<div class="content" name="SetMediaMode" uuid="f069bc1d-3d63-4b0f-84b9-caa5467a6d83"><p>The SetMediaMode packet is transmitted from a TAPI <a href="489de77f-16d8-4c4f-939a-f795e8b42893#gt_60e0e1fa-66fe-41e1-b5e3-ceab97e53506" data-linktype="relative-path">client</a> to a TAPI <a href="489de77f-16d8-4c4f-939a-f795e8b42893#gt_434b0234-e970-4e8c-bdfa-e16a30d96703" data-linktype="relative-path">server</a> in a <a href="489de77f-16d8-4c4f-939a-f795e8b42893#gt_8a7f6700-8311-45bc-af10-82e10accd331" data-linktype="relative-path">remote procedure call</a>.
Sending this packet MUST set the media types of the specified call in its <a href="6ff3773f-0fad-451c-bef4-5e225626f9aa" data-linktype="relative-path">LINECALLINFO</a> packet.</p><table>
 <tbody><tr>
  <th><p><br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>1<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>2<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>3<br/>0</p></th>
  <th><p><br/>1</p></th>
 </tr>
 <tr>
  <td colspan="32">Req_Func</td>
 </tr>
 <tr>
  <td colspan="32">Reserved1</td>
 </tr>
 <tr>
  <td colspan="32">hCall</td>
 </tr>
 <tr>
  <td colspan="32">dwMediaMode</td>
 </tr>
 <tr>
  <td colspan="32">Reserved2</td>
 </tr>
 <tr>
  <td colspan="32">Reserved3</td>
 </tr>
 <tr>
  <td colspan="32">Reserved4</td>
 </tr>
 <tr>
  <td colspan="32">Reserved5</td>
 </tr>
 <tr>
  <td colspan="32">Reserved6</td>
 </tr>
 <tr>
  <td colspan="32">Reserved7</td>
 </tr>
 <tr>
  <td colspan="32">Reserved8</td>
 </tr>
 <tr>
  <td colspan="32">Reserved9</td>
 </tr>
 <tr>
  <td colspan="32">Reserved10</td>
 </tr>
 <tr>
  <td colspan="32">Reserved11</td>
 </tr>
 <tr>
  <td colspan="32">Reserved12</td>
 </tr>
</tbody></table><p><b>Req_Func (4 bytes): </b>The identifier of the
function that will be invoked on the remote server. This value MUST be set to
80.</p><dl>
<dd>
<p><b>Return Values</b></p>
</dd>
<dd>
<p>On completion of <a href="c28c36d0-579b-4e20-a100-f4e71012d5f8" data-linktype="relative-path">ClientRequest</a>, this field
MUST contain the result of the encapsulated telephony request. A value of 0
indicates success, and a <a href="e0e8af90-24f1-4dbc-8d4e-01b8e4e7cb53" data-linktype="relative-path">LINEERR_Constants</a>
value indicates failure. The remote server MUST complete this call
synchronously.</p>
</dd>
<dd>
<p>Returns zero if the request succeeds or a negative
error number if an error occurs. Common return values are:</p>
</dd>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Name</p>
   </th>
   <th>
   <p>Value</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>LINEERR_INVALCALLHANDLE</td>
  <td>0x80000018</td>
 </tr><tr>
  <td>LINEERR_OPERATIONFAILED</td>
  <td>0x80000048</td>
 </tr><tr>
  <td>LINEERR_INVALMEDIAMODE</td>
  <td>0x8000002F</td>
 </tr><tr>
  <td>LINEERR_RESOURCEUNAVAIL</td>
  <td>0x8000004B</td>
 </tr><tr>
  <td>LINEERR_NOMEM</td>
  <td>0x80000044</td>
 </tr><tr>
  <td>LINEERR_UNINITIALIZED</td>
  <td>0x80000050</td>
 </tr><tr>
  <td>LINEERR_OPERATIONUNAVAIL</td>
  <td>0x80000049</td>
 </tr></tbody></table>
</dd></dl><p><b>Reserved1 (4 bytes): </b>An unsigned 32-bit
integer. MUST be set to zero when sent and MUST be ignored on receipt. </p><p><b>hCall (4 bytes): </b>An <a href="7f4089a0-7432-4ef0-8eeb-5aafe407c07e" data-linktype="relative-path">HCALL</a>. The handle to the
call whose media type is to be changed. One way of obtaining a valid hCall is
by sending the <a href="c9acdfde-22de-43ff-b491-23a9ed72fb31" data-linktype="relative-path">MakeCall</a>
packet. Also a valid hCall can be obtained from <a href="0a8905e3-647f-4e98-aca8-2fa77eedb2e7" data-linktype="relative-path">LINE_CALLSTATE</a> packet sent
by the remote server. The application MUST be an owner of the call. The call
state of hCall can be any state. </p><p><b>dwMediaMode (4 bytes): </b>An unsigned 32-bit
integer. The new media types for the call. This parameter MUST use the <a href="e3b2104f-131d-4ead-9ded-45654ebfeac0" data-linktype="relative-path">LINEMEDIAMODE_Constants</a>.
If the UNKNOWN media type flag is set, other media type flags can also be set.
This field MUST be used to identify the media type of a call when the media
type is not fully determined, but is narrowed down to one of a small set of
specified media types. If the UNKNOWN flag is not set, only a single media type
can be specified.</p><p><b>Reserved2 (4 bytes): </b>An unsigned 32-bit
integer. This field is used for padding and MUST be ignored on receipt. It can
be any value.</p><p><b>Reserved3 (4 bytes): </b>An unsigned 32-bit
integer. This field is used for padding and MUST be ignored on receipt. It can
be any value.</p><p><b>Reserved4 (4 bytes): </b>An unsigned 32-bit
integer. This field is used for padding and MUST be ignored on receipt. It can
be any value.</p><p><b>Reserved5 (4 bytes): </b>An unsigned 32-bit
integer. This field is used for padding and MUST be ignored on receipt. It can
be any value.</p><p><b>Reserved6 (4 bytes): </b>An unsigned 32-bit
integer. This field is used for padding and MUST be ignored on receipt. It can
be any value.</p><p><b>Reserved7 (4 bytes): </b>An unsigned 32-bit
integer. This field is used for padding and MUST be ignored on receipt. It can
be any value.</p><p><b>Reserved8 (4 bytes): </b>An unsigned 32-bit
integer. This field is used for padding and MUST be ignored on receipt. It can
be any value.</p><p><b>Reserved9 (4 bytes): </b>An unsigned 32-bit
integer. This field is used for padding and MUST be ignored on receipt. It can
be any value.</p><p><b>Reserved10 (4 bytes): </b>An unsigned 32-bit
integer. This field is used for padding and MUST be ignored on receipt. It can
be any value.</p><p><b>Reserved11 (4 bytes): </b>An unsigned 32-bit
integer. This field is used for padding and MUST be ignored on receipt. It can
be any value.</p><p><b>Reserved12 (4 bytes): </b>An unsigned 32-bit
integer. This field is used for padding and MUST be ignored on receipt. It can
be any value.</p></div>