A. dispersion
B. Optical SNR
C. span attenuation
D. four wave mixing
E. receiver sensitivity
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A. the K1 SONET byte； the K2 SONET byte
B. the K2 SONET byte；the K1 SONET byte
C. transmitter switching；receiver detection
D. Line Overhead bytes；Path Overhead bytes
E. Path Overhead bytes；Line Overhead bytes
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. trunking
B. squelching
C. nodal bypass
D. bridge and roll
E. node failure insertion
A. Traffic is switched from the first node receiving the AIS indication.
B. Traffic is switched from the far side of the failure, allowing handshaking to occur.
C. UPSR traffic is switched from the terminating node, BLSR traffic is rerouted from the originating node in the ring.
D. UPSR traffic is switched from the terminating node, circuit by circuit. BLSR traffic is rerouted from the last reachable node in the ring.
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.
最新試題
A Channel ID mismatch occurs when （）.
Scrambling of SONET signals is done to （）.
What is the phenomenon called where different wavelengths of light travel at different speeds?（）
How is UPSR and BLSR traffic rerouted during a protection switch when a complete fiber cable cut occurs?（）
What protection method is used in 4F BLSR networks?（）
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?（）
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 the difference between the transmitted power and the sensitivity of the receiver?（）
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.)