Three questions about pcmcia modem?

NTDEV
1

Hi, all my friends:

I want to ask three questions.

  1. When I develop a pcmcia modem(gprs/gsm), which model I should
    conform, WDM modem, NDIS modem or WDM-NDIS modem? I don’t clearly know
    their difference.

  2. If I develope a WDM modem, should it appear a virtual serial port?

  3. I see some pcmcia modem’s driver, they only have INF files, how can
    do it? Is serial.vxd can drive pcmcia card?

Sorry for so many questions.

Hope for your answers.

Thanks again!!!