What is ADSL?
ADSL ("Asymmetric Digital Subscriber Line") is a type
of DSL. It works by splitting your existing telephone line signal
into two, one for voice and the other for data. ADSL technology
can work at up to 8Mbps download. The most popular services in the
UK at the moment are running at speeds of 512Kbps (approx. 9 times
faster than a modem), although speeds of up to 2Mbps can be obtained.
Upload speeds are 256Kbps on all products and hence this is why
it is "asymmetric", because the download speed is different
to the upload speed.
How does ADSL operate in the UK?
The majority of services are available through a broad range of
ISPs who are reselling products from network operators such as British
Telecommunications ("BT Wholesale") and Kingston Communications.
It is the responsibility of the network operator to deliver your
data (whether it be transmitted using a standard modem, ADSL or
some other means) to and from your ISP of choice. It is a common
misconception that "BT Openworld" is the only source of
DSL service - in fact, "BT Openworld" is just one of many
ISPs competing for your business.
What do I need to get online with broadband internet?
You can either be connected via a BT phone line (or anyone else
who may be operating the phone lines to your house/business) or
via cable (e.g. NTL or Telewest). You need "splitters"
on all your phone lines as both data and voice can be carried down
the same cables. You also need a broadband modem. A lot of companies
offering broadband offer good deals on the modems needed too. Generally
you will need a Windows 98 machine or later.
A Micro-Filter(splitter) for each Phone Socket
A micro-filter is designed to plug into your phone socket (similar
to a standard splitter used to connect multiple telephones). Its
purpose is to separate voice from data and must be connected to
each phone socket in your house. If you do not have a telephone,
or any device which uses the phone line, a micro-filter isn't required.
Most ISPs and retailers sell micro filters.
How fast is broadband?
Broadband internet is often compared as the difference between a
colour television and a black and white one. Almost without exception,
people who have experienced broadband internet do not go back to
"narrowband" internet (also known as Dial up Internet
as you need to dial in each time to connect).
Advantages of broadband internet?
Because broadband internet is effectively "always on"
you never need to "dial up" to get connected to the internet
- all you need do is switch your PC on.
Broadband is obviously much faster (up to 10 times faster) than
"Dial up" - which opens up a whole new world of entertainment
facilities, live downloads for music etc. Obviously the time spent
online waiting for downloads is greatly reduced.
You only need one phone line to be able to connect to the internet
whilst also having other family members still able to make telephone
calls or receive calls. So whilst broadband is generally more expensive,
the savings made by not having a dedicated phone line installed
for other family members will probably pay for itself anyway.
