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Delay Ring Indicator on modem

Discussion in 'Electronic Basics' started by [email protected], Jan 18, 2005.

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  1. Guest

    Hi,

    I'd like to use my modem to wake up my PC, but the modem sets the Ring
    Indicator as soon as the phone rings. Ideally I'd like it to wait for,
    say, 20 seconds and only set the Ring Indicator if the phone is still
    ringing.

    So I thought maybe I could put some kind of circuit between the modem
    and the PC which would block the RI line unless the RI line had been
    set for 20 seconds or more.
    Can anyone suggest how this might be done?

    Thanks,

    Hajo
     
  2. Lord Garth

    Lord Garth Guest

    Use a counter that is triggered by the ring signal. Don't forget to reset
    the counter
    after you are booted.
     
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