Heres one I found a while back.

    <style type="text/css">
        .Display { width:500px; height:50px; }
        .st1 { color:#000000; text-decoration:none; font-weight:bold; }
        .st2 { color:#cc0000; text-decoration:none; font-weight:bold; }
    </style>
<script language="JavaScript" type="text/javascript">

    function tel_Initialize()
    {
      VTapi1.deviceID = 0;               // first available device
      VTapi1.SilenceLevel = 1023;        // silence lever
      VTapi1.SilenceDuration = 16000;    // OnSilence will be fired in 16
seconds
      VTapi1.AGC = 1;                    // automatic gain control is
enabled
      VTapi1.Flags = 0xff;               // enable everything

      Status.innerText = "Ready";
      Modem.innerText  = "closed";
      Ring.innerText   = "";
      Dtmf.innerText   = "";
      Line.innerText   = "";
      Cid.innerText    = "";
    }   

    function tel_beginDialing(Telephone)
    {
      Status.innerText = "Open modem...";
      if(VTapi1.Open())
      {
         Status.innerText = "Dialing...";
         VTapi1.Dial( Telephone );
      }
      else
      {
         Status.innerText = "Error";
         parent.alert("Error: didn't open device!");
      }
    }
    function tel_beginDialingOut(Telephone)
    {
        tel_beginDialing("9"+Telephone);
    }
</script>

<script for="VTapi1" event="onOpened(str)">
    Modem.innerText = "opened: " + str;
</script>

<script for="VTapi1" event="onClosed">
    tel_Initialize();
</script>

<script for="VTapi1" event="OnRing(n)">
    Ring.innerText ++;
</script>

<script for="VTapi1" event="OnDtmf(k)">
    Dtmf.innerText = Dtmf.innerText + String.fromCharCode(k);
</script>

<script for="VTapi1" event="OnBusy">
    Line.innerText = "Busy";
    VTapi1.Hangup();
</script>

<script for="VTapi1" event="OnDialtone">
    Line.innerText = "Dialtone";
</script>

<script for="VTapi1" event="OnCallerID(Number,Name)">
    Cid.innerText = Name + " _ " + Number;
</script>

<script for="VTapi1" event="OnDataModem">
    Modem.innerText = "VTapi does not work with DATA modems!!!";
</script>

<script for="VTapi1" event="OnSilence">
    Line.innerText = "Silence";
</script>

<script for="VTapi1" event="OnHardwareDialtone">
    // VTapi1.AssumeConnected();
</script>

<script for="VTapi1" event="OnFrequency(f,f1,f2)">
</script>

<script for="VTapi1" event="OnConnected">
    Status.innerText = "Connected"
    VTapi1.AnalyseInput();
</script>

<script for="VTapi1" event="OnAnswered">
    Status.innerText = "Answered";
</script>

<script for="VTapi1" event="OnIdle">
    VTapi1.Hangup();
    VTapi1.Close();
</script>

<script for="VTapi1" event="OnError">
</script>

<center>
    <object classid="clsid:9A2D05A8-50D2-4490-9D0E-D89A52FE9B9B" id="VTapi1"
class="Display">
     <param name="m_deviceID" value="0">
     <param name="m_SilenceLevel" value="1023">
     <param name="m_SilenceDuration" value="16000000">
     <param name="m_BackgroundColor" value="0">
     <param name="m_ForegroundColor" value="61184">
     <param name="m_SpotColor" value="255">
     <param name="m_AGC" value="1">
     <param name="OnDebug" value="onDebug">
     <param name="OnOpened" value="onOpened">
    </object>
    <table border="0" width="50%">
        <tr>
            <td width="20%" align="left" class="st1">Status:</td>
            <td class="st2" align="left" width="80%" id="Status">&nbsp;</td>
        </tr>
        <tr>
            <td width="20%" align="left" class="st1">Modem:</td>
            <td class="st2" align="left" width="80%" id="Modem">&nbsp;</td>
        </tr>
        <tr>
            <td width="20%" align="left" class="st1">Rings:</td>
            <td class="st2" align="left" width="80%" id="Ring">&nbsp;</td>
        </tr>
        <tr>
            <td width="20%" align="left" class="st1">DTMFs:</td>
            <td class="st2" align="left" width="80%" id="Dtmf">&nbsp;</td>
        </tr>
        <tr>
            <td width="20%" align="left" class="st1">Line:</td>
            <td class="st2" align="left" width="80%" id="Line">&nbsp;</td>
        </tr>
        <tr>
            <td width="20%" align="left" class="st1">CallerID:</td>
            <td class="st2" align="left" width="80%" id="Cid">&nbsp;</td>
        </tr>
    </table>

    <form action="#" name="Page">Phone number:
        <input type="submit" value="Dial: <?php echo $telephone; ?>"
onClick="tel_beginDialingOut('<?php echo $telephone; ?>');return false;"
/>
        &nbsp;
        <input type="submit" value="Hangup" onClick="VTapi1.Hangup();return
false;">
    </form>
</center>

<script language="JavaScript" type="text/javascript">
tel_Initialize();
</script