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NE20E-S2 V800R010C10SPC500 Configuration Guide - System Management 01

This is NE20E-S2 V800R010C10SPC500 Configuration Guide - System Management
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Overview of G.8275.1

Overview of G.8275.1

Concepts of G.8275.1

ITU-T G.8275.1 defines the precision time protocol telecom profile for phase/time synchronization with full timing support from the network. G.8275.1 is defined as a time synchronization protocol.

A physical network can be logically divided into multiple clock domains. Each clock domain has its own independent synchronous time, with which clocks in the same domain synchronize.

A node on a time synchronization network is called a clock. G.8275.1 defines three types of clocks:
  • A Telecom grandmaster (T-GM) can only be the master clock that provides time synchronization.

  • A Telecom-boundary clock (T-BC) has more than one G.8275.1 interface. One interface of the T-BC synchronizes time signals with an upstream clock, and the other interfaces distribute the time signals to downstream clocks.

  • A Telecom time slave clock (T-TSC) can only be the slave clock that synchronizes the time information of the upstream device.


The NE20E can function as the T-BC only.

Updated: 2019-01-02

Document ID: EDOC1100055400

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