Questions & Answers
Answers & Questions often asked by our customers…
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IP Telephony Explained
IP Telephony can be broken up into two key parts – Trunks and Handsets.
Trunks; The telephone trunk is the connection to the outside world. Therefore an IP Trunk is a connection using the TCP/IP suite of protocols, which is the communications protocol of nearly all business networks and the internet. IP trunks use what is known as a Session Initiated Protocol (or SIP) to connect from point to point, thus providing a connection. Telephone conversations (or Voice calls) are converted to data packets and are translated from point A to point B using the SIP protocol. Quality of Service (QoS) …
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Security System – Routine Maintenance Requirements
In order to ensure that your intruder alarm and security system are in full working order, we believe that intruder alarm systems should be checked at least annually.
Our technicians carry out the following tasks during our routine maintenance visits;
Check external siren and strobe function
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Check internal screamer function
Check all movement, reed switch, perimeter and other detectors
Check all smoke and heat detectors
Check any duress or panic buttons
Check any wireless devices such as keyfobs, detectors etc. Replace batteries as required
Change system batteries
Update (Add/Remove) user codes as required
Clean all keypads
Check reporting functions to Central Monitoring Station
Re-apply new window stickers and signage as required
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Digital Signal Strength for Free-to-Air Transmissions
When the analog signal is turned off, the digital signals will continue as they are now.
Digital signals do not interfere with any other transmission.
The digital signals have been designed to cover the same type of area as the existing analog services. They have been planned so that the frequency and power of each digital transmission does not interfere with any other transmission and have generally been provided with the maximum power available.
Digital signals and analog signals transmitting from the same tower do not adversely effect signal strength
Each and every transmitter site is planned and the digital transmitters that …
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PC & Video Resolutions Compared
Take a moment to digest the below image. It diagrammatically represents all common PC and Video resolutions showing the extent of the image size.
The two most common ratios are 4:3 (traditional video) and the current standard for high definition video 16:9. There are many other ratio variations, however they are less common than 4:3 and 16:9.
PC’s, monitors, laptops, projectors, screens and interactive boards all have a definitive native resolution. This graphic can assist in making comparisons between them.
Download a PDF version here.
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IP Telephony Explained
IP Telephony can be broken up into two key part – Trunks and Handsets.
Trunks; The telephone trunk is the connection to the outside world. Therefore an IP Trunk is a connection using the TCP/IP suite of protocols, which is the communications protocol of nearly all business networks and the internet. IP trunks use what is know as a Session Initiated Protocol (or SIP) to connect from point to point, thus providing a connection. Telephone conversations (or Voice calls) are converted to data packets and are translated from point A to point B using the SIP protocol. Quality of Service (QoS) …
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Why should I use a Short Throw Projector?
Projectors have varying projection distances (or focal lengths). It is the lens within the projector that determines the focal length of a projector. Standard lenses are fairly inexpensive to make, and thus are the most common. A standard lens put’s the projector approx. 3m back from a standard sized (86″-100″) screen.
Short throw lenses can be more specific in application and thus are often sold as a ‘feature’. Short throw lenses put a typical projector approx. 1-2m back from a standard sized (86″-100″) screen.
Ultra-Short Throw projectors have been designed specifically for interactive whiteboards. Ultra short throw lenses have been carefully ground …
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What is the fibre optic colour code?
Fibre Optic cores have a defined colour code. They are defined by a standard called TIA-EIA-598-A as a colour coding to identify their position in a single tube. Here are the colours used and the position they represent:
For 13 fibres and higher the colour code is repeated every 12 and the buffered fibres or sub-cables are striped once for every additional 12.
13 = Blue with one stripe
14 = Orange with one stripe
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25 = Blue with two stripes
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