What is ADSL?
What equipment is required to connect ADSL?
How does ADSL work?
The benefits of ADSL
Frequently Asked Questions
|Introducing ADSL |
ADSL (Asymmetric Digital Subscriber Line) is a type of Internet connection that allows you to have high-speed Internet access.
|What is ADSL? |
Asymmetric digital subscriber line (ADSL) is a broadband technology offering Internet access up to 20 times faster than standard dial-up connection. ADSL is an ‘always on’ service that allows you to be on the Internet anytime your computer is turned on.
ADSL uses a special modem that optimises the phone line so that it can be configured to accept both data and voice calls at the same time, allowing you the freedom to make calls from your phone without having to install a second line.
‘Asymmetric’ means data is transmitted ‘downstream’ to the customer faster than it is sent ‘upstream’ to the service provider. This meets the data needs of most Internet users, that is, users who typically download substantially more data than they upload.
The available speeds for ADSL connection are 256/64, 512/128 and 1500/256 kilobits per second (kbps). For example, 512/128 represents the maximum speed achievable for downloads is 512 kbps, while the maximum speed achievable for uploads is 128 kbps.
|What equipment is required to connect ADSL? |
You will require some or all of the following:
|How does ADSL work? |
ADSL offers high speed data rates for fast file transfers and Internet downloads. ADSL uses the copper telephone lines which currently carry your voice traffic to deliver broadband Internet. An ADSL modem connects the telephone line to your computer. The modem splits communication into 2 channels, one for voice (telephone calls) and the other for digital data (computer communication).
Different frequencies are used for each channel to minimise interference and call quality filters are used to further reduce interference from equipment that share the same telephone line, such as fax machines.
ADSL is dependant on the type of telephone line used and whether your local exchange supports ADSL. The distance to the local exchange may also affect the availability of ADSL service.
An ADSL modem transmits information. The phone line’s bandwidth is divided into 249 different bands, and a virtual modem is assigned to each band. Each of these 249 virtual modems tests its band and operates with the slice of bandwidth it is allocated.
The splitter works by separating the noise coming along the phone line into 2 categories; low frequency noise (voice) and high frequency noise (ADSL). The low frequency noise is channelled through to the phone, and the high frequency noise is channelled through to the ADSL modem.
A filter separates unwanted noise in the ADSL line and is fitted to every phone you want to use in your home. Unlike splitters, these are very easy to install.
Either a splitter or filter must be installed to use ADSL if the line is also used for voice calls, fax or other data products.
|The benefits of ADSL |
|Frequently Asked Questions |
Here are some frequently asked questions about the ADSL service. If you have any problems, please call our Customer Care number.How can I make my Internet connection secure?
Are there any special requirements if the building is equipped with a monitored alarm?
Is ADSL available to everyone?
How will I know if ADSL is available to me?
How long will it take for ADSL to be activated?
Can I use my existing ADSL modem?
Why do I need to install a splitter or filter?
Where can I find the minimum system requirements for ADSL?
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