A.225 ft
B.450 ft
C.655 ft
D.900 ft
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A. SDH circuit over a SONET network delivering it as an SDH signal
B. SDH circuit over a SONET network delivering it as a SONET signal
C. SONET circuit over an SDH network delivering it as an SDH signal
D. SONET circuit over an SDH network delivering it as a SONET signal
A.DUS
B.line timing
C.loop timing
D.internal timing
E.through timing
Click the Exhibit button. When designing a DWDM system with multiple amplified spans, a pre-amp is needed at Site B to (). (Choose three.)
A. offset the OADM loss at site b
B. overcome the high multiplexer loss at site a
C. amplify signal levels after the high loss through Fiber Span 1
D. adjust add channels at site B to be at the same level as the passthrough channels
E. ensure that the per channel power is higher than the minimum needed for the post-amp at Site b
A.none
B.one
C.two
D.three
E.four
A. Each fiber has half of its SONET capacity reserved for protection.
B. Two fibers in the span carry working traffic, while the other two fibers in the span are reserved for protection.
C. The signal is sent simultaneously in both directions around the ring. The receiver determines which fiber to listen to based on signal quality.
D. The signal is sent simultaneously in both directions around the ring. The transmitter determines which fiber has the working bit set for the receiver to acknowledge.
A. They are both regions of lowest loss.
B. They are both regions of low reflections.
C. They are both regions of low index of refraction.
D. They are both regions of low chromatic dispersion.
E. They are both regions of low Polarization Mode Dispersion (PMD).
A. DS-1; E1
B. DS-1; STM-1
C. OC-3; STM-1
D. STS-1; STM-1
E. OC-192; STM-192
A.OSNR
B.dispersion
C.light skew
D.attenuation
A. fiber loss
B. OSNR level
C. post amplification
D. index of reflection
E. index of refraction
F. power post amplification budget
A. OSNR
B. dispersion
C. attenuation
D. power budget
E. amplifier spacing
F. four wave mixing
最新试题
What three in combination are factors that can cause four-wave mixing in fiber-optic cables? ()(Choose three.)
Click the Exhibit button. What is the maximum allowable loss budget between the ONS 15216 Mux (left side) composite output and the ONS 15216 Demux (right side) composite input, with the optical values given in the exhibit? ()(Assume the worst case loss of 4.5 dB for 15216 200 GHz Mux/Demux and ignore power penalties or extra margin.)
Which is a legitimate bandwidth matched pair?()
Scrambling of SONET signals is done to ().
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?()
Given the formula: (Fiber Attenuation * Km) + (Splice Attenuation * # of Splices) + (Connector Attenuation * # of Connectors) + (Optical Fiber or OADM) + Buffer(Fiber aging)) With regard to SONET/SDH optical calculations, what will the given formula provide?()
What are two important considerations when using 2- or 4-channel 15216 OADMs?() (Choose two.)
How is UPSR and BLSR traffic rerouted during a protection switch when a complete fiber cable cut occurs?()
What are three factors that limit the maximum distance of an amplified optical signal without regeneration? ()(Choose three.)
SONET Code Violations (CVs) totals in the PM tables are actually an accumulation of the number of ().