Which of the following statements about optical multiplexer and demultiplexer boards is false?
ATNG2D6001 demultiplexes one multiplexed-wavelength signal into a maximum of 60 even-wavelength optical signals.
BTNG2M60V is a 60-channel multiplexer board with VOA (Super C band).
CTNG2UM40 is a 40-channel multiplexer board (Super C band).
DThe UITL board multiplexes and demultiplexes signals with 50 GHz spacing and signals with 100 GHz spacing.
What is the networking mode of a parallel FOADM site?
AEX40+EX40
BEX40+ EMR8
CMR4+MR4
DEMR8+EMR8 -
If a DCM is configured in a system, the input single-wavelength optical power of the DCM must be lower than or equal to ( ) dBm.
A-4
B-2
C-1
D-3
During CV/FFD, the ingress node transmits detection packets at a specific interval, and the egress node checks the number and content of these packets at an interval ( ) times the length of the detection packet transmission interval.
A10
B5
C15
D3
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In MPLS OAM and MPLS-TP OAM, which of the following packets support alarm suppression? (Choose all that apply.)
ACC
BAIS
CFDI
DBDI
When the TTI to be received at the PM layer is inconsistent with the TTI actually received at the PM layer, which of the following alarms will not be reported?
AODUk_PM_LOF
BODUk_PM_TTI
CODUk_PM_TIM
DODUk_PM_LOS
When a member port is added to or deleted from a static LAG, LACP must be started.
ATRUE
BFALSE
OOS overheads are optical-layer overheads. Which of the following statements about OOS overheads is false?
AThey include OCh overheads.
BThey include OTS overheads.
CThey include OTN overheads.
DThey include OMS overheads.
After GE services enter the client side of an OUT board that supports Ethernet services, they are encapsulated into OTN or SDH signals by the signal processing module. The alarm signals are processed in the same way between encapsulation into OTN signals and encapsulation into SDH signals.
ATRUE
BFALSE
In the OTUk frame structure, which of the following alarms are related to section monitoring? (Choose all that apply.)
AOTUk_BDI
BOTUk_SM_DEG
COTUk_DEG
DOTUk_SM_BDI
Gain is an important counter of an OA, expressed in dB.
ATRUE
BFALSE
When LCK is inserted at the local ODUk PM overhead, how does the downstream site process the insertion?
AInserts the ODUk_PM_LCK alarm back to the upstream site.
BInserts the ODUk_PM_BDI alarm back to the upstream site.
CContinues to transparently transmit the ODUk_PM_LCK alarm to the downstream site.
DReports the ODUk_PM_LCK alarm.
When the R_LOS, R_LOF, R_OOF, or MUT_LOS alarm is reported on a device, services are interrupted.
ATRUE
BFALSE
In troubleshooting scenarios, misoperations may interrupt services. Which of the following is not a possible cause?
AAutomatic alarm reporting is disabled.
BThe transmit and receive FEC modes do not match.
CThe AIS maintenance signal is enabled.
DChannel protection is configured incorrectly.
You should analyze higher-severity alarms such as critical alarms first, and then lower-severity alarms such as major alarms.
ATRUE
BFALSE
OTUk_DEG indicates OTUk signal degradation. Which of the following statements about the bit error detection mode are true? (Choose all that apply.)
AWhen bit errors are detected in burst mode, this alarm is reported after signal degradation occurs.
BWhen bit errors are detected in Poisson mode, this alarm is reported after signal degradation or bit error threshold crossing occurs.
CWhen bit errors are detected in Poisson mode, this alarm is reported after signal degradation occurs.
DWhen bit errors are detected in burst mode, this alarm is reported after signal degradation or bit error threshold crossing occurs.
When configuring 1+1 optical line protection, you can select RI1/TO1 or RI2/TO2 as the working channel based on our given context.
ATRUE
BFALSE
Which of the following are ODUk overheads? (Choose all that apply.)
APM
BTCM
CAPS/PCC
DNJO
OTUCn and ODUCn implement the functions of the digital section and channel layer.
ATRUE
BFALSE
Which of the following tools are commonly used in WDM network commissioning? (Choose all that apply.)
AScrewdriver
BMultimeter
COptical power meter
DOptical spectrum analyzer
When the local end detects an OTUk_DEG alarm, which of the following statements about alarm handling at the upstream site is true?
AThe upstream site reports the OTUk_BEI alarm.
BThe upstream site reports the OTUk_BDI alarm.
CThe upstream site reports the OTUk_SSF alarm
DThe upstream site reports the ODUk_PM_SSF alarm
Which of the following operations must be performed before you query bit errors and optical power on the NMS? (Choose all that apply.)
ACreating logical fibers
BSynchronizing NE data
CSetting the Enable NE Performance Monitor Time parameter
DConfiguring data
TDM PWE3 is also called the CES service carried by PWE3. It supports SAToP and CESoPSN modes. Which of the following statements about the two emulation modes is false?
AIn SAToP mode, the frame structure of TDM signals does not need to be identified, and the TDM signals are processed as serial data bit streams, divided into TDM bit streams by integer multiple of the E1 frame length, and then encapsulated into PWE3 packets for transmission.
BIn SAToP mode, overheads and payloads in TDM signals are transparently transmitted, and alarms can be transparently transmitted.
CThe control word of SAToP packets is optional.
DThe number of E1 frames that are encapsulated in a CESoPSN packet is determined by the value of “Packet Loading Time”. The period of a TDM frame is 125 us. As a result, if the value of “Packet Loading Time” is 1 ms, each PW packet will load eight TDM frames.
A multiframe alignment signal is used for multiframe alignment. When some OTUk and ODUk overhead signals need to be transmitted across multiple frames, the MFAS must be used to implement multi-frame alignment.