Network clocks get their time signal from a local area network time server. They can receive their signal wirelessly, through Wi-Fi. This is effective if you don’t want to worry about wiring and you have a strong Wi-Fi signal throughout your facility. Network clocks can also receive a wired signal through ethernet cable or “Power over Ethernet (PoE)” clocks.
If your building has ethernet cable already installed to where you want clocks or if you have reliable Wi-Fi, then network clocks are easy to install and run. If not, then you might want to consider a system clock.
System clocks get their time from a master clock. If you are going to be ringing bells or controlling lighting then you will probably benefit from a system clock where the master will have the ability to keep them synchronized.
Network and system clocks each have their advantages and can be beneficial in different ways. Depending on your own unique purpose and how your building is constructed, either one can be the right decision for you. Take the time to understand the difference between both before making the purchase, and you will have the perfect clock system for your facility.