Amendment 1 to Recommendation ITU-T G.8261/Y.1361:

aligns the Recommendation to the new ITU-T G.826x document structure by moving the definitions into ITU-T G.8260;

defines the EEC interface network jitter limits;

clarifies some aspects related to reduced synchronous Ethernet function and to the EEC network limits;

clarifies several aspects related to Appendix VI, Measurement guidelines for packet‑based methods.