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Question 10/77

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.

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Question List (77q)
Question 1: Which of the following are the components of the WDM system ...
Question 2: The refractive index n1 of the fiber core must be the Q of t...
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Question 12: What are the basic features of the U2000? Multiple Choices...
Question 13: The clock unit can only access the external clock source as ...
Question 14: According to the formula "ODUk rate = 239/(239k) x STM-N fra...
Question 15: The1310nm and 1550nm transmission windows are low loss windo...
Question 16: When there is a Critical Error In Seconds (SES) in the PM po...
Question 17: In WDM systems, it is ideal to use a dielectric thin problem...
Question 18: Which of the following logical function modules is used to g...
Question 19: When a bit error is detected in B2 bytes, which of the follo...
Question 20: Which of the following statements about signal label byte C2...
Question 21: QinQ technology can be used when multiple users need to shar...
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Question 23: Manual configuration will clear the data on the NE side...
Question 24: SDH signals must be scrambled before they can be transmitted...
Question 25: Some SNCP protection inversion conditions are default, such ...
Question 26: Which of the following statements regarding multiplexing par...
Question 27: Which overhead below 112 is not ODUk overhead?...
Question 28: Which of the following is the difference between an AU point...
Question 29: Which of the following statements about basic LCAS functiona...
Question 30: Which of the following can be configured as the monitoring t...
Question 31: The STAT indicator of the SDH board flashes red, lights up f...
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Question 33: When using a script to back up U2000 data, the backup speed ...
Question 34: On the NMS system, the network element performance monitorin...
Question 35: Which of the following ITLI-T recommendations define the OTN...
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Question 39: In the system control unit, which of the following databases...
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Question 41: The segment overhead of STM-4 is () bytes/frame....
Question 42: When the ACT indicator of the SDH board is off, it means tha...
Question 43: Compared with dense wavelength division multiplexing (DWDM) ...
Question 44: Which of the following light sources has the best dispersion...
Question 45: In the frame structure of the SDH signal, there are large ov...
Question 46: In the case of a 1+1 linear MSP, which of the following swit...
Question 47: Forced switching, fiber switching, manual switching and moti...
Question 48: Both PDH and SDH have globally harmonized standards....
Question 49: QinQ technology can be used when multiple users need to shar...
Question 50: TU-AIS is often encountered during network maintenance. Whic...
Question 51: EPL services use bandwidth exclusively on the line, which is...
Question 52: Coherent receiver technology uses a local oscillator laser w...
Question 53: For osn3500, which of the following boards provides centrali...
Question 54: Which of the following is the main advantage of SDH? (Multip...
Question 55: Which of the following are the service board types for MSTP ...
Question 56: Which of the following statements about the OTM-n .m and OTM...
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Question 59: Which of the following is the default WTR time for MSP switc...
Question 60: Which of the following local maintenance endpoints can be us...
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Question 62: PDM uses a polarization beam splitter to divide the laser in...
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Question 64: Which of the following statements about the MSP ring is corr...
Question 65: Which of the following is the multiplexing method of SDH?...
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Question 67: For alignment; Indicates the starting position of VC-n in th...
Question 68: Which of the following bytes can be used for ordenwire calls...
Question 69: In Recommendation ITU-T G.692, the allowable channel frequen...
Question 70: The rate of SF64 and SL64 boards is STM54. Therefore, the tw...
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Question 72: OSN1500/2500/3500/7500 supports DC and AC power inputs....
Question 73: The number of ODU2e signals multiplexed into the ODU3 signal...
Question 74: After configuring PDH on a per-net element basis, the full t...
Question 75: For 100G (112Gbit/s) signals, the actual data baud rate is o...
Question 76: The scope of management of OMSn is the path from the input o...
Question 77: Which of the following statements about the MST functional m...