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
Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications?（）
What three in combination are factors that can cause four-wave mixing in fiber-optic cables? （）(Choose three.)
For lasers with tightly controlled wavelengths, approximately how far apart are the centers of adjacent wavelengths when 100 GHz spacing is used in a DWDM system?（）
What are three factors that limit the maximum distance of an amplified optical signal without regeneration? （）(Choose three.)
What are three relevant design considerations when using the 15216 EDFA? （）(Choose three.)
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?（）
On an ONS 15454 node you can tunnel an （）.
What is the phenomenon called where different wavelengths of light travel at different speeds?（）
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?（）
What is the difference between the transmitted power and the sensitivity of the receiver?（）