What is PoE ?

Saturday, 20 November 2010 00:00 Written by  JADEN Computers Read 11544 times

Power over Ethernet (PoE) operation


Power over Ethernet (PoE) Operation

Power over Ethernet (PoE) is a network standard based on IEEE 802.3af and 802.3at that provides a means of delivering DC power to Ethernet connected devices. This technology eliminates numerous AC wall transformers, allows centralized UPS backup, and is fully compatible with powered and non-powered 10/100/1000 BaseT Ethernet devices. Adding PoE to a network can be accomplished by placing simple multiport PoE network switch in a switch room or endpoint. PoE network switches can be purchased from Synchronised Time Australia.






Do I need PoE fro Accurate Time?

NO, there are several Wireless analogue battery and digital AC Adapter NTP clock options available. Accurate synchronised time is all about a common accurate time source being a device that responds to NTP requests, BOTH PoE and WIFI clocks reference such a source that may be internal to your network or one of many free external public NTP servers.


Do I need a Master clock for my clocks to work from?

NO, there is no requirement for a master clock and the clocks we recommend are not ‘slave’ devices they operate independently. The failure of one clock has no effect on other clocks AND there is NO ‘Master’ clock to fail generally at significant cost affecting ALL clocks. We are happy to source and recommend GPS based NTP server solutions the most cost effective can be viewed HERE.


I would like to use my WiFi network and don't want to run network cables or AC power,... i want the simplest deployment!

The best option here is wireless NTP analogue clocks as they require far less power and can be successfully powered by one set of batteries for 3 – 5 years. Deployment is very simple, just enter the WIFI network details, power and hang the clock. All WIFI battery powered clocks can be supplied with a security bracket to prevent theft and most vendors offer corporate logo services for the clock face that adds to the clocks appearance while making it less attractive to theft, some vendors DO NOT charge for this service. Click HERE for more information and assistance.

What if I have AC power or even DC power from an external battery and want accurate time/count down-up displays that can be used outside (IP65) or inside but don't have WiFi or PoE?

That’s fine we have a wide range of small to very large format LED displays that utilise GPS for time sync, can be located indoors or outdoors. Click HERE for more information and assistance.


Why PoE digital?

 digital is a clear indication of time available in ALL light conditions, easy to read 100 mm high digits, with excellent visibility up to 30 metres or 100 feet.Ddigital clocks come in a wide variety of 4 and 6 coloured digits to suit all preferences and environments. Digital PoE clocks suit all areas of Industry, Manufacturing, Corporate, Emergency Services, Call Centres, Schools, Colleges, Universities, Police and Sports Centres.



Why PoE analogue?

Analogue clocks  represent the traditional clock appearance and while ALSO providing a clear indication of time the clock DOES NOT emit light and is better suited to hospital or similar light sensitive environments while ALSO being ideal for radio stations where time is read and broadcast in the traditional style of ‘five to ten’ rather than ‘nine fifty five’, this saves the conversion of digital time back to the analogue format which can be confusing when under pressure. Analogue clocks ALSO have excellent visibility (30 cm clock face) up to 30 metres or 100 feet. They are available in 12” and 15” diameter faces.


We also provide Time/Countdown, Time/Text Display and Time/Alarm synchronised network clocks as well as GPS based NTP time servers.


Last modified on Saturday, 06 February 2016 16:03


""Removed a very destructive virus. Thanks""

In Response To: Virus

Infected Personal Computer

""Great website! Now my patients can easily fill out patient forms online""

In Response To: Web Site

Web Site Design For Professional Practitioner.

""Very Helpful article and information. Keep Up the Good Work!b""

In Response To: Facebook page

Facebook page

""Very Helpful and friendly information...for free!!""

In Response To: Forum question

Online help forum