The challenges of delivering the PTP telecom profile with the required accuracy are important in Ethernet / MPLS networks. There is also a renewed interest in time testing for both network commissioning and troubleshooting.

NTP remains relevant due to its simplicity, widespread adoption, lower costs, and suitability for scenarios where ultra-high precision is not a critical factor.

The PTP Utility profile is tailored for utility applications, particularly power distribution and smart grid systems, to ensure accurate time synchronization among devices in these critical infrastructures.

This paper reviews techniques of frequency and phase distribution by means of packet networks that require new synchronization architectures. PTP is the key technology for those applications requiring an accuracy of micrfoseconds.