by 
The Curious Bag
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Dial-up Internet service supports connection speeds up to 56 kilobits per second (56kbps). This in itself is far slower than broadband service and will be reflected in slower download times. Other factors can further diminish speed.
Shared Line
Dial-up uses a phone line to connect to a network. A shared lined interferes with the connection anytime someone calls in.
Modem
Slow dial-up modems such as the V.90 and V.44 reduce connection speed. These modems are older than the standard V.92 modems and take longer to dial in to the Internet service provider (ISP).
Line Noise
Line noise -- also known as "hiss" -- occurs when static electricity affects the phone line. The more line noise, the slower the dial-up connection.
Solutions
Upgrading to a faster V.92 modem may significantly improve your dial-up connection speed. Keeping telephone wires away from power cords and printer cables can decrease line noise and improve connection speed.
Further Steps
Contact your telephone company if you are still experiencing slow connection speeds. They can run line checks for interference and investigate the possibility of network failure in your area.
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