Modems have some points: 1) modulation - demodulation 2) need a port to connect to compr 3) have the communication protocols embedded in their microprocessors
Internal Modem:-
Has to connect via virtual communication port(e.g. com3, com4 in windows), which is not directly through linux kernel.
The communication protocol support is all controlled through the s/w drivers & technocal directives(error correction, compression etc.) only as in windows, it doesn't have a microprocesser for this purpose.
As though now it is possible 2 configure Linux with Internal modems, but internal modem cannot give good results. Infact their price is compromised by the phone bills we bear. That's a part of experience. Moreover for SM56 chip, Motorola has officially denounced any driver support.
[IT IS JUST AN INTERPRETATION, I may be wrong also]
Regards
b k sharma
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