Supplement 67 to ITU-T G-series Recommendations (ex. G.Sup.5gotn) describes the use of existing optical transport network (OTN) Recommendations [ITU‑T G.709] and the [ITU‑T G.709.x] series in order to address the requirements for supporting 5G transport in the 5G transport networks as described in [ITU‑T GSTR‑TN5G].