Narrowband Dialup
One of the oldest forms of internet access technology is Dialup. It uses a simple adaptor known as a modem to plug directly into a standard telephone line. The modem then converts the computer’s digital data signal to a transmission that may be sent over the voice line for communication with an ISP or remote computer. The standard voice call charges of your existing telecoms operator apply for every minute of use.
Unfortunately, this kind of internet access is very slow and susceptible to line interference. The good thing is that with it is very flexible and useful with its ability to plug in to almost any phone line.