A. 1+1 is based on APS， while 1：1 is based on IPS.
B. 1：1 is used in SNCP switching， while 1+1 is used in MS-SPRing switching.
C. 1+1 sends signals on Working and Protect paths， while 1：1 sends signals only on Working path.
D. 1+1 sends signals on Working path ONLY， while 1：1 sends signals on both Working and Protect paths.
您可能感興趣的試卷
你可能感興趣的試題
A. 10
B. 32
C. 64
D. 84
E. 96
A. line timing
B. loop timing
C. internal timing
D. through timing
E. external timing
最新試題
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？（）
Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications？（）
What is the difference between the transmitted power and the sensitivity of the receiver？ （）
Click the Exhibit button. Which type of multiplexer is shown in the exhibit？（）
How is SNCP and MS-SPRing traffic rerouted during a protection switch when a complete fiber cable cut occurs？（）
If node 2 is accepting line timing from node 1， node 2 will send （） to node 1 as its SSM messge.
What are two major differences between MS-SPRing and SNCP？（）
The ONS 15216 is a 32-channel system. The ONS 15216 OADMs are capable of adding and dropping one， two， or four channels. How are the OADMs provisioned to add and drop specific channels？（）
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.） （）
What is the phenomenon called where different wavelengths of light travel at different speeds？（）