Basic Steps

To build the OTN Client circuit the following basic steps are required once the hardware modelling is complete:

1)WDM Layer - Build DWDM Layer between the OTN Multiplexers – recommend terminating 1 Ch WDM TC on Virtual Pre-Connect Port VP within the DWDM facing SFP. Provided using coloured SFP. Pre-Connects will be needed in the SFP Template to map the VP to both the TX and RX ports of the SFP

2)OTN Parent Layer – Start building highest level typically either OTN TC OTU2 or OTU4 starting at the VP Port <*>. Alternatively internal switching cards could be used as starting point. Route the OTU2/OTU4 over the WDM Channel

3)OTN Child Layer – Build required ODx OTN TC starting from the inner port of a client facing SFP Port. Route the ODUx over the parent OTN TC. Note that the parent OTN TC will typically accept multiple child OTN TC

4)Client Layer – Client TC such as Ethernet/Sonet or SDH can now be created and routed either through the outer port or starting at the outer port of the client SFP

Basic Model

WDM Layer TC

OTN Layer TC

Client Layer TC

Example Network Topology

Client Routing

OTN ODU0

Routing

OTN ODU2 Routing

DWDM Path A->Z

Part I

DWDM Path Z->A

Part II

1G Client Schematic without DWDM layer

1G Client Schematic with DWDM layer