tech-invite   World Map     

IETF     RFCs     Groups     SIP     ABNFs    |    3GPP     Specs     Gloss.     Arch.     IMS     UICC    |    Misc.    |    search     info

RFC 6231

 
 
 

An Interactive Voice Response (IVR) Control Package for the Media Control Channel Framework

Part 4 of 6, p. 61 to 79
Prev RFC Part       Next RFC Part

 


prevText      Top      Up      ToC       Page 61 
4.4.  Audit Elements

   The audit elements defined in this section allow the MS to be audited
   for package capabilities as well as dialogs managed by the package.
   Auditing is particularly important for two use cases.  First, it
   enables discovery of package capabilities supported on an MS before
   an AS starts a dialog on connection or conference.  The AS can then
   use this information to create request elements using supported
   capabilities and, in the case of codecs, to negotiate an appropriate
   SDP for a User Agent's connection.  Second, auditing enables
   discovery of the existence and status of dialogs currently managed by
   the package on the MS.  This could be used when one AS takes over
   management of the dialogs if the AS that initiated the dialogs fails
   or is no longer available (see Security Considerations described in
   Section 7).

4.4.1.  <audit>

   The <audit> request element is sent to the MS to request information
   about the capabilities of, and dialogs currently managed with, this
   Control Package.  Capabilities include supported dialog languages,
   grammar formats, record and media types, as well as codecs.  Dialog
   information includes the status of managed dialogs as well as codecs.

   The <audit> element has the following attributes:

Top      Up      ToC       Page 62 
   capabilities:  indicates whether package capabilities are to be
      audited.  A valid value is a boolean (see Section 4.6.1).  A value
      of true indicates that capability information is to be reported.
      A value of false indicates that capability information is not to
      be reported.  The attribute is optional.  The default value is
      true.

   dialogs:  indicates whether dialogs currently managed by the package
      are to be audited.  A valid value is a boolean (see
      Section 4.6.1).  A value of true indicates that dialog information
      is to be reported.  A value of false indicates that dialog
      information is not to be reported.  The attribute is optional.
      The default value is true.

   dialogid:  string identifying a specific dialog to audit.  The MS
      sends a response with a 406 status code (Section 4.5) if the
      specified dialog identifier is invalid.  The attribute is
      optional.  There is no default value.

   If the dialogs attribute has the value true and dialogid attribute is
   specified, then only audit information about the specified dialog is
   reported.  If the dialogs attribute has the value false, then no
   dialog audit information is reported even if a dialogid attribute is
   specified.

   The <audit> element has no child elements.

   When the MS receives an <audit> request, it MUST reply with an
   <auditresponse> element (Section 4.4.2), which includes a mandatory
   attribute describing the status in terms of a numeric code.  Response
   status codes are defined in Section 4.5.  If the request is
   successful, the <auditresponse> contains (depending on attribute
   values) a <capabilities> element (Section 4.4.2.2) reporting package
   capabilities and a <dialogs> element (Section 4.4.2.3) reporting
   managed dialog information.  If the MS is not able to process the
   request and carry out the audit operation, the audit request has
   failed and the MS MUST indicate the class of failure using an
   appropriate 4xx response code.  Unless an error response code is
   specified for a class of error within this section, implementations
   follow Section 4.5 in determining the appropriate status code for the
   response.

   For example, a request to audit capabilities and dialogs managed by
   the package:

   <mscivr version="1.0" xmlns="urn:ietf:params:xml:ns:msc-ivr">
     <audit/>
   </mscivr>

Top      Up      ToC       Page 63 
   In this example, only capabilities are to be audited:

   <mscivr version="1.0" xmlns="urn:ietf:params:xml:ns:msc-ivr">
     <audit dialogs="false"/>
   </mscivr>

   With this example, only a specific dialog is to be audited:

   <mscivr version="1.0" xmlns="urn:ietf:params:xml:ns:msc-ivr">
     <audit capabilities="false" dialogid="d4"/>
   </mscivr>

4.4.2.  <auditresponse>

   The <auditresponse> element describes a response to an <audit>
   request.

   The <auditresponse> element has the following attributes:

   status:  numeric code indicating the audit response status.  The
      attribute is mandatory.  Valid values are defined in Section 4.5.

   reason:  string specifying a reason for the status.  The attribute is
      optional.

   desclang:  specifies the language used in the value of the reason
      attribute.  A valid value is a language identifier
      (Section 4.6.11).  The attribute is optional.  If not specified,
      the value of the desclang attribute on <mscivr> (Section 4.1)
      applies.

   The <auditresponse> element has the following sequence of child
   elements:

   <capabilities>  element (Section 4.4.2.2) describing capabilities of
      the package.  The element is optional.

   <dialogs>  element (Section 4.4.2.3) describing information about
      managed dialogs.  The element is optional.

   For example, a successful response to an <audit> request requesting
   capabilities and dialogs information:

Top      Up      ToC       Page 64 
   <mscivr version="1.0" xmlns="urn:ietf:params:xml:ns:msc-ivr">
    <auditresponse status="200">
     <capabilities>
      <dialoglanguages>
       <mimetype>application/voicexml+xml</mimetype>
      </dialoglanguages>
      <grammartypes/>
      <recordtypes>
       <mimetype>audio/x-wav</mimetype>
       <mimetype>video/3gpp</mimetype>
      </recordtypes>
      <prompttypes>
       <mimetype>audio/x-wav</mimetype>
       <mimetype>video/3gpp</mimetype>
      </prompttypes>
      <variables>
       <variabletype type="date" desc="value formatted as YYYYMMDD">
        <format desc="month year day">mdy</format>
        <format desc="year month day">ymd</format>
        <format desc="day month year">dmy</format>
        <format desc="day month">dm</format>
       </variabletype>
      </variables>
      <maxpreparedduration>600s</maxpreparedduration>
      <maxrecordduration>1800s</maxrecordduration>
      <codecs>
       <codec name="video">
        <subtype>H263</subtype>
       </codec>
       <codec name="video">
        <subtype>H264</subtype>
       </codec>
       <codec name="audio">
        <subtype>PCMU</subtype>
       </codec>
       <codec name="audio">
        <subtype>PCMA</subtype>
       </codec>
       <codec name="audio">
        <subtype>telephone-event</subtype>
       </codec>
      </codecs>
     </capabilities>
     <dialogs>
      <dialogaudit dialogid="4532" state="preparing"/>
      <dialogaudit dialogid="4599" state="prepared"/>
      <dialogaudit dialogid="1234" state="started" conferenceid="conf1">
       <codecs>

Top      Up      ToC       Page 65 
        <codec name="audio">
         <subtype>PCMA</subtype>
        </codec>
        <codec name="audio">
         <subtype>telephone-event</subtype>
        </codec>
       </codecs>
      </dialogaudit>
     </dialogs>
    </auditresponse>
   </mscivr>

4.4.2.1.  <codecs>

   The <codecs> provides audit information about codecs.

   The <codecs> element has no attributes.

   The <codecs> element has the following sequence of child elements (0
   or more occurrences):

   <codec>:  audit information for a codec (Section 4.4.2.1.1).  The
      element is optional.

   For example, a fragment describing two codecs:

   <codecs>
     <codec name="audio">
      <subtype>PCMA</subtype>
     </codec>
     <codec name="audio">
      <subtype>telephone-event</subtype>
     </codec>
   </codecs>

4.4.2.1.1.  <codec>

   The <codec> element describes a codec on the MS.  The element is
   modeled on the <codec> element in the XCON conference information
   data model [XCON-DATA-MODEL] but allows addition information (e.g.,
   rate, speed, etc.) to be specified.

   The <codec> element has the following attributes:

   name:  indicates the type name of the codec's media format as defined
      in [IANA].  A valid value is a "type-name" as defined in Section
      4.2 of [RFC4288].  The attribute is mandatory.

Top      Up      ToC       Page 66 
   The <codec> element has the following sequence of child elements:

   <subtype>:  element whose content model describes the subtype of the
      codec's media format as defined in [IANA].  A valid value is a
      "subtype-name" as defined in Section 4.2 of [RFC4288].  The
      element is mandatory.

   <params>:  element (Section 4.2.6) describing additional information
      about the codec.  This package is agnostic to the names and values
      of the codec parameters supported by an implementation.  The
      element is optional.

   For example, a fragment with a <codec> element describing the H263
   video codec:

   <codec name="video">
    <subtype>H263</subtype>
   </codec>

4.4.2.2.  <capabilities>

   The <capabilities> element provides audit information about package
   capabilities.

   The <capabilities> element has no attributes.

   The <capabilities> element has the following sequence of child
   elements:

   <dialoglanguages>:  element (Section 4.4.2.2.1) describing additional
      dialog languages supported by the MS.  The element is mandatory.

   <grammartypes>:  element (Section 4.4.2.2.2) describing supported
      <grammar> (Section 4.3.1.3.1) format types.  The element is
      mandatory.

   <recordtypes>:  element (Section 4.4.2.2.3) describing <media>
      (Section 4.3.1.5) format types supported for <record>
      (Section 4.3.1.4).  The element is mandatory.

   <prompttypes>:  element (Section 4.4.2.2.4) describing supported
      <media> (Section 4.3.1.5) format types for playback within a
      <prompt> (Section 4.3.1.1).  The element is mandatory.

   <variables>:  element (Section 4.4.2.2.5) describing supported types
      and formats for the <variable> element (Section 4.3.1.1.1).  The
      element is mandatory.

Top      Up      ToC       Page 67 
   <maxpreparedduration>:  element (Section 4.4.2.2.6) describing the
      supported maximum duration for a prepared dialog following a
      <dialogprepare> (Section 4.2.1) request.  The element is
      mandatory.

   <maxrecordduration>:  element (Section 4.4.2.2.7) describing the
      supported maximum duration for a recording <record>
      (Section 4.3.1.4) request.  The element is mandatory.

   <codecs>:  element (Section 4.4.2.1) describing codecs available to
      the package.  The element is mandatory.

   For example, a fragment describing capabilities:

     <capabilities>
      <dialoglanguages>
       <mimetype>application/voicexml+xml</mimetype>
      </dialoglanguages>
      <grammartypes/>
      <recordtypes>
       <mimetype>audio/x-wav</mimetype>
       <mimetype>video/3gpp</mimetype>
      </recordtypes>
      <prompttypes>
       <mimetype>audio/x-wav</mimetype>
       <mimetype>video/3gpp</mimetype>
      </prompttypes>
      <variables/>
      <maxpreparedduration>30s</maxpreparedduration>
      <maxrecordduration>60s</maxrecordduration>
      <codecs>
       <codec name="video">
        <subtype>H263</subtype>
       </codec>
       <codec name="video">
        <subtype>H264</subtype>
       </codec>
       <codec name="audio">
        <subtype>PCMU</subtype>
       </codec>
       <codec name="audio">
        <subtype>PCMA</subtype>
       </codec>
       <codec name="audio">
        <subtype>telephone-event</subtype>
       </codec>
      </codecs>
     </capabilities>

Top      Up      ToC       Page 68 
4.4.2.2.1.  <dialoglanguages>

   The <dialoglanguages> element provides information about additional
   dialog languages supported by the package.  Dialog languages are
   identified by their associated MIME media types.  The MS MUST NOT
   include the mandatory dialog language for this package (Section 4.3).

   The <dialoglanguages> element has no attributes.

   The <dialoglanguages> element has the following sequence of child
   elements (0 or more occurrences):

   <mimetype>:  element whose content model describes a MIME media type
      (Section 4.6.10) associated with a supported dialog language.  The
      element is optional.

4.4.2.2.2.  <grammartypes>

   The <grammartypes> element provides information about <grammar>
   format types supported by the package.  The MS MUST NOT include the
   mandatory SRGS format type, "application/srgs+xml"
   (Section 4.3.1.3.1).

   The <grammartypes> element has no attributes.

   The <grammartypes> element has the following sequence of child
   elements (0 or more occurrences):

   <mimetype>:  element whose content model describes a mime type
      (Section 4.6.10).  The element is optional.

4.4.2.2.3.  <recordtypes>

   The <recordtypes> element provides information about media resource
   format types of <record> supported by the package (Section 4.3.1.4).

   The <recordtypes> element has no attributes.

   The <recordtypes> element has the following sequence of child
   elements (0 or more occurrences):

   <mimetype>:  element whose content model describes a mime type
      (Section 4.6.10).  The element is optional.

4.4.2.2.4.  <prompttypes>

   The <prompttypes> element provides information about media resource
   format types of <prompt> supported by the package (Section 4.3.1.1).

Top      Up      ToC       Page 69 
   The <prompttypes> element has no attributes.

   The <prompttypes> element has the following sequence of child
   elements (0 or more occurrences):

   <mimetype>:  element whose content model describes a mime type
      (Section 4.6.10).  The element is optional.

4.4.2.2.5.  <variables>

   The <variables> element provides information about types and formats
   for the <variable> element (Section 4.3.1.1.1) supported by the
   package.

   The <variables> element has no attributes.

   The <variables> element has the following sequence of child elements
   (0 or more occurrences):

   <variabletype>:  element describing the formats support for a given
      type (Section 4.4.2.2.5.1).  The element is optional.

   For example, a fragment describing support for <variable> with a
   "date" type according to the formats specified in
   Section 4.3.1.1.1.1.

   <variables>
    <variabletype type="date" desc="value formatted as YYYYMMDD">
      <format desc="month year day">mdy</format>
      <format desc="year month day">ymd</format>
      <format desc="day month year">dmy</format>
      <format desc="day month">dm</format>
    </variabletype>
   </variables>

4.4.2.2.5.1.  <variabletype>

   The <variabletype> element describes the formats supported for
   <variable> supported type.

   The <variabletype> element has the following attributes:

   type:  indicates a supported value associated with the type attribute
      of the <variable> element.  The attribute is mandatory.

   desc:  a string providing some textual description of the type and
      format.  The attribute is optional.

Top      Up      ToC       Page 70 
   desclang:  specifies the language used in the value of the desc
      attribute.  A valid value is a language identifier
      (Section 4.6.11).  The attribute is optional.  If not specified,
      the value of the desclang attribute on <mscivr> (Section 4.1)
      applies.

   The <variabletype> element has the following sequence of child
   elements (0 or more occurrences):

   <format>:  element with a desc attribute (optional description),
      desclang (optional language identifier for the description), and a
      content model describing a supported format in the <variable>
      format attribute.  The element is optional.

4.4.2.2.6.  <maxpreparedduration>

   The <maxpreparedduration> element describes the maximum duration for
   a dialog to remain in the prepared state (Section 4.2) following a
   <dialogprepare> (Section 4.2.1) request.

   The <maxpreparedduration> element has no attributes.

   The <maxpreparedduration> element has a content model describing the
   maximum prepared dialog duration as a time designation
   (Section 4.6.7).

4.4.2.2.7.  <maxrecordduration>

   The <maxrecordduration> element describes the maximum recording
   duration for <record> Section 4.3.1.4) request supported by the MS.

   The <maxrecordduration> element has no attributes.

   The <maxrecordduration> element has a content model describing the
   maximum duration of recording as a time designation (Section 4.6.7).

4.4.2.3.  <dialogs>

   The <dialogs> element provides audit information about dialogs.

   The <dialogs> element has no attributes.

   The <dialogs> element has the following sequence of child elements (0
   or more occurrences):

   <dialogaudit>:  audit information for a dialog (Section 4.4.2.3.1).
      The element is optional.

Top      Up      ToC       Page 71 
4.4.2.3.1.  <dialogaudit>

   The <dialogaudit> element has the following attributes:

   dialogid:  string identifying the dialog.  The attribute is
      mandatory.

   state:  string indicating the state of the dialog.  Valid values are
      preparing, prepared, starting, and started.  The attribute is
      mandatory.

   connectionid:  string identifying the SIP dialog connection
      associated with the dialog (see Appendix A.1 of [RFC6230]).  The
      attribute is optional.  There is no default value.

   conferenceid:  string identifying the conference associated with the
      dialog (see Appendix A.1 of [RFC6230]).  The attribute is
      optional.  There is no default value.

   The <dialogaudit> element has the following child element:

   <codecs>  element describing codecs used in the dialog.  See
      Section 4.4.2.1.  The element is optional.

   For example, a fragment describing a started dialog that is using
   PCMU and telephony-event audio codecs:

   <dialogaudit dialogid="1234" state="started" conferenceid="conf1">
    <codecs>
     <codec name="audio">
      <subtype>PCMU</subtype>
     </codec>
     <codec name="audio">
      <subtype>telephone-event</subtype>
     </codec>
    </codecs>
   </dialogaudit>

4.5.  Response Status Codes

   This section describes the response codes in Table 1 for the status
   attribute of dialog management <response> (Section 4.2.4) and audit
   <auditresponse> (Section 4.4.2) responses.  The MS MUST support the
   status response codes defined here.  All other valid but undefined
   values are reserved for future use, where new status codes are
   assigned using the Standards Action process defined in [RFC5226].
   The AS MUST treat any responses it does not recognize as being
   equivalent to the x00 response code for all classes.  For example, if

Top      Up      ToC       Page 72 
   an AS receives an unrecognized response code of 499, it can safely
   assume that there was something wrong with its request and treat the
   response as if it had received a 400 (Syntax error) response code.

   4xx responses are definite failure responses from a particular MS.
   The reason attribute in the response SHOULD identify the failure in
   more detail, for example, "Mandatory attribute missing: src in media
   element" for a 400 (Syntax error) response code.

   The AS SHOULD NOT retry the same request without modification (for
   example, correcting a syntax error or changing the connectionid to
   use one available on the MS).  However, the same request to a
   different MS might be successful, for example, if another MS supports
   a capability required in the request.

   4xx failure responses can be grouped into three classes: failure due
   to a syntax error in the request (400); failure due to an error
   executing the request on the MS (405-419); and failure due to the
   request requiring a capability not supported by the MS (420-439).

   In cases where more than one request code could be reported for a
   failure, the MS SHOULD use the most specific error code of the
   failure class for the detected error.  For example, if the MS detects
   that the dialogid in the request is invalid, then it uses a 406
   status code.  However, if the MS merely detects that an execution
   error occurred, then 419 is used.

Top      Up      ToC       Page 73 
   +------+---------------+-----------------------+--------------------+
   | Code | Summary       | Description           | Informational: AS  |
   |      |               |                       | Possible Recovery  |
   |      |               |                       | Action             |
   +------+---------------+-----------------------+--------------------+
   | 200  | OK            | request has           |                    |
   |      |               | succeeded.            |                    |
   | 400  | Syntax error  | request is            | Change the request |
   |      |               | syntactically         | so that it is      |
   |      |               | invalid: it is not    | syntactically      |
   |      |               | valid with respect to | valid.             |
   |      |               | the XML schema        |                    |
   |      |               | specified in          |                    |
   |      |               | Section 5 or it       |                    |
   |      |               | violates a            |                    |
   |      |               | co-occurrence         |                    |
   |      |               | constraint for a      |                    |
   |      |               | request element       |                    |
   |      |               | defined in Section 4. |                    |
   | 405  | dialogid      | request uses a        | Send a request for |
   |      | already       | dialogid identifier   | a new dialog       |
   |      | exists        | for a new dialog that | without specifying |
   |      |               | is already used by    | the dialogid and   |
   |      |               | another dialog on the | let the MS         |
   |      |               | MS (see Section 4.2). | generate a unique  |
   |      |               |                       | dialogid in the    |
   |      |               |                       | response.          |
   | 406  | dialogid does | request uses a        | Send an <audit>    |
   |      | not exist     | dialogid identifier   | request            |
   |      |               | for an dialog that    | (Section 4.4.1)    |
   |      |               | does not exist on the | requesting the     |
   |      |               | MS (see Section 4.2). | list of dialog     |
   |      |               |                       | identifiers        |
   |      |               |                       | already used by    |
   |      |               |                       | the MS and then    |
   |      |               |                       | use one of the     |
   |      |               |                       | listed dialog      |
   |      |               |                       | identifiers.       |
   | 407  | connectionid  | request uses a        | Use another method |
   |      | does not      | connectionid          | to determine which |
   |      | exist         | identifier for a      | connections are    |
   |      |               | connection that does  | available on the   |
   |      |               | not exist on the MS.  | MS.                |
   | 408  | conferenceid  | request uses a        | Use another method |
   |      | does not      | conferenceid          | to determine which |
   |      | exist         | identifier for a      | conferences are    |
   |      |               | conference that does  | available on the   |
   |      |               | not exist on the MS.  | MS.                |

Top      Up      ToC       Page 74 
   | 409  | Resource      | request uses a URI to | Check that the     |
   |      | cannot be     | reference an external | resource URI is    |
   |      | retrieved     | resource (e.g.,       | valid, can be      |
   |      |               | dialog, media, or     | reached from the   |
   |      |               | grammar) that cannot  | MS, and that the   |
   |      |               | be retrieved within   | appropriate        |
   |      |               | the timeout interval. | authentication is  |
   |      |               |                       | used.              |
   | 410  | Dialog        | request to prepare or |                    |
   |      | execution     | start a dialog that   |                    |
   |      | canceled      | has been terminated   |                    |
   |      |               | by a                  |                    |
   |      |               | <dialogterminate/>    |                    |
   |      |               | request (see          |                    |
   |      |               | Section 4.2).         |                    |
   | 411  | Incompatible  | request specifies a   | Change the media   |
   |      | stream        | media stream          | stream             |
   |      | configuration | configuration that is | configuration to   |
   |      |               | in conflict with      | match the          |
   |      |               | itself, or the        | capabilities of    |
   |      |               | connection or         | the connection or  |
   |      |               | conference            | conference.        |
   |      |               | capabilities (see     |                    |
   |      |               | Section 4.2.2).       |                    |
   | 412  | Media stream  | request specifies an  | Check the media    |
   |      | not available | operation for which a | stream capability  |
   |      |               | media stream is not   | of the connection  |
   |      |               | available. For        | or conference and  |
   |      |               | example, playing a    | use an operation   |
   |      |               | video media resource  | that only uses     |
   |      |               | on an connection or   | these              |
   |      |               | conference without    | capabilities.      |
   |      |               | video streams.        |                    |
   | 413  | Control keys  | request contains a    | Use different keys |
   |      | with same     | <control> element     | for the different  |
   |      | value         | (Section 4.3.1.2)     | control            |
   |      |               | where some keys have  | operations.        |
   |      |               | the same value.       |                    |
   | 419  | Other         | requested operation   |                    |
   |      | execution     | cannot be executed by |                    |
   |      | error         | the MS.               |                    |
   | 420  | Unsupported   | request specifies a   | Use a URI scheme   |
   |      | URI scheme    | URI whose scheme is   | that is supported. |
   |      |               | not supported by the  |                    |
   |      |               | MS.                   |                    |

Top      Up      ToC       Page 75 
   | 421  | Unsupported   | request references an | Send an <audit>    |
   |      | dialog        | external dialog       | request            |
   |      | language      | language not          | (Section 4.4.1)    |
   |      |               | supported by the MS.  | requesting the MS  |
   |      |               |                       | capabilities and   |
   |      |               |                       | then use one of    |
   |      |               |                       | the listed dialog  |
   |      |               |                       | languages.         |
   | 422  | Unsupported   | request references a  | Send an <audit>    |
   |      | playback      | media resource for    | request            |
   |      | format        | playback whose format | (Section 4.4.1)    |
   |      |               | is not supported by   | requesting the MS  |
   |      |               | the MS.               | capabilities and   |
   |      |               |                       | then use one of    |
   |      |               |                       | the listed         |
   |      |               |                       | playback media     |
   |      |               |                       | formats.           |
   | 423  | Unsupported   | request references a  | Send an <audit>    |
   |      | record format | media resource for    | request            |
   |      |               | recording whose       | (Section 4.4.1)    |
   |      |               | format is not         | requesting the MS  |
   |      |               | supported by the MS.  | capabilities and   |
   |      |               |                       | then use one of    |
   |      |               |                       | the listed record  |
   |      |               |                       | media formats.     |
   | 424  | Unsupported   | request references a  | Send an <audit>    |
   |      | grammar       | grammar whose format  | request            |
   |      | format        | is not supported by   | (Section 4.4.1)    |
   |      |               | the MS.               | requesting the MS  |
   |      |               |                       | capabilities and   |
   |      |               |                       | then use one of    |
   |      |               |                       | the listed grammar |
   |      |               |                       | types.             |
   | 425  | Unsupported   | request contains a    | Send an <audit>    |
   |      | variable      | prompt <variable>     | request            |
   |      | configuration | element               | (Section 4.4.1)    |
   |      |               | (Section 4.3.1.1.1)   | requesting the MS  |
   |      |               | not supported by the  | capabilities and   |
   |      |               | MS.                   | then use one of    |
   |      |               |                       | the listed         |
   |      |               |                       | variable types.    |
   | 426  | Unsupported   | request contains a    |                    |
   |      | DTMF          | prompt <dtmf> element |                    |
   |      | configuration | (Section 4.3.1.1.2)   |                    |
   |      |               | not supported by the  |                    |
   |      |               | MS.                   |                    |

Top      Up      ToC       Page 76 
   | 427  | Unsupported   | request contains a    |                    |
   |      | parameter     | <param> element       |                    |
   |      |               | (Section 4.2.6.1) not |                    |
   |      |               | supported by the MS.  |                    |
   | 428  | Unsupported   | request contains a    |                    |
   |      | media stream  | <stream> element      |                    |
   |      | configuration | (Section 4.2.2.2)     |                    |
   |      |               | whose configuration   |                    |
   |      |               | is not supported by   |                    |
   |      |               | the MS.               |                    |
   | 429  | Unsupported   | request contains a    |                    |
   |      | playback      | <prompt> element      |                    |
   |      | configuration | (Section 4.3.1.1)     |                    |
   |      |               | that the MS is unable |                    |
   |      |               | to play on the        |                    |
   |      |               | available output      |                    |
   |      |               | media streams.        |                    |
   | 430  | Unsupported   | request contains a    |                    |
   |      | record        | <record> element      |                    |
   |      | configuration | (Section 4.3.1.4)     |                    |
   |      |               | that the MS is unable |                    |
   |      |               | to record with on the |                    |
   |      |               | available input media |                    |
   |      |               | streams.              |                    |
   | 431  | Unsupported   | request contains      |                    |
   |      | foreign       | attributes or         |                    |
   |      | namespace     | elements from another |                    |
   |      | attribute or  | namespace that the MS |                    |
   |      | element       | does not support.     |                    |
   | 432  | Unsupported   | request tries to      |                    |
   |      | multiple      | start another dialog  |                    |
   |      | dialog        | on the same           |                    |
   |      | capability    | conference or         |                    |
   |      |               | connection where a    |                    |
   |      |               | dialog is already     |                    |
   |      |               | running.              |                    |
   | 433  | Unsupported   | request contains      |                    |
   |      | collect and   | <collect> and         |                    |
   |      | record        | <record> elements and |                    |
   |      | capability    | the MS does support   |                    |
   |      |               | these operations      |                    |
   |      |               | simultaneously.       |                    |
   | 434  | Unsupported   | request contains a    |                    |
   |      | VAD           | <record> element      |                    |
   |      | capability    | where Voice Activity  |                    |
   |      |               | Detection (VAD) is    |                    |
   |      |               | required, but the MS  |                    |
   |      |               | does not support VAD. |                    |

Top      Up      ToC       Page 77 
   | 435  | Unsupported   | request contains a    |                    |
   |      | parallel      | prompt <par> element  |                    |
   |      | playback      | whose configuration   |                    |
   |      |               | is not supported by   |                    |
   |      |               | the MS.               |                    |
   | 439  | Other         | request requires      |                    |
   |      | unsupported   | another capability    |                    |
   |      | capability    | not supported by the  |                    |
   |      |               | MS.                   |                    |
   +------+---------------+-----------------------+--------------------+

                           Table 1: Status Codes

4.6.  Type Definitions

   This section defines types referenced in attribute and element
   definitions.

4.6.1.  Boolean

   The value space of boolean is the set {true, false, 1, 0} as defined
   in Section 3.2.2 of [XMLSchema:Part2].  In accordance with this
   definition, the concept of false can be lexically represented by the
   strings "0" and "false" and the concept of true by the strings "1"
   and "true"; implementations MUST support both styles of lexical
   representation.

4.6.2.  DTMFChar

   A DTMF character.  The value space is the set {0, 1, 2, 3, 4, 5, 6,
   7, 8, 9, #, *, A, B, C, D}.

4.6.3.  DTMFString

   A string composed of one or more DTMFChars.

4.6.4.  Non-Negative Integer

   The value space of non-negative integer is the infinite set
   {0,1,2,...} as defined in Section 3.3.20 of [XMLSchema:Part2].

   Implementation Note: It is RECOMMENDED that implementations at least
   support a maximum value of a 32-bit integer (2,147,483,647).

4.6.5.  Positive Integer

   The value space of positive integer is the infinite set {1,2,...} as
   defined in Section 3.3.25 of [XMLSchema:Part2].

Top      Up      ToC       Page 78 
   Implementation Note: It is RECOMMENDED that implementations at least
   support a maximum value of a 32-bit integer (2,147,483,647).

4.6.6.  String

   A string in the character encoding associated with the XML element as
   defined in Section 3.2.1 of [XMLSchema:Part2].

4.6.7.  Time Designation

   A time designation consists of a non-negative real number followed by
   a time unit identifier.

   The time unit identifiers are "ms" (milliseconds) and "s" (seconds).

   Examples include: "3s", "850ms", "0.7s", ".5s", and "+1.5s".

4.6.8.  Percentage

   A percentage consists of a positive integer followed by "%".

   Examples include: "100%", "500%", and "10%".

4.6.9.  URI

   Uniform Resource Indicator as defined in [RFC3986].

4.6.10.  MIME Media Type

   A string formatted as an IANA MIME media type [MIME.mediatypes].  The
   ABNF [RFC5234] production for the string is:

   type = type-name "/" subtype-name *(";" parameter)

   parameter = parameter-name "=" value

   where "type-name" and "subtype-name" are defined in Section 4.2 of
   [RFC4288], "parameter-name" is defined in Section 4.3 of [RFC4288],
   and "value" is defined in Section 5.1 of [RFC2045].

4.6.11.  Language Identifier

   A language identifier labels information content as being of a
   particular human language variant.  Following the XML specification
   for language identification [XML], a legal language identifier is
   identified by a [RFC5646] code and matched according to [RFC4647].

Top      Up      ToC       Page 79 
4.6.12.  DateTime

   A string formatted according to the XML schema definition of a
   dateTime type [XMLSchema:Part2].



(page 79 continued on part 5)

Next RFC Part