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
A Channel ID mismatch occurs when （）.
What three in combination are factors that can cause four-wave mixing in fiber-optic cables? （）(Choose three.)
SONET Code Violations (CVs) totals in the PM tables are actually an accumulation of the number of （）.
How is a Thin Film filter fabricated?（）
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 an advantage of an externally modulated laser over a directly modulated laser?（）
Click the Exhibit button. Given the following parameters: transmitter output (min): -2 dBm receiver input (min): -28 dBm 15216 Mux and Demux loss: 4.5 dB 16 channels maximum In which sites shown in the exhibit could the 15216 EDFAs be placed to minimize the number of EDFAs needed?（）
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?（）
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Which device creates an OEO conversion?（）