Hello! I'm new in this network infrastructure and i have to create a fiber ring between 3 ons 15454 dwdm but i managed only to make an osc between them . On every platform i have an transponder 2.5Gbps. My problem is that i can't create some provisionable patchcord and also some ochcc,only ochnc and when i activate the transponders my rx com line on every opt-bst show me an "incoming payload signal absent" error. Can anyone give me some advice or some steps to follow in creating this ring ? Hope i've been clear and sorry my poor english. Thank's a lot!