Amendment 1 to Recommendation ITU-T G.8121/Y.1381 (2012) provides:
- Updating the CW (Control Word) processes.
- Updating some Insert/Extract processes and MIs for OAM such as AIS, LCK,and APS.
- Add new OAM process for AIS/LCK reception and Lock Instruct process.
- Add new process for Dataplane Loopback.
- Update Trail Termination and Adaptation functions in align with the update each process.
- Some editorial updates.