ersus Packet Recommendations." Table 8-1 ITU-T SG15 Q13 Packet-Based Recommendations Phase/Time Partial Phase/Time Full Frequency Support Support G.810 Definitions and Terminology G.8260 G.8261 G.8271 Basic/network requirements G.8261.1 G.8271.1 G.8271.2 G.811 (PRC) G.8272 (PRTC) G.811.1 (ePRC) G.8272.1 (ePRTC) G.8263 (packet slave) G.8273.1 (T-GM) (not yet published) Clock models and perform- G.8266 (packet ance limits G.8273.3 (T-TC) master) G.8262 (SyncE EEC) G.8273.2 (T-BC, T-BC-P, T-TSC, and SO on) G.8262.1 (SyncE G.8273.4 (APTS) eEEC) G.8264 (ESMC) G.8273 (framework) Methods and framework G.8265 (architecture) G.8275 (architecture) Telecom profiles G.8265.1 G.8275.1 G.8275.2 Synchronization layer G.781 G.781.1 (not yet published) functions G.703 (interface definitions) Other documents and GSTR-GNSS (Considerations on the use of GNSS as a primary time reference recommendations in telecommunications) Supplement 68-Synchronization OAM Requirements Use of the terms "master" and "slave" is ONLY in association with the official terminology used in industry specifications and standards, and in no way diminishes Pearson's commitment to promoting diversity, equity, and inclusion, and challenging, countering, and/or combating bias and stereotyping in the global population of the learners we serve. Note that there are several recommendations for PRC and PRTC clocks that are not strictly for packet networks, but they are necessary components of a packet-based timing distribution network, SO they are included. For packet-based transport, the recommendations numbered in the G.826x range (to the left) are concerned with frequency distribution and those within the G.827x range (the right two columns) involve phase and time distribution. 8.1.1 How Recommendations Come About The ITU-T has many sector members, which include a wide range of private and public compan- ies, organizations, educational institutions, service providers, regulators, and governments. About once every 9 months, the complete Study Group 15 is hosted for