A.line timing
B.loop timing
C.internal timing
D.through timing
E.external timing
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A.2
B.3
C.4
D.20
E.22
F.24
A. VT circuits
B. STS circuits
C. VT tunnel circuits
D. 1:1 protection circuits
E. 1:N protection circuits
Click the Exhibit button. Given the information shown in the exhibit, when creating 2 DS1 circuits, how many STS ports are used on the VT1.5 matrix at Node 1 as VT circuits and how many are used after using VT tunnels?（）
A.2；0
B.3；2
C.3；5
D.4；0
E.6；0
F.6；2
A. Slot 2 and Slot 4
B. Slot 4 and Slot 6
C. Slots 5 or 13 only
D. Slot 16 and Slot 17
Click the Exhibit button. Which type of protection is shown in the exhibit?（）
A.1+0
B.1+1
C.1：1
D.1：N
最新試題
Scrambling of SONET signals is done to （）.
UPSR protection switching is initiated by （）, while BLSR is initiated by （）.
Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems? （）(Choose three.)
If node 2 is accepting line timing from node 1, node 2 will send （）to node 1 as its SSM message.
What are three factors that limit the maximum distance of an amplified optical signal without regeneration? （）(Choose three.)
Click the Exhibit button. When designing a DWDM system with multiple amplified spans, a pre-amp is needed at Site B to （）. (Choose three.)
In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?（）
SONET Code Violations (CVs) totals in the PM tables are actually an accumulation of the number of （）.
How is a Thin Film filter fabricated?（）
On an ONS 15454 node you can tunnel an （）.