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<TITLE>Supplementary Line Service Functions</TITLE>
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<H4><A NAME="_tapi2_supplementary_line_service_functions"></A>Supplementary Line Service Functions</H4>
<P>The supplementary line service functions are listed by category in the following topics. A function is identified as <I>asynchronous</I> if it will indicate completion in a REPLY message to the application. If the function always returns its result to the application immediately, the function is considered <I>synchronous</I>. </P>
<P>Following is a functional grouping of the supplementary line service functions:</P>
<P><A HREF="#_tapi2_agents_qref">Agents</A></P>
<P><A HREF="#_tapi2_application_priority_qref">Application priority</A></P>
<P><A HREF="#_tapi2_bearer_mode_and_rate_qref">Bearer mode and rate</A></P>
<P><A HREF="#_tapi2_call_accept_and_redirect_qref">Call accept and redirect</A></P>
<P><A HREF="#_tapi2_call_completion_qref">Call completion</A></P>
<P><A HREF="#_tapi2_call_conference_qref">Call conference</A></P>
<P><A HREF="#_tapi2_call_forwarding_qref">Call forwarding</A></P>
<P><A HREF="#_tapi2_call_hold_qref">Call hold</A></P>
<P><A HREF="#_tapi2_call_park_qref">Call park</A></P>
<P><A HREF="#_tapi2_call_pickup_qref">Call pickup</A></P>
<P><A HREF="#_tapi2_call_reject_qref">Call reject</A></P>
<P><A HREF="#_tapi2_call_transfer_qref">Call transfer</A></P>
<P><A HREF="#_tapi2_digit_monitoring_and_gathering_qref">Digit monitoring and gathering</A></P>
<P><A HREF="#_tapi2_generating_inband_digits_and_tones_qref">Generating inband digits and tones</A></P>
<P><A HREF="quickref_1pnp.htm#_tapi2_making_calls_qref" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/quickref_1pnp.htm#_tapi2_making_calls_qref">Making calls</A></P>
<P><A HREF="#_tapi2_media_control_qref">Media control</A></P>
<P><A HREF="#_tapi2_media_monitoring_qref">Media monitoring</A></P>
<P><A HREF="#_tapi2_proxies_qref">Proxies</A></P>
<P><A HREF="#_tapi2_quality_of_service_qref">Quality of Service</A></P>
<P><A HREF="#_tapi2_sending_information_to_remote_party_qref">Sending information to remote party</A></P>
<P><A HREF="#_tapi2_service_provider_management_qref">Service provider management</A></P>
<P><A HREF="#_tapi2_setting_a_terminal_for_phone_conversations_qref">Setting a terminal for phone conversations</A></P>
<P><A HREF="#_tapi2_tone_monitoring_qref">Tone monitoring</A></P>
<P>and other <A HREF="#_tapi2_miscellaneous_qref">miscellaneous</A> supplementary line service functions.</P>
<H4><A NAME="_tapi2_bearer_mode_and_rate_qref"></A>Bearer Mode and Rate </H4>
<TABLE>
<TR VALIGN="top">
<TD width=44%><A HREF="func2_1sj7.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_1sj7.htm"><B>lineSetCallParams</B></A></TD>
<TD width=56%>Requests a change in the call parameters of an existing call. Synchronous. </TD>
</TR>
</TABLE><BR>
<H4><A NAME="_tapi2_media_monitoring_qref"></A>Media Monitoring </H4>
<TABLE>
<TR VALIGN="top">
<TD width=44%><A HREF="func2_2zkx.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_2zkx.htm"><B>lineMonitorMedia</B></A></TD>
<TD width=56%>Enables or disables media mode notification on a specified call. Synchronous. </TD>
</TR>
</TABLE><BR>
<H4><A NAME="_tapi2_digit_monitoring_and_gathering_qref"></A>Digit Monitoring and Gathering </H4>
<TABLE>
<TR VALIGN="top">
<TD width=44%><A HREF="func2_0e43.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_0e43.htm"><B>lineMonitorDigits</B></A></TD>
<TD width=56%>Enables or disables digit detection notification on a specified call. Synchronous. </TD>
</TR>
<TR VALIGN="top">
<TD width=44%><A HREF="func1_8q9f.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_8q9f.htm"><B>lineGatherDigits</B></A></TD>
<TD width=56%>Performs the buffered gathering of digits on a call. Synchronous. </TD>
</TR>
</TABLE><BR>
<H4><A NAME="_tapi2_tone_monitoring_qref"></A>Tone Monitoring </H4>
<TABLE>
<TR VALIGN="top">
<TD width=44%><A HREF="func2_77eb.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_77eb.htm"><B>lineMonitorTones</B></A></TD>
<TD width=56%>Specifies which tones to detect on a specified call. Synchronous. </TD>
</TR>
</TABLE><BR>
<H4><A NAME="_tapi2_media_control_qref"></A>Media Control </H4>
<TABLE>
<TR VALIGN="top">
<TD width=44%><A HREF="func2_4bzg.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_4bzg.htm"><B>lineSetMediaControl</B></A></TD>
<TD width=56%>Sets up a call's media stream for media control. Synchronous. </TD>
</TR>
<TR VALIGN="top">
<TD width=44%><A HREF="func2_9691.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_9691.htm"><B>lineSetMediaMode</B></A></TD>
<TD width=56%>Sets the media mode(s) of the specified call in its <A HREF="struc1_4oky.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/struc1_4oky.htm"><B>LINECALLINFO</B></A> structure. Synchronous. </TD>
</TR>
</TABLE><BR>
<H4><A NAME="_tapi2_generating_inband_digits_and_tones_qref"></A>Generating Inband Digits and Tones </H4>
<TABLE>
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<TD width=44%><A HREF="func1_8ir7.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_8ir7.htm"><B>lineGenerateDigits</B></A></TD>
<TD width=56%>Generates inband digits on a call. Synchronous. </TD>
</TR>
<TR VALIGN="top">
<TD width=44%><A HREF="func1_23xh.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_23xh.htm"><B>lineGenerateTone</B></A></TD>
<TD width=56%>Generates a given set of tones inband on a call. Synchronous. </TD>
</TR>
</TABLE><BR>
<H4><A NAME="_tapi2_call_accept_and_redirect_qref"></A>Call Accept and Redirect </H4>
<TABLE>
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<TD width=45%><A HREF="func1_82r8.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_82r8.htm"><B>lineAccept</B></A></TD>
<TD width=55%>Accepts an offered call and starts alerting both caller (ringback) and called party (ring). Asynchronous. </TD>
</TR>
<TR VALIGN="top">
<TD width=45%><A HREF="func2_0yt0.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_0yt0.htm"><B>lineRedirect</B></A></TD>
<TD width=55%>Redirects an offering call to another address. Asynchronous. </TD>
</TR>
</TABLE><BR>
<H4><A NAME="_tapi2_call_reject_qref"></A>Call Reject </H4>
<TABLE>
<TR VALIGN="top">
<TD width=45%><A HREF="func1_1i5s.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_1i5s.htm"><B>lineDrop</B></A></TD>
<TD width=55%>Disconnects a call, or abandons a call attempt in progress. Asynchronous. </TD>
</TR>
</TABLE><BR>
<H4><A NAME="_tapi2_call_hold_qref"></A>Call Hold </H4>
<TABLE>
<TR VALIGN="top">
<TD width=45%><A HREF="func1_3plw.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_3plw.htm"><B>lineHold</B></A> </TD>
<TD width=55%>Places the specified call on hard hold. Asynchronous. </TD>
</TR>
<TR VALIGN="top">
<TD width=45%><A HREF="func2_2ulg.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_2ulg.htm"><B>lineUnhold</B></A></TD>
<TD width=55%>Retrieves a held call. Asynchronous. </TD>
</TR>
</TABLE><BR>
<H4><A NAME="_tapi2_securing_calls_qref"></A>Securing Calls </H4>
<TABLE>
<TR VALIGN="top">
<TD width=45%><A HREF="func2_52ek.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_52ek.htm"><B>lineSecureCall</B></A> </TD>
<TD width=55%>Secures an existing call from interference by other events such as call-waiting beeps on data connections. Asynchronous. </TD>
</TR>
</TABLE><BR>
<H4><A NAME="_tapi2_call_transfer_qref"></A>Call Transfer </H4>
<TABLE>
<TR VALIGN="top">
<TD width=45%><A HREF="func2_8ofm.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_8ofm.htm"><B>lineSetupTransfer</B></A></TD>
<TD width=55%>Prepares a specified call for transfer to another address. Asynchronous. </TD>
</TR>
<TR VALIGN="top">
<TD width=45%><A HREF="func1_9b1u.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_9b1u.htm"><B>lineCompleteTransfer</B></A> </TD>
<TD width=55%>Transfers a call that was set up for transfer to another call, or enters a three-way conference. Asynchronous. </TD>
</TR>
<TR VALIGN="top">
<TD width=45%><A HREF="func1_36wi.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func1_36wi.htm"><B>lineBlindTransfer</B></A> </TD>
<TD width=55%>Transfers a call to another party. Asynchronous. </TD>
</TR>
<TR VALIGN="top">
<TD width=45%><A HREF="func2_4rxg.htm" tppabs="http://msdn.microsoft.com/library/psdk/tapi22/func2_4rxg.htm"><B>lineSwapHold</B></A></TD>
<TD width=55%>Swaps the active call with the call currently on consultation hold. Asynchronous. </TD>
</TR>
</TABLE><BR>
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