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<H1><A NAME="_tapi2_linedevcapflags__constants"></A>LINEDEVCAPFLAGS_ Constants</H1>

<P>The LINEDEVCAPFLAGS_ bit-flag constants are a collection of Booleans describing various line device capabilities. 

<DL>
<DT>LINEDEVCAPFLAGS_CALLHUB</DT>

<DD>Indicates whether call hubs are supported on this line. This flag is exposed only to applications that negotiate a TAPI version of 3.0 or higher.</DD>

<DT>LINEDEVCAPFLAGS_CALLHUBTRACKING</DT>

<DD>Indicates whether call hub tracking is supported on this line. This flag is exposed only to applications that negotiate a TAPI version of 3.0 or higher.</DD>

<DT>LINEDEVCAPFLAGS_CLOSEDROP </DT>

<DD>Specifies what happens when an open line is closed while the application has calls active on the line. If TRUE, the service provider drops (clears) all active calls on the line when the last application that has opened the line closes it with <A HREF="func1_2zhh.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_2zhh.htm"><B>lineClose</B></A>. If FALSE, the service provider does not drop active calls in such cases. Instead, the calls remain active and under control of external devices. A service provider typically sets this bit to FALSE if there is some other device that can keep the call alive, for example, if an analog line has the computer and phone set both connect directly to them in a party-line configuration, the offhook phone will automatically keep the call active even after the computer powers down. 

<P>Applications should check this flag to determine whether to warn the user (with an OK/Cancel dialog box) that active calls will be lost. 
</DD>

<DT>LINEDEVCAPFLAGS_CROSSADDRCONF </DT>

<DD>Specifies whether calls on different addresses on this line can be conferenced. </DD>

<DT>LINEDEVCAPFLAGS_DIALBILLING </DT>

<DT>LINEDEVCAPFLAGS_DIALDIALTONE </DT>

<DT>LINEDEVCAPFLAGS_DIALQUIET </DT>

<DD>These flags indicate whether the "$", "@", or "W" dialable string modifier is supported for a given line device. It is TRUE if the modifier is supported; otherwise, FALSE. The "?" (prompt user to continue dialing) is never supported by a line device. These flags allow an application to determine up front which modifiers would result in the generation of a LINEERR. The application has the choice of pre-scanning dialable strings for unsupported characters or of passing the "raw" string from <A HREF="func2_69mb.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_69mb.htm"><B>lineTranslateAddress</B></A> directly to the provider as part of functions such as <A HREF="func1_7mgc.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_7mgc.htm"><B>lineMakeCall</B></A> or <A HREF="func1_0p0s.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_0p0s.htm"><B>lineDial</B></A> and let the function generate an error to tell it which unsupported modifier occurs first in the string. </DD>

<DT>LINEDEVCAPFLAGS_HIGHLEVCOMP </DT>

<DD>Specifies whether high-level compatibility information elements are supported on this line. </DD>

<DT>LINEDEVCAPFLAGS_LOWLEVCOMP </DT>

<DD>Specifies whether low-level compatibility information elements are supported on this line. </DD>

<DT>LINEDEVCAPFLAGS_MEDIACONTROL </DT>

<DD>Specifies whether media-control operations are available for calls at this line. </DD>

<DT>LINEDEVCAPFLAGS_MSP</DT>

<DD>Indicates whether a Media Service Provider (MSP) is associated with the line. This flag is exposed only to applications that negotiate a TAPI version of 3.0 or higher.</DD>

<DT>LINEDEVCAPFLAGS_MULTIPLEADDR </DT>

<DD>Specifies whether <A HREF="func1_7mgc.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_7mgc.htm"><B>lineMakeCall</B></A>, <A HREF="func1_0p0s.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_0p0s.htm"><B>lineDial</B></A>, <A HREF="javascript:if(confirm('http://msdn.microsoft.com/library/psdk/tspi21/func2_0r8s.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/tspi21/func2_0r8s.htm'" tppabs="http://msdn.microsoft.com/library/psdk/tspi21/func2_0r8s.htm"><B>TSPI_lineMakeCall</B></A>, or <A HREF="javascript:if(confirm('http://msdn.microsoft.com/library/psdk/tspi21/func1_7ep8.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/tspi21/func1_7ep8.htm'" tppabs="http://msdn.microsoft.com/library/psdk/tspi21/func1_7ep8.htm"><B>TSPI_lineDial</B></A> is able to deal with multiple addresses at once (as for inverse multiplexing). </DD>

<DT>LINEDEVCAPFLAGS_PRIVATEOBJECTS</DT>

<DD>Indicates whether <A HREF="javascript:if(confirm('http://msdn.microsoft.com/library/psdk/tapi3/callover_6377.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/tapi3/callover_6377.htm'" tppabs="http://msdn.microsoft.com/library/psdk/tapi3/callover_6377.htm">provider-specific Interfaces</A> have been implemented. This flag is exposed only to applications that negotiate a TAPI version of 3.0 or higher.
</DD>
</DL>

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

<H4>See Also</H4>

<P><A HREF="func1_2zhh.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_2zhh.htm"><B>lineClose</B></A>, <A HREF="func1_0p0s.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_0p0s.htm"><B>lineDial</B></A>, <A HREF="func1_7mgc.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_7mgc.htm"><B>lineMakeCall</B></A>, <A HREF="func2_69mb.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_69mb.htm"><B>lineTranslateAddress</B></A> </P>
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