Many people prefer the out side modem which is cumbersome as it has to have a separate power supply, I prefer the internal modem as it is clean and inside the pc is also easy to setup. once setup internal modem works the best no cumbersome connections no hanging wires no chance of dropping and space constraints no power supply required. my choice is of the motorola internal 56 kbps modem. I have also tried the d link modem it is also good and is in the same range but the more popular one is the motorola. in early stages I have also tried the lucent modem though it was good but it is not available these days.
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