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<registry xmlns="http://www.iana.org/assignments" id="iax-parameters">
  <title>Inter-Asterisk eXchange (IAX) Parameters</title>
  <created>2008-12-03</created>
  <updated>2011-12-07</updated>
  <registry id="iax-parameters-1">
    <title>IAX Meta Commands</title>
    <xref type="rfc" data="rfc5457"/>
    <registration_rule>Expert Review</registration_rule>
    <expert>Cullen Jennings</expert>
    <record>
      <value>0x01</value>
      <type>Trunk Meta Frame</type>
      <description>Indicates that frame is a trunk meta frame.</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x02</value>
      <type>T.38 Primary IFP frame</type>
      <description/>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x03-0x7F</value>
      <type>Unassigned</type>
      <description/>
      </record>
  </registry>
  <registry id="iax-parameters-2">
    <title>IAX Frame Types</title>
    <xref type="rfc" data="rfc5457"/>
    <registration_rule>Expert Review</registration_rule>
    <expert>Cullen Jennings</expert>
    <record>
      <value>0x01</value>
      <description>DTMF</description>
      <subclass>0-9, A-D, *, #</subclass>
      <data>Undefined</data>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x02</value>
      <description>Voice</description>
      <subclass>Audio Compression Format</subclass>
      <data>Data</data>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x03</value>
      <description>Video</description>
      <subclass>Video Compression Format</subclass>
      <data>Data</data>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x04</value>
      <description>Control</description>
      <subclass>See Control Frame Subclass</subclass>
      <data>Varies with subclass</data>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x05</value>
      <description>Null</description>
      <subclass>Undefined</subclass>
      <data>Undefined</data>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x06</value>
      <description>IAX Control</description>
      <subclass>See IAX Protocol Messages</subclass>
      <data>Information Elements</data>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x07</value>
      <description>Text</description>
      <subclass>Always 0</subclass>
      <data>Raw Text</data>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x08</value>
      <description>Image</description>
      <subclass>Image Compression Format</subclass>
      <data>Raw Image</data>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x09</value>
      <description>HTML</description>
      <subclass>See HTML Frame Types</subclass>
      <data>Message Specific</data>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0A</value>
      <description>Comfort Noise</description>
      <subclass>Level in -dBov of comfort noise</subclass>
      <data>None</data>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0B</value>
      <description>T.38 Primary IFP frame</description>
      <subclass>No subclasses necessary or allowed</subclass>
      <data/>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x0C-0xFF</value>
      <description>Unassigned</description>
      <subclass/>
      <data/>
    </record>
  </registry>
  <registry id="iax-parameters-3">
    <title>IAX Control Frame Subclass</title>
    <xref type="rfc" data="rfc5457"/>
    <registration_rule>Expert Review</registration_rule>
    <expert>Cullen Jennings</expert>
    <record>
      <value>0x01</value>      
      <type>Hangup</type>
      <description>The call has been hungup at the remote end</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x02</value>      
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x03</value>      
      <type>Ringing</type>
      <description>Remote end is ringing (ring-back)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x04</value>      
      <type>Answer</type>
      <description>Remote end has answered</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x05</value>      
      <type>Busy</type>
      <description>Remote end is busy</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x06</value>      
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x07</value>      
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x08</value>      
      <type>Congestion</type>
      <description>The call is congested</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x09</value>      
      <type>Flash Hook</type>
      <description>Flash hook</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0A</value>      
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0B</value>      
      <type>Option</type>
      <description>Device-specific options are being transmitted</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0C</value>      
      <type>Key Radio</type>
      <description>Key Radio</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0D</value>      
      <type>Unkey Radio</type>
      <description>Unkey Radio</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0E</value>      
      <type>Call Progress</type>
      <description>Call is in progress</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0F</value>      
      <type>Call Proceeding</type>
      <description>Call is proceeding</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x10</value>      
      <type>Hold</type>
      <description>Call is placed on hold</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x11</value>      
      <type>Unhold</type>
      <description>Call is taken off hold</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x12-0x7F</value>      
      <type>Unassigned</type>
      <description/>
    </record>
  </registry>
  <registry id="iax-parameters-4">
    <title>IAX Control Frames</title>
    <xref type="rfc" data="rfc5457"/>
    <registration_rule>Expert Review</registration_rule>
    <expert>Cullen Jennings</expert>
    <record>
      <value>0x01</value>
      <type>NEW</type>
      <description>Initiate a new call</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x02</value>
      <type>PING</type>
      <description>Ping request</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x03</value>
      <type>PONG</type>
      <description>Ping or poke reply</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x04</value>
      <type>ACK</type>
      <description>Explicit acknowledgment</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x05</value>
      <type>HANGUP</type>
      <description>Initiate call tear-down</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x06</value>
      <type>REJECT</type>
      <description>Reject a call</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x07</value>
      <type>ACCEPT</type>
      <description>Accept a call</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x08</value>
      <type>AUTHREQ</type>
      <description>Authentication request</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x09</value>
      <type>AUTHREP</type>
      <description>Authentication reply</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0A</value>
      <type>INVAL</type>
      <description>Invalid message</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0B</value>
      <type>LAGRQ</type>
      <description>Lag request</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0C</value>
      <type>LAGRP</type>
      <description>Lag reply</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0D</value>
      <type>REGREQ</type>
      <description>Registration request</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0E</value>
      <type>REGAUTH</type>
      <description>Registration authentication</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0F</value>
      <type>REGACK</type>
      <description>Registration acknowledgement</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x10</value>
      <type>REGREJ</type>
      <description>Registration reject</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x11</value>
      <type>REGREL</type>
      <description>Registration release</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x12</value>
      <type>VNAK</type>
      <description>Video/Voice retransmit request</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x13</value>
      <type>DPREQ</type>
      <description>Dialplan request</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x14</value>
      <type>DPREP</type>
      <description>Dialplan reply</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x15</value>
      <type>DIAL</type>
      <description>Dial</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x16</value>
      <type>TXREQ</type>
      <description>Transfer request</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x17</value>
      <type>TXCNT</type>
      <description>Transfer connect</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x18</value>
      <type>TXACC</type>
      <description>Transfer accept</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x19</value>
      <type>TXREADY</type>
      <description>Transfer ready</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x1A</value>
      <type>TXREL</type>
      <description>Transfer release</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x1B</value>
      <type>TXREJ</type>
      <description>Transfer reject</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x1C</value>
      <type>QUELCH</type>
      <description>Halt audio/video [media] transmission</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x1D</value>
      <type>UNQUELCH</type>
      <description>Resume audio/video [media] transmission</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x1E</value>
      <type>POKE</type>
      <description>Poke request</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x1F</value>
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x20</value>
      <type>MWI</type>
      <description>Message waiting indication</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x21</value>
      <type>UNSUPPORT</type>
      <description>Unsupported message</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x22</value>
      <type>TRANSFER</type>
      <description>Remote transfer request</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x23</value>
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x24</value>
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x25</value>
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x26</value>
      <type>TXMEDIA</type>
      <description>request a media-only transfer</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x27</value>
      <type>RTKEY</type>
      <description>initiate an encryption key rotation sequence</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x28</value>
      <type>CALLTOKEN</type>
      <description>provide a call token used for 3-way handshake during call setup</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x29-0x2F</value>
      <type>Unassigned</type>
      <description/>
    </record>
    <record>
      <value>0x30</value>
      <type>T38_REQUEST_NEGOTIATE</type>
      <description>T38_REQUEST_NEGOTIATE</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x31</value>
      <type>T38_REQUEST_TERMINATE</type>
      <description>T38_REQUEST_TERMINATE</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x32</value>
      <type>T38_NEGOTIATED</type>
      <description>T38_NEGOTIATED</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x33</value>
      <type>T38_TERMINATED</type>
      <description>T38_TERMINATED</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x34</value>
      <type>T38_REFUSED</type>
      <description>T38_REFUSED</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x35-0x7F</value>
      <type>Unassigned</type>
      <description/>
    </record>
  </registry>
  <registry id="iax-parameters-5">
    <title>IAX HTML Command Subclasses</title>
    <xref type="rfc" data="rfc5457"/>
    <registration_rule>Expert Review</registration_rule>
    <expert>Cullen Jennings</expert>
    <record>
      <value>0x01</value>
      <description>Sending a URL</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x02</value>
      <description>Data frame</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x03</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x04</value>
      <description>Beginning frame</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x05-0x07</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x08</value>
      <description>End frame</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x09-0x0F</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x10</value>
      <description>Load is complete</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x11</value>
      <description>Peer does not support HTML</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x12</value>
      <description>Link URL</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x13</value>
      <description>Unlink URL</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x14</value>
      <description>Reject Link URL</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x15-0x7F</value>
      <description>Unassigned</description>
    </record>
  </registry>
  <registry id="iax-parameters-6">
    <title>IAX Information Elements</title>
    <xref type="rfc" data="rfc5457"/>
    <registration_rule>Expert Review</registration_rule>
    <expert>Cullen Jennings</expert>
    <record>
      <value>0x01</value>
      <type>CALLED NUMBER</type>
      <description>Number/extension being called</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x02</value>
      <type>CALLING NUMBER</type>
      <description>Calling number</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x03</value>
      <type>CALLING ANI</type>
      <description>Calling number ANI for billing</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x04</value>
      <type>CALLING NAME</type>
      <description>Name of caller</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x05</value>
      <type>CALLED CONTEXT</type>
      <description>Context for number</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x06</value>
      <type>USERNAME</type>
      <description>Username (peer or user) for authentication</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x07</value>
      <type>PASSWORD</type>
      <description>Password for authentication</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x08</value>
      <type>CAPABILITY</type>
      <description>Actual CODEC capability</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x09</value>
      <type>FORMAT</type>
      <description>Desired CODEC format</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0A</value>
      <type>LANGUAGE</type>
      <description>Desired language</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0B</value>
      <type>VERSION</type>
      <description>Protocol version</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0C</value>
      <type>ADSICPE</type>
      <description>CPE ADSI capability</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0D</value>
      <type>DNID</type>
      <description>Originally dialed DNID</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0E</value>
      <type>AUTHMETHODS</type>
      <description>Authentication method(s)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0F</value>
      <type>CHALLENGE</type>
      <description>Challenge data for MD5/RSA</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x10</value>
      <type>MD5 RESULT</type>
      <description>MD5 challenge result</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x11</value>
      <type>RSA RESULT</type>
      <description>RSA challenge result</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x12</value>
      <type>APPARENT ADDR</type>
      <description>Apparent address of peer</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x13</value>
      <type>REFRESH</type>
      <description>When to refresh registration</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x14</value>
      <type>DPSTATUS</type>
      <description>Dialplan status</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x15</value>
      <type>CALLNO</type>
      <description>Call number of peer</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x16</value>
      <type>CAUSE</type>
      <description>Cause</description>
      <xref type="rfc" data="rfc5457"/>
    </record> 
    <record>
      <value>0x17</value>
      <type>IAX UNKNOWN</type>
      <description>Unknown IAX command</description>
      <xref type="rfc" data="rfc5457"/>
    </record> 
    <record>
      <value>0x18</value>
      <type>MSGCOUNT</type>
      <description>How many messages waiting</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x19</value>
      <type>AUTOANSWER</type>
      <description>Request auto-answering</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x1A</value>
      <type>MUSICONHOLD</type>
      <description>Request musiconhold with QUELCH</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x1B</value>
      <type>TRANSFERID</type>
      <description>Transfer Request Identifier</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x1C</value>
      <type>RDNIS</type>
      <description>Referring DNIS</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x1D</value>
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x1E</value>
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x1F</value>
      <type>DATETIME</type>
      <description>Date/Time</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x20</value>
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x21</value>
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x22</value>
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x23</value>
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x24</value>
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x25</value>
      <type>Reserved</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x26</value>
      <type>CALLINGPRES</type>
      <description>Calling presentation</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x27</value>
      <type>CALLINGTON</type>
      <description>Calling type of number</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x28</value>
      <type>CALLINGTNS</type>
      <description>Calling transit network select</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x29</value>
      <type>SAMPLINGRATE</type>
      <description>Supported sampling rates</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x2A</value>
      <type>CAUSECODE</type>
      <description>Hangup cause</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x2B</value>
      <type>ENCRYPTION</type>
      <description>Encryption format</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x2C</value>
      <type>ENCKEY</type>
      <description>Reserved for future use</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x2D</value>
      <type>CODEC PREFS</type>
      <description>CODEC Negotiation</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x2E</value>
      <type>RR JITTER</type>
      <description>Received jitter, as in [RFC3550]</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x2F</value>
      <type>RR LOSS</type>
      <description>Received loss, as in [RFC3550]</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x30</value>
      <type>RR PKTS</type>
      <description>Received frames</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x31</value>
      <type>RR DELAY</type>
      <description>Max playout delay for received frames in ms</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x32</value>
      <type>RR DROPPED</type>
      <description>Dropped frames (presumably by jitter buffer)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x33</value>
      <type>RR OOO</type>
      <description>Frames received Out of Order</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x34</value>
      <type>VARIABLE</type>
      <description>used to transport variable names and values between endpoints</description>
      <xref type="person" data="Kevin_P._Fleming"/>
      <xref type="rfc-errata" data="2871"/>
    </record>
    <record>
      <value>0x35</value>
      <type>OSPTOKEN</type>
      <description>OSP Token Block</description>
      <xref type="rfc" data="rfc5457"/>
      <xref type="rfc-errata" data="2871"/>
    </record>
    <record>
      <value>0x36</value>
      <type>CALLTOKEN</type>
      <description>used with the CALLTOKEN IAX control frame</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x37</value>
      <type>CAPABILITY2</type>
      <description>used for expanded codec negotiation</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x38</value>
      <type>FORMAT2</type>
      <description>used for expanded codec negotiation</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x39-0x3F</value>
      <type>Unassigned</type>
      <description/>
    </record>
    <record>
      <value>0x40</value>
      <type>T38_VERSION</type>
      <description>T38_VERSION</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x41</value>
      <type>T38_MAX_IFP</type>
      <description>T38_MAX_IFP</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x42</value>
      <type>T38_MAX_RATE</type>
      <description>T38_MAX_RATE</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x43</value>
      <type>T38_RATE_MANAGEMENT</type>
      <description>T38_RATE_MANAGEMENT</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x44</value>
      <type>T38_FILL_BIT_REMOVAL</type>
      <description>T38_FILL_BIT_REMOVAL</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x45</value>
      <type>T38_MMR_TRANSCODING</type>
      <description>T38_MMR_TRANSCODING</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x46</value>
      <type>T38_JBIG_TRANSCODING</type>
      <description>T38_JBIG_TRANSCODING</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
    <record>
      <value>0x47-0xFF</value>
      <type>Unassigned</type>
      <description/>
    </record>
  </registry>
  <registry id="iax-parameters-7">
    <title>IAX Authentication Methods</title>
    <xref type="rfc" data="rfc5457"/>
    <registration_rule>Expert Review</registration_rule>
    <expert>Cullen Jennings</expert>
    <note>values must be power of two</note>
    <record>
      <value>0x0001</value>
      <description>Reserved (was Plaintext)</description>
      <xref type="rfc" data="rfc5457"/>   
    </record>
    <record>
      <value>0x0002</value>
      <description>MD5</description>
      <xref type="rfc" data="rfc5457"/>   
    </record>
    <record>
      <value>0x0003</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x0004</value>
      <description>RSA</description>
      <xref type="rfc" data="rfc5457"/>   
    </record>
    <record>
      <value>0x0004-0xFFFF</value>
      <description>Unassigned</description>   
    </record>
  </registry>
  <registry id="iax-parameters-8">
    <title>IAX Dialplan Status Flags</title>
    <xref type="rfc" data="rfc5457"/>
    <note>values must be power of two</note>
    <registration_rule>Expert Review</registration_rule>
    <expert>Cullen Jennings</expert>
    <record>
      <value>0x0001</value>
      <description>Exists</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0002</value>
      <description>Can exist</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0003</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x0004</value>
      <description>Non-existent</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0005-0x3FFF</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x4000</value>
      <description>Retain dialtone (ignorepat)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x4001-0x7FFF</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x8000</value>
      <description>More digits may match number</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x8001-0xFFFF</value>
      <description>Unassigned</description>
    </record>
  </registry>
  <registry id="iax-parameters-9">
    <title>IAX Calling Presentation</title>
    <xref type="rfc" data="rfc5457"/>
    <registration_rule>Expert Review</registration_rule>
    <expert>Cullen Jennings</expert>
    <record>
      <value>0x00</value>
      <description>Allowed user/number not screened</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x01</value>
      <description>Allowed user/number passed screen</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x02</value>
      <description>Allowed user/number failed screen</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x03</value>
      <description>Allowed network number</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x04-0x1A</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x020</value>
      <description>Prohibited user/number not screened</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x021</value>
      <description>Prohibited user/number passed screen</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x022</value>
      <description>Prohibited user/number failed screen</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x023</value>
      <description>Prohibited network number</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x24-0x42</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x043</value>
      <description>Number not available</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x44-0xFF</value>
      <description>Unassigned</description>
    </record>
  </registry>
  <registry id="iax-parameters-10">
    <title>IAX Calling Type of Number</title>
    <xref type="rfc" data="rfc5457"/>
    <registration_rule>Expert Review</registration_rule>
    <expert>Cullen Jennings</expert>
    <record>
      <value>0x00</value>
      <description>Unknown</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x01-0x0F</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x10</value>
      <description>International Number</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x11-0x1F</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x20</value>
      <description>National Number</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x21-0x2F</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x30</value>
      <description>Network Specific Number</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x31-0x3F</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x40</value>
      <description>Subscriber Number</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x41-0x5F</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x60</value>
      <description>Abbreviated Number</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x61-0x6F</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x70</value>
      <description>Reserved for extension</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x71-0xFF</value>
      <description>Unassigned</description>
    </record>
  </registry>
  <registry id="iax-parameters-11">
    <title>IAX Transit Network Identification Plan</title>
    <xref type="rfc" data="rfc5457"/>
    <registration_rule>Expert Review</registration_rule>
    <record>
      <value>0000</value>
      <description>Unknown</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0001</value>
      <description>Caller Identification Code</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0010</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0011</value>
      <description>Data Network Identification Code</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0100-1111</value>
      <description>Unassigned</description>
    </record>
  </registry>
  <registry id="iax-parameters-12">
    <title>IAX Type of Network</title>
    <xref type="rfc" data="rfc5457"/>
    <registration_rule>Expert Review</registration_rule>
    <expert>Cullen Jennings</expert>
    <record>
      <value>000</value>
      <description>User Specified</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>001</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>010</value>
      <description>National Network Identification</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>011</value>
      <description>International Network Identification</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>100-111</value>
      <description>Unassigned</description>
    </record>
  </registry>
  <registry id="iax-parameters-13">
    <title>IAX Cause Codes</title>
    <xref type="rfc" data="rfc5457"/>
    <registration_rule>Expert Review</registration_rule>
    <expert>Cullen Jennings</expert>
    <record>
      <value>1</value>
      <description>Unassigned/unallocated number</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>2</value>
      <description>No route to specified transit network</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>3</value>
      <description>No route to specified transit network</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>4-5</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>6</value>
      <description>Channel unacceptable</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>7</value>
      <description>Call awarded and delivered</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>8-15</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>16</value>
      <description>Normal call clearing</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>17</value>
      <description>User busy</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>18</value>
      <description>No user response</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>19</value>
      <description>No answer</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>20</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>21</value>
      <description>Call rejected</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>22</value>
      <description>Number changed</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>23-26</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>27</value>
      <description>Destination out of order</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>28</value>
      <description>Invalid number format/incomplete number</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>29</value>
      <description>Facility rejected</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>30</value>
      <description>Response to status enquiry</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>31</value>
      <description>Normal, unspecified</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>32-33</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>34</value>
      <description>No circuit/channel available</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>35-37</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>38</value>
      <description>Network out of order</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>39-40</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>41</value>
      <description>Temporary failure</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>42</value>
      <description>Switch congestion</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>43</value>
      <description>Access information discarded</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>44</value>
      <description>Requested channel not available</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>45</value>
      <description>Pre-empted (causes.h only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>46</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>47</value>
      <description>Resource unavailable, unspecified (Q.931 only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>48-49</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>50</value>
      <description>Facility not subscribed (causes.h only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>51</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>52</value>
      <description>Outgoing call barred (causes.h only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>53</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>54</value>
      <description>Incoming call barred (causes.h only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>55-56</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>57</value>
      <description>Bearer capability not authorized</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>58</value>
      <description>Bearer capability not available</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>59-62</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>63</value>
      <description>Service or option not available (Q.931 only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>64</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>65</value>
      <description>Bearer capability not implemented</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>66</value>
      <description>Channel type not implemented</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>67-68</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>69</value>
      <description>Facility not implemented</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>70</value>
      <description>Only restricted digital information bearer capability is available (Q.931 only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>71-78</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>79</value>
      <description>Service or option not available (Q.931 only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>80</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>81</value>
      <description>Invalid call reference</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>82</value>
      <description>Identified channel does not exist (Q.931 only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>83</value>
      <description>A suspended call exists, but this call identity does not (Q.931 only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>84</value>
      <description>Call identity in use (Q.931 only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>85</value>
      <description>No call suspended (Q.931 only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>86</value>
      <description>Call has been cleared (Q.931 only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>87</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>88</value>
      <description>Incompatible destination</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>89-90</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>91</value>
      <description>Invalid transit network selection (Q.931 only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>92-94</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>95</value>
      <description>Invalid message, unspecified</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>96</value>
      <description>Mandatory information element missing (Q.931 only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>97</value>
      <description>Message type nonexistent/not implemented</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>98</value>
      <description>Message not compatible with call state</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>99</value>
      <description>Information element nonexistent</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>100</value>
      <description>Invalid information element contents</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>101</value>
      <description>Message not compatible with call state</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>102</value>
      <description>Recovery on timer expiration</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>103</value>
      <description>Mandatory information element length error (causes.h only)</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>104-110</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>111</value>
      <description>Protocol error, unspecified</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>112-126</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>127</value>
      <description>Internetworking, unspecified</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>128-255</value>
      <description>Unassigned</description>
    </record>
  </registry>
  <registry id="iax-parameters-14">
    <title>IAX Encryption Methods</title>
    <xref type="rfc" data="rfc5457"/>
    <registration_rule>Expert Review</registration_rule>
    <expert>Cullen Jennings</expert>
    <note>values must be power of two</note>
    <record>
      <value>0x0001</value>
      <description>AES-128</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x0002-0x7FFF</value>
      <description>Unassigned</description>
    </record>
    <record>
      <value>0x8000</value>
      <description>KEYROTATE - indicates that encryption key rotation is available/will be used</description>
      <xref type="person" data="Kevin_P._Fleming"/>
    </record>
  </registry>
  <registry id="iax-parameters-15">
    <title>IAX Media Formats</title>
    <xref type="rfc" data="rfc5457"/>
    <registration_rule>Expert Review</registration_rule>
    <expert>Cullen Jennings</expert>
    <note>values must be power of two</note>
    <record>
      <value>0x00000001</value>
      <description>G.723.1</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00000002</value>
      <description>GSM Full Rate</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00000004</value>
      <description>G.711 mu-law</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00000008</value>
      <description>G.711 a-law</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00000010</value>
      <description>G.726</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00000020</value>
      <description>IMA ADPCM</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00000040</value>
      <description>16-bit linear little-endian</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00000080</value>
      <description>LPC10</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00000100</value>
      <description>G.729</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00000200</value>
      <description>Speex</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00000400</value>
      <description>ILBC</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00000800</value>
      <description>G.726 AAL2</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00001000</value>
      <description>G.722</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00002000</value>
      <description>AMR</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00010000</value>
      <description>JPEG</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00020000</value>
      <description>PNG</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00040000</value>
      <description>H.261</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00080000</value>
      <description>H.263</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00100000</value>
      <description>H.263p</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
    <record>
      <value>0x00200000</value>
      <description>H.264</description>
      <xref type="rfc" data="rfc5457"/>
    </record>
  </registry>

  <people>
    <person id="Kevin_P._Fleming">
      <name>Kevin P. Fleming</name>
      <uri>mailto:kpfleming&amp;digium.com</uri>
      <updated>2009-07-12</updated>
    </person>
  </people>
</registry>
