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SNCP is sub network connection protection.
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It can protection optical networks against equipment failure or fiber cut.
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SNCP has 2 types (E & O).
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O SNCP mean optical and E mean electrical.
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O-SNCP can be implemented by assigning 2 different devices and routes for rhe same optical signal.
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For traffic protection we send the same signal twice and selectively receive the main.
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In case of main signal become unavailable , receive transponder will switch to standby.
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It’s called dual sending & selective receiving in Huawei or as Nokia called it head end bridging and tail end switching.
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We have 2 options available to implement O SNCP :
- Through Y cable
- Through OPS card
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Through Y cable the transponder itself will perform the switching.
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Through OPS card ( optical protection switching ) the OPS perform the switching.
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Here In OPS we have the chance to Improve the survivability by placing the main and standby transponder in 2 different shelves.
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