Connectivity

Like most companies you probably conduct at least some work on the internet - whether simply purchasing stationery or running an online business. For this to be a reality you need an internet connection. Almost all of the UK can now get ADSL and a growing number can get SDSL.

What's the difference between ADSL and SDSL?

ADSL: As the name suggests the connection is asymetrical, the download and up load speeds are not the same, typically download speeds range from 256Kbps to 8Mbps the upload never gets above 256Kbps. This can cause problems with large emails or file uploads

SDSL: Does not suffer from the same drawbacks as ADSL and allows communication in both directions to take place at the same rate.

Technologies

ADSL and SDSL

How does it work?

When you have a DSL connection installed a signal similar to the one displayed below is sent over your telephone lines.

Your ear can only hear the red portion of the signal, the low frequencies (shown below).

DSL uses the higher frequencies to transfer data using the same line as your telephone (the blue wave shown below). A micro filter is added to the line to prevent the lower frequencies of speach and faxes etc from interfering with the digital signal. Your DSL modem or router captures the higher frequencies and provides you with your connectivity.