Summary - G.8275.1 (02/2026) - Precision time protocol telecom profile for phase/time synchronization with full timing support from the network

Recommendation ITU-T G.8275.1 specifies a profile for telecommunication applications based on the precision time protocol (PTP) as defined in IEEE 1588. The profile specifies the PTP functions that are necessary to ensure network element interoperability for the delivery of accurate phase/time (and frequency) synchronization. The profile is based on the use of full timing support (FTS) from the network architecture described in Recommendation ITUT G.8274 and definitions described in Recommendation ITUT G.8260. Common aspects of PTP profiles for phase/time synchronization are specified in Recommendation ITUT G.8275.