What Is Dialup? What Is Fibre Optic? What Is ISDN? What Is ADSL?

Dialup the slow but yet annoying connection speed some of us had to experience and some of us still do

Dialup is when a modem is used to connect to the wall socket via a cable using a 66-45 cable to connect to the internet.

You require an internal modem for this connection or an external modem, most PCís still come with internal modems and some businessís still use dialup connections for when users go home and use VPN to connect to the companyís servers.

What is fibre optic?

This has also been known as the speed of light, up to the gigabytes. This fibre optic cable has a bundle of glass threads, which have the ability of sending messages modulated onto light wave.

Fibre optic cables have a much greater bandwidth than metal cables. They have less interference, are much thinner and lighter than metal wires. The data is transmitted digitally not analogically.

Fibre optic is very expensive to install as well as being fragile.

What is ISDN?

Meaning integrated services digital network, a standard to send video, voice and data over a digital telephone line. IDSN connection speeds are from 64Kbps

There are two types of ISDN are basic rate interface and primary rate interface.

Basic Rate: Has two B channels consisting of 6Kbps and one D channel for transmitting

Primary Rate: Has 23 B channels and a single D channel.

What is ADSL?

Meaning asymmetric digital subscriber line, this is the most common type of internet world wide in todayís society. This allows more data to be sent across existing copper telephone lines.

ADSL requires a specific modem as now has the capability of wireless as well as Ethernet.

ADSL connection is from 1.5Mbps to 9 Mbps when receiving data. When sending data it can connection up to 16Kpbs to 640kbs


Source: www.articlecity.com