LinuxPlanet: New HOWTO: Modem-HOWTOApr 12, 2001, 13:00 (0 Talkback[s])
(Other stories by David S.Lawyer)
" A modem for a PC may be either internal or external. The internal one is installed inside of your PC (you must remove screws, etc. to install it) and the external one just plugs into a serial port connector on a PC. Internal modems are less expensive, are less likely to to suffer data loss due to buffer overrun, usually use less electricity, and use up no space on your desk."
"External modems are usually easier to install and usually require less configuration. They have lights which may give you a clue as to what is happening and aid in troubleshooting. The fact that the serial port and modem can be physically separated also aids in troubleshooting. External modems are easy to move to another computer."
"Unfortunately most external modems have no switch to turn off the power supply when not in use and thus are likely to consume a little electricity even when turned off (unless you unplug the power supply from the wall). Each watt they draw costs you about $1/yr. Another possible disadvantage of an external is that you will be forced to use an existing serial port which may not support a speed of over 115,200 bps (although as of late 1998 and late 2000 most new internal modems don't either --but some do). If a new internal modem had say a 16650 UART it would put less load on the CPU."