A.255
B.512
C.1024
D.4096
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A.line timing
B.loop timing
C.internal timing
D.through timing
E.external timing
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
最新試題
What three in combination are factors that can cause four-wave mixing in fiber-optic cables? （）(Choose three.)
What is the phenomenon called where different wavelengths of light travel at different speeds?（）
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?（） (Choose two.)
If the power is 0 dBm, what is the power in mW?（）
In order to avoid misconnections due to a failed node in a Bidirectional Line Switched Ring (BLSR), 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?（）
Which device creates an OEO conversion?（）
How is UPSR and BLSR traffic rerouted during a protection switch when a complete fiber cable cut occurs?（）
Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications?（）
What protection method is used in 4F BLSR networks?（）