sed Ethernet (see "Chapter 9. PTP Deployment Considerations"). G.8262 was republished in full, with an amendment, in March 2020. Link to recommendation: https://handle.itu.int/11.1002/1000/14208 G.8262.1: Timing Characteristics of an Enhanced Synchronous Equipment Slave Clock ITU-T G.8262.1 defines the enhanced Ethernet equipment clock for enhanced SyncE. From the scope of the recommendation: This Recommendation outlines new requirements for timing devices used in synchronizing network equipment that supports synchronous clocks, involved in time and phase transport. It supports clock distribution based on network-synchronous line-code methods (e.g., syn- chronous Ethernet, synchronous optical transport network (OTN) to deliver frequency syn- chronization). This Recommendation focuses on the requirements for the enhanced synchronous Ethernet equipment clock (eEEC) and the enhanced synchronous OTN equipment clock (eOEC). This eEEC (or in newer language, the Ethernet version of the eSEC) is the newer, more accurate al- ternative to the EEC clock of G.8262. Equipment supporting it is starting to become generally avail- able. One additional note is that the eEEC also needs to support the extended range of quality level values (eESMC) described in the latest amendments for G.8264. This recommendation includes the following main topics and appendixes: Frequency accuracy Pull-in, hold-in, and pull-out ranges Noise generation, noise tolerance, and noise transfer Transient response and holdover performance Synchronization input and output interfaces Appendix I, "Relationship between requirements contained in this Recommendation and other key synchronization-related Recommendations" Other appendixes from G.8262 are still valid for G.8262.1 Link to recommendation: https://handle.itu.int/11.1002/1000/14011 8.3.1 Ethernet Synchronization Messaging Channel (ESMC) The concept of carrying information about the source and traceability of a timing signal was covered in previous chapters such as the section "Clock Traceability" in C