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Network Synchronization

Technologies, products, vendors, standards, measurement and more. It's all about time & frequency.

Time and Frequency


We all know about Time is precious. Frequency is the inverse of time (f = 1/t, 1 Hz = 1/1 sec). Both parameters are correlated. Anyone who have studied communication would understand the time domain versus frequency domain, and its relationship.

What is Netsync


Netsync stands for Network Synchronization. Netsync is referred to both Frequency Synchronization and Time Synchronization. Netsync is the heartbeat to a modern digital communication network, such as your Internet, 3G/4G/5G mobile cellular network, enterprise IP network, SDH/all-IP backhaul transmission network. In fact, this heartbeat is everywhere.

How important is netsync to a digital network? 


This is like you are asking a question on how important is your heartbeat to your body and your health?  When your heartbeat stops, you will die. When your heartbeat is not beating regularly at the right frequency, sometime too fast, sometime too slow, or a sudden heart attack (we call it a phase jump in Netsync), what will happen to your health or what warning your body is giving to you? It is exactly the same kind of questions you would ask to a Netsync expert - how important is Netsync to a digital network. 

Netsync is very specialized


Netsync is indeed a very specialized field of communication technology. Not many datacom engineers, network engineers or computer professionals are familiar with the concept and applications, let alone the technologies, products and measurement aspects. However, it is a very important subject as our communication is moving towards higher and higher speed - from Mega- to Tera- bits per second, in terms of second (period, 1 over frequency), we are talking about nanosecond or picosecond of variation! A timing difference or variation of a few nanoseconds can make the world turned upside down.

So What This Website For


This website is created by the webmaster for the purpose of sharing and as a collection point for all-things related to Netsync. Hope this website can serve as a table of contents (TOC) or a window to connect those who are interested to find out more about this topic out of the sea of data in the Internet. We make it simple for you.

What We have For You


All-things related to Netsync - technologies, standards, marketplace and vendors, products & services, test & measurement aspect, news, articles and resources that you can find it here and download at ease. Of course, your feedback and sharing would make it better.


Basic Concept on Synchronization

The Need for Synchronization, Synchronization Architecture, Synchronization Performance, Introduction to Synchronization Planning

Synchronizing SDH/SONET Network

SDH/SONET Transmission Basics, Performance & Pointer Adjustments, Effect on DS3/DS1/E1 Payload, Synch Planning for SDH/SONET

Fundamentals of Sync Planning

Synchronization Planning Concepts, Synchronization Planning Requirements, Sync Planning for Carrier Networks, Sync Planning for Private Networks

Net Sync Components

Atomic Clock, Cesium, Clock Source, Frequency Switching Circuit, Oven-controlled crystal oscillators (OCX), Phase Comparator, Phase Locked Loop (PLL), Quartz Oscillator, Rubidium

Primary Reference Clock
PRC
Cesium, Rubidium, Frequency Reference
Global Navigation Satellite System
GNSS
GPS, GLONASS, Galileo, Beidou
Synchronization Supply Unit
SSU
SSU, BITS, TSG
Precision Time Protocol
PTP
Grandmaster Clock, Slave & Boundary Clock
Network Time Protocol
NTP
NTP Server
Timing & Frequency Test & Measurement 
Sync Tester
Jitter, Wander, MTIE, TDEV, ADEV