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The essence of QPSK modulation is to select 4 possible values on the optical field phase, so that the baud rate can be reduced by half without reducing the line rate.
The essence of QPSK modulation is to select 4 possible values on the optical field phase, so that the baud rate can be reduced by half without reducing the line rate.A . True B. FalseView AnswerAnswer: A
The OSC monitoring wavelength is 1510nm, the rate is 2Mb/s, and the receiving sensitivity can reach -48dBm.
The OSC monitoring wavelength is 1510nm, the rate is 2Mb/s, and the receiving sensitivity can reach -48dBm.A . True B. FalseView AnswerAnswer: A
Ring multiplex section protection utilizes K1 and K2 bytes to transmit switching requests to realize automatic protection.
Ring multiplex section protection utilizes K1 and K2 bytes to transmit switching requests to realize automatic protection.A . True B. FalseView AnswerAnswer: A
The gain of the OAU single board is 23db, and 1% of the total output power of the OAU single board is used for MON detection. Now the output optical power of the MON port is tested to be - 8dbm, and the input optical power of the IN port of the OAU single board is?
The gain of the OAU single board is 23db, and 1% of the total output power of the OAU single board is used for MON detection. Now the output optical power of the MON port is tested to be - 8dbm, and the input optical power of the IN port...
When using the dual slot line group MSP ring, which of the following situations is the multiplex section overhead K bytes in the pass-through state?
When using the dual slot line group MSP ring, which of the following situations is the multiplex section overhead K bytes in the pass-through state?A . The cross board is abnormal B. The main control board is abnormal C. The main control board is not in place D. When the...
When congestion occurs, queuing strategies can be varied. If you need to get services for the first arriving packets, you can use the () queuing strategy; if you want to ensure that the most urgent and critical business is served first, you can use the () queuing strategy: if you need to balance the delay and delay jitter of each flow, you can choose () queuing strategy; if you want to provide professional bandwidth for specific services, you can choose () queuing strategy.
When congestion occurs, queuing strategies can be varied. If you need to get services for the first arriving packets, you can use the () queuing strategy; if you want to ensure that the most urgent and critical business is served first, you can use the () queuing strategy: if you...
The instrument test method is generally used to eliminate external problems of transmission equipment and docking problems with other equipment.
The instrument test method is generally used to eliminate external problems of transmission equipment and docking problems with other equipment.A . True B. FalseView AnswerAnswer: A
How many VC12 virtual TE links are supported by the same physical board or between two adjacent network elements?
How many VC12 virtual TE links are supported by the same physical board or between two adjacent network elements?A . 1 B.4 C.8 D.2View AnswerAnswer: B
If only all network elements in a certain subnet are out of management on the network management system, and network elements belonging to other subnets communicate normally, which of the following reasons is impossible?
If only all network elements in a certain subnet are out of management on the network management system, and network elements belonging to other subnets communicate normally, which of the following reasons is impossible?A . Changing the IP address of the gateway NE by mistake B. NMS network management failure...
Which of the following is the performance related to SM segment error?
Which of the following is the performance related to SM segment error?A . OTUk_BBE B. OTUk_SM_FEBBE C. OTUk_SM_FEES D. OTUk_PM_BBEView AnswerAnswer: A
