What is ADSL?
FAQ - ADSL Queries

Speed What is ADSL?   ADSL (Asymmetric Digital Subscriber Line) is a high-speed Internet access service that uses your existing telephone line to send and receive data digitally at speeds that far exceed that available through analog dial-up modems.  ADSL uses a digital frequency, whereas telephone and fax machines use an analog signal.  Because the ADSL signal is operating on a different frequency, the telephone can be used normally, even when surfing the Web with your ADSL service.   



What are the advantages of ADSL over dialup connections?  

  • You can make and receive telephone calls at the same time as you are surfing the net
  • You can surf the net and send/receive emails at a much faster speed enabling you to download and upload files of much larger sizes.


Can I get ADSL?

The easiest way to check is to contact a local ADSL provider and get them to check your line.  Just because you have a telephone line you are not guaranteed to be able to obtain an ADSL service.  Basically, the higher the frequency that is used to send a signal over a piece of wire, the faster that signal will degrade over distance. Because ADSL uses very high frequencies, there are limits over the distance that the signal can be reliably received.  For example: a 512Kbps ADSL service has a maximum range of 6 km, because of the higher bandwidth required a 2Mbps ADSL service has a smaller radius of 3.5km.

This means that only customers within this radius of the telephone exchange can take advantage of ADSL.   The second main parameter affecting the speed of your connection will be your Internet Service Provider's bandwidth capacity.    

Similarly the quality of the line leading from the exchange to your house will affect the quality of service available. Since the majority of telephone lines on the Costa Blanca are still overhead cables rather than underground fibre optic lines our telephony services are somewhat inferior to those routinely available in the UK.  Our overhead lines are subject to sun damage which causes the lines to go brittle and the joints can suffer from ingress of rain.  Our lines can also be hit by lightning causing damage.


Can 2 or more computers share my ADSL connection?  

Yes, depending on your router.  Most modern routers come with multiple network cable sockets and wireless capability.  This means that you can connect multiple devices, i.e. computers, smartphones. tablets and internet TVs either via a network (LAN) cable or through a wifi network.


What factors affect the performance of an ADSL connection?

  • The quality of the phone line at your house, the distance from your house to the exchange and the quality of connection to the exchange, for example fibre optic lines give a much better connection to the exchange than the old copper wires, similarly underground cables are less likely to suffer from atmospheric interference, soaked joints and lightning strikes.
  • Spyware or viruses on your computer can drastically affect the bandwidth you have available by consuming bandwidth for their own devices. We recommend that you install a reliable spyware detection/removal program onto your computer and run it on a weekly basis, we recommend Malwarebytes.  Please note that spyware detection/removal programs do not replace your anti-virus program, which you should also keep updated and use to scan your computer on a regular basis.
  • The number of devices connected to your ADSL supply at any one time.  If you only have your laptop connected to your ADSL supply, then the full ADSL speed is available for use by this device however if you connect another device, i.e. an iPad then the ADSL supply will be shared between the two devices.  Obviously therefore the more devices you connect the more your ADSL is diluted.








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