OTN? (Multiple choice).