A. 10
B. 32
C. 64
D. 84
E. 96
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你可能感興趣的試題
A. line timing
B. loop timing
C. internal timing
D. through timing
E. external timing
最新試題
If the dispersion of a given fiber is 17ps/nm*km at 1550 nm and zero at 1310 nm， then what is the accumulated dispersion of an ITU wavelength after it travels 200 km？ （）
Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems？（）
The dispersion of a non-zero dispersion shifted fiber is 6 ps/nm*km at 1550 nm and 10 ps/nm*km at 1610 nm. What is the minimum dispersion compensation required if an L-Band DWDM signal travels through 200 km of fiber and has a dispersion tolerance of 1800 ps/nm？（）
What are two important considerations when using 2- or 4-channel 15216 OADMs？（）
Which timing mode is appropriate for an SDH NE that is adjacent to an SDH NE Bits-1 timing？ （）
Which device creates an OEO conversion？ （）
If node 2 is accepting line timing from node 1， node 2 will send （） to node 1 as its SSM messge.
In order to avoid misconnections due to a failed node in an MS-SPRing， Alarm Indication Signals （AISs） are sent on every channel normally terminating in that node. What is the name of this process？（）
What is an advantage of an externally modulated laser over a directly modulated laser？ （）
What are two major differences between MS-SPRing and SNCP？（）