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<H1><A NAME="_tapi2_linedigitmode__constants"></A>LINEDIGITMODE_ Constants</H1>

<P>The LINEDIGITMODE_ constants describe different types of inband digit generation. 

<DL>
<DT>LINEDIGITMODE_DTMF </DT>

<DD>Uses DTMF tones to signal digits. Valid digits are 0 through 9, '*', '#', 'A', 'B', 'C', and 'D'. </DD>

<DT>LINEDIGITMODE_DTMFEND </DT>

<DD>Uses DTMF tones to signal digits and detect the down edges. Valid digits are 0 through 9, '*', '#', 'A', 'B', 'C', and 'D'. </DD>

<DT>LINEDIGITMODE_PULSE </DT>

<DD>Uses rotary pulse sequences to signal digits. Valid digits are 0 through 9. 
</DD>
</DL>

<P>No extensibility. All 32 bits are reserved. </P>

<P>A digit mode can be specified when generating or detecting digits. Note that pulse digits are generated by making and breaking the local loop circuit. These pulses are absorbed by the switch. The remote end merely observes this as a series of inband audio clicks. Detecting digits sent as pulses must therefore be able to detect these sequences of 1 to 10 audible clicks. </P>

<H4><A HREF="javascript:if(confirm('http://msdn.microsoft.com/library/psdk/sdkintro/guide_927n.htm  \n\n这个文件不能通过 Teleport Pro 取回, 因为 地址在一个域或为它的开始地址设定的边界的外部路径上.  \n\n你想从服务器打开它吗?'))window.location='http://msdn.microsoft.com/library/psdk/sdkintro/guide_927n.htm'" tppabs="http://msdn.microsoft.com/library/psdk/sdkintro/guide_927n.htm">Requirements</A> </H4>

<P><B>&nbsp;&nbsp;Windows NT/2000: </B>Requires Windows NT 4.0 SP3 or later.<BR>
<B>&nbsp;&nbsp;Windows 95/98: </B>Requires Windows 95 or later.<BR>
<B>&nbsp;&nbsp;Version: </B>Requires TAPI 2.0 or later.<BR>
<B>&nbsp;&nbsp;Header: </B>Declared in Tapi.h.</P>
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