Before querying the error and optical power on the network management, you need to perform the () operation. Otherwise, you cannot query the corresponding teaching data.
In WDM systems, when using less than () wavelength, it is ideal to use a dielectric thin film filter (TFF).
The following description of the 1+1 protection in the board, the correct ones are: (Multiple Choice)
In a typical chained NG WDM network (such as A -> B -> C, A, B, and C are three sites), it is found that the official telephone number between the stations is not available during the commissioning. What are the possible reasons? (Multiple choice)
FOADM includes parallel FOAD and serial FOADM, both supporting 40 waves or 80 waves of arbitrary wavelengths.
Which of the following tools may Board replacement use? (Multiple choice)
Which of the following factors determine the optical signal-to-noise ratio (OSNR) of the receiving end to a certain extent? After a certain distance of signal transmission in the WDM system, the optical signal-to-noise ratio (OSNR) of the receiving end decreases to a certain extent. Which of the following is the main reason?
Customer Example 1+1 protect when using different routes, the same wavelength cannot be used for the working wavelength and the guard wavelength.
The following description of discrete services, which are correct? (Multiple choice)
Which of the following is a good way to avoid creating discrete paths? (Multiple Choice)