Summary

Recommendation ITU-T G.709/Y.1331 defines the requirements for the optical transport network (OTN) interface signals of the optical transport network, in terms of:

–           OTN hierarchy

–           functionality of the overhead in support of multi-wavelength optical networks

–           frame structures

–           bit rates

–           formats for mapping client signals.

Corrigendum 1 corrects the value set of n_i in clause 17.12.