External modem


Details on External modem

Details on External modem are

External modem are same as internal modems in operations

The only difference between internal and External modems is that External modems does not have UART rather it uses serial port of PC using 9 pin or 25 pin serial cable.

External modem are easy to setup as do not have to worry about IRO and I/O address settings.

It also has several LED indicators to indicate status of various signals hence in case of any problem debugging is very simple.


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