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WDM trail is the route or logical path where we Transport the traffic
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Trail can be created by NMS
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We have 2 main categories of Trails :
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Electrical & Optical Trails
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Electrical trails has 3 types :
- Client
- ODU
- OTU
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Optical Trails has 4 types :
- OCH
- OMS
- OTS
- OSC
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Each trail has its limits , for example Client trail is between client side ports of the OTU in source and sink sites
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OTU is the transponder which used for OTN framing and colorless/ colored mapping
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Client trail also created with Tributary and line boards
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ODU Trail is created using the Internal logical Port of transponder or tributary/ Line
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OCH is optical trail created between optical modules of the transponders in both source and sink sites
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OSC trail is optional and it’s for DCN mangment to carry the supervisory signal between OSC boards in both ends
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OMS is between MUXs and Demuxs
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OTS is the physical fiber between sites which Carry multiplexed signals
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To create the trail on NMS you have to configure the source and sink shelf , board , port , wavelength , Trail capacity
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I explained with screenshot how to create the trail in previous posts you can check
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