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What are the two options for implementing fax using an internal ISDN card?
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Answer Posted / silpa
To send and receive faxes, an ISDN card needs to perform digital conversions, as if it were an analogue modem.
It can do this by having an on-board Digital Signal Processor perform the conversion, or it can off-load the task to the processor of the host PC and use a 'soft modem' application.
The trade-off between the two is that DSP chips are sophisticated technology and are therefore expensive, whereas using software to perform the conversion can take up a significant amount of the processing power of the computer.
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