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
A 2.5 Gb/s （OC-48 or STM-16） optical signal with a dispersion tolerance of 1200 ps/nm goes through fiber with 18ps/nm*km of dispersion. How many 15216-DCU-350 equivalents are needed for enough compensation after traveling 100 km？（）
SDH Code Violations （CVs） totals in the PM tables are actually an accumulation of the number of（）.
A VC-4-4c consists of （）.
Click the Exhibit button. Which type of multiplexer is shown in the exhibit？（）
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？（）
Click the Exhibit button. Within an ONS 15454， you are provisioning a circuit on an unprotected SNCP ring. In the exhibit， which two must you configure？（）
What are two major differences between MS-SPRing and SNCP？（）
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？（）
On an ONS 15454 node you can tunnel a（n） （）.
What is the phenomenon called where different wavelengths of light travel at different speeds？（）