Going Online

3. Getting Connected

3.1 The simplest option is to connect through your telephone line.

• This method of connection is suitable for simple email, Internet browsing and limited file transfer for a small number of users.
• There may be delays if several people attempt to share one line or one modem or you are trying to transfer anything other than small amounts of information.
• The maximum speed for data transfer is usually around 40Kb per second.
• You cannot use the line for voice calls while you are connected to the Internet.
• If your usage will be light, this will probably be the most cost-effective method of connection. Most Internet service providers offer a 'pay-as-you-go' service, so you are charged for a local-rate call all the time you are online. Or you can buy unlimited access for a set monthly fee (between £10 and £20) if you want to spend more time online.
• You will need to buy a modem to connect if one is not already built in to your computer. Buy the fastest modem - certainly not one that offers less than 56Kb speed.

3.2 Superseding ISDN connections, ADSL or broadband is now the fastest and most cost-effective way of communicating.

• The connections are always on - there is no need to dial. Voice calls can be carried through the same line simultaneously.
• Charges are fixed, usually on a monthly basis, although you can make a saving by paying up-front annually.
• Service availability can be restricted by your proximity to the local telephone exchange and whether the exchange has been modified to accept broadband connections.
• A range of data transfer speeds - with different pricing - options are available.
• ADSL capability is shared across a number of users, measured as a 'contention ratio'. The lower the connection ratio, the higher the speed will be.

3.3 ISDN2 is a high-quality digital link, using the existing phone wires. It effectively gives you two high-capacity digital lines.

• The larger, more powerful ISDN30 will probably be more economical if you need more than, say, eight lines.

3.4 If you have a large number of users and need to move lots of information around your network, you may consider a leased line.

• A leased line is a direct connection to the Internet using special cabling that your company exclusively uses.
• Leased lines are the oldest and most reliable forms of permanent connection to the Internet.
• Speeds range from 64Kb to more than 1,500Kb per second. Faster connections are more expensive.
• Leased lines are the most costly options, with charges up to £1,400 per month.