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Introduces some basic concepts involved in signal analysis for Huawei Metro1000, mainly including the concepts of downstream signal flow, upstream signal flow, higher-order part and lower-order part.
| Definition | Explanation | Legend |
|---|---|---|
| Downstream signal flow |
This refers to the route where the signal flows to the SDH interface → cross board → PDH (Plesiochronous Digital Hierarchy) interface. |
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| Uplink signal flow |
This refers to the route where the signal flows from the PDH interface → the cross-over board → the SDH interface. |
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| High-order part |
The signal flow for the part of SDH interface ←→ crossboard is the high-order part. |
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| Low-order part |
The signal flow of the cross-unit ←→ PDH interface is the low-order part. |
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The related technical information in this chapter and the SDH equipment troubleshooting process are provided by Shenzhen Optical Transmission Network Technology Company Limited ( www.opticaltrans.com), please retain! Huawei SDH Optical Transmission Equipment,SDH Transmission Equipment for Sale
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