External modems connect to the computer through a peripheral port, such as USB, serial, and COM ports. They come in a self-contained box outside the computer, unlike internal modems which are mounted onto card slots in the CPU. Their primary advantage over internal modems is their use of indicator lights, which allows users to monitor connection status and troubleshoot connection problems. They are also easier to install and may be transferred or shared between computers.
Types Of External Modems
Kinds of External Modems include the following:
Dial-up external modems
Dial-up external modems transmit data using analog phone lines.
They have maximum speeds of 56 kilobits per second (kbps), although average speeds may be much lower.
Most models have software-based fax capabilities.
High-speed external modems
High-speed external modems use high-frequency telephone signals (DSL modems) or cable lines (cable modems) to send and receive data.
They maintain a dedicated connection, eliminating the need to dial up to establish a connection.
They can reach speeds 100 times faster than dial-up modems, although providers usually offer full speeds only to premium subscribers.
Choosing External Modems (Buying Tips)
Status lights: Choose an external modem with status lights for connection and Internet activity. This will allow you to isolate problems when the connection fails. Look for one with color-coded lights to alert you of connection problems. If you have poor vision, look for a model that has sound indicators as well. Interface: Choose a serial port modem if you frequently download or send large files because it has better data capacity than USB. USB modems are ideal if you have two computers and do not have a router for connection sharing.
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