NTT Communications plan the field trial of disaggregated transport network controlled by ONOS. For the field trial, we will deploy them in our wide area testbed network environment used for R&D activities to evaluate the ONOS from the perspective of commercial service deployment. Toward the deployment, we have been developed a few of new functions of ONOS with ON.Lab that are required to control disaggregated transport network. In this session, we will show our initial deployment plan and current status, functions of ONOS that have been developed for our deployment, and our future deployment plan.