Protecting your Telephone System - UPS (Uninterruptible Power Supply)

In this world of fast changing technology we find ourselves increasingly dependant on the availability of a reliable electricity supply.

All types of essential services, including your Telephone System rely heavily upon electricity to cater for your day to day business operations. However unpredictable power events such as surges, spikes, blackouts and brownouts can damage or destroy electrical components in your telephone system immediately or bit by bit. Damage to your Telephone System can be expensive to repair, not to mention the cost to your company of being without this essential business tool.

Installing the right power protection solution for your Telephone System could save you money, time, data and even lives. Spare a thought for protecting this valuable electrical equipment before it’s too late.


Protection from the Power supplied to your Telephone System

The power you get from the wall outlet is known as “240 volts AC power”.  The power companies try to keep that voltage uniform.  However, lightning, short-circuits, poles knocked down by cars, or some other accident can make the voltage slump or jump by hundreds of volts.

Your Telephone System is designed to run on the normal 240 volts AC supply, with some tolerance for slightly more or less voltage, but they can be damaged by disruptions to the normal 240 volts AC supply that can last for only a few millionths of one second (the “blink of an eye” is thousands of times longer than this).  It can be enough to damage your Telephone System or make it unstable.

Generally there are 4 types of disturbances you will experience with “240 volts AC power”:


  1. Sag –

    This is where the delivered voltage falls below the normal level (i.e. less than 240 volts).  Sags are unlikely to damage most Telephone Systems but they can make them crash or make their operation unstable.  This is also known as a “Brown Out”, although Sag are usually very quick and “Brown Outs” usually last for a number of minutes.

  2. Spike –

    This is where the delivered voltage increases for a very short duration.  Spikes that are large or that last for more than a few millionths of a second can damage your Telephone System.  Short duration spikes can make your Telephone System unstable.

  3. Noise –

    This is a situation where very small and persistent disturbances affect the “240 volts AC power”.  Normally this will not damage your Telephone System but can make its operation unstable.

  4. Outage –

    This, of course, is the ultimate disruption, where there is no voltage at all!


What are the precautions you can take?

Basically there are 2 options, Calculated Risk or Insurance.


  1. Calculated Risk –

    This is where you set aside a large stack of Bank Notes, and some change, to replace your Telephone System if it is damaged or stops working from a power issue.  Also you put up with the inconvenience of those times when the Telephone System is unstable or completely off air.

  2. Insurance –

    You use a smaller number of Bank Notes to purchase a UPS for peace of mind and effective protection.

What types of UPS should you use?

The most cost effective UPS’s for Telephone Systems are “Standby” and “Line Interactive” UPS’s.

The features of both are:


          Standby UPS

As the name implies these units supply power to the connected device from the normal “240 Volt AC power” waiting in Standby Mode for the “240 Volt AC power” to fail.  When this happens, an internal transfer switch operates to switch the load over to the “Battery / Inverter” power source.  High efficiency, small size and relative low cost are the main benefits of the design.  With proper filter and surge circuitry, these units can also provide adequate noise filtration and spike suppression.


          Line Interactive UPS          

The Line Interactive UPS is the most common design used because it is always active on the “Battery / Inverter” power source.  With the Inverter always on and connected to the output sockets, this design provides additional filtering and yields reduced switching transients when compared with the “Standby UPS” design.

In addition, this design usually incorporates functionality to regulate output voltage.  Voltage regulation is an important feature when low voltage conditions exist.  This means that the unit can supply power from the “Battery \ Inverter” power source to make up for the deficiency on the normal power supply.  Also the units will protect against over supply conditions, when more than 240 Volts are being supplied.

High efficiency, small size, relatively low cost and high reliability coupled with the ability to correct low or high line voltage conditions make this the dominant type of UPS used by small to medium businesses.


For an obligation free quote or to discuss your UPS requirements to protect your Telephone System (or other electrical devices) please contact our Service Department.