A. 10
B. 32
C. 64
D. 84
E. 96
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A. line timing
B. loop timing
C. internal timing
D. through timing
E. external timing
最新試題
Click the Exhibit button. Which type of multiplexer is shown in the exhibit？（）
In the OSNR model for EDFA amplifiers， SNR OUT = 1/（1/SNR IN + FhvB/P IN ）， what does SNR IN represent？（）
On an ONS 15454 node you can tunnel a（n） （）.
SDH Code Violations （CVs） totals in the PM tables are actually an accumulation of the number of（）.
Click the Exhibit button. What is the maximum allowable loss budget between the ONS 15216 Mux （left side） composite output and the ONS 15216 Demux （right side） composite input， with the optical values given in the exhibit？ （Assume the worst case loss of 4.5 dB for 15216 200 GHz Mux/Demux and ignore power penalties or extra margin.） （）
Click the Exhibit button. The exhibit shows a 15454/15216 DWDM system and alarm indications. What are two possible sources of trouble shown in the system？（）
Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems？（）
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？ （）
What is the difference between the transmitted power and the sensitivity of the receiver？ （）
Which device creates an OEO conversion？ （）