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With this latest revision, our main priority was to resolve unclear or incomplete areas of the CCXML specification. During this process several sections of the. The CCXML specification defines both a state machine and event handing syntax and a standardized set of call control elements. This tutorial implements the CCXML specification that was used for the CCXML is a new language, so new that the W3C specification has not.

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When a CCXML session ends, all active connections, conferences and dialogs that are owned by that session are automatically terminated by the platform.

Cover Pages: Voice Browser Call Control (CCXML)

Caller calls an number and after some interaction with an IVR system places an outbound call to a friend. This property must be set to the ECMAScript string value of the printable error message associated with this error.

All events MUST contain an eventsource attribute containing a unique identifier for the event source. The ID of the event source referenced either directly via the source attribute or indirectly via the event attribute of the move element.

This functionality has been filled by vendors who provide proprietary extensions that are not usually portable from one platform to another. Then the system calls the current number of the target person, and asks if the call should be connected.

Call Control eXtensible Markup Language

Any questions or concerns that are raised during this phase can either be addressed in another Last Call Working Draft or in the final Candidate Recommendation, depending on how significant the resulting changes are. Other fields will always be present. This is the same identifier as was returned on the sessionid attribute of the createccxml request that created the session. Multiple-party conferences mean VoiceXML needs a more effective way of handling telephony resources.

These scenarios are described below. A CCXML application can determine the reason its session was started by evaluating the contents of the session. While developing and maintaining speech applications in two languages may be feasible, it’s preferable for the industry to work toward a single language for developing speech-enabled interfaces as well as multimodal applications.

For “hotword” recognition on a two-party call, a two-way full duplex bridge must be established between two network Connections, and a one-way half duplex bridge must be established from one of the network Connections to spceification Dialog used to perform the recognition.


Specificqtion streams between Connections, or between Connections and Conference objects, need to be tracked by the CCXML interpreter and will take real system resources. This property is a URI which addresses the remote device; for an incoming call, this is the calling URI; for a redirected incoming call, this is the requester of the most recent redirection, and prior values are contained in the “redirect” property; for an outgoing call, this is the called URI. Figure 1 shows the architecture of a telephony implementation consisting of four specigication components:.

A character string that indicates the character encoding type of the cccxml. This indicates that the document is willing to use content whose age must be no dcxml than speckfication specified time in seconds cf. The identifier of the conference to which specificatiob dialog connection is bridged usually the conferenceid that was specified in the dialogstart or dialogprepare.

The ECMAScript object returned contains information which may be used by the implementing platform when creating the conference. Conferences can be named in order to facilitate the use of that conference in other sessions.

This example is not meant to be a complete application and does not handle all error events but is speciification meant to give an overview of what such an application may look like.

Implementations MAY disallow two dialogs from being joined together. Users can be offered the ability to place outbound calls, conditionally answer calls, and to initiate or receive outbound communications such as another call If the entertone value is a URL which points to a user-defined wav file, that wav file will be played instead of the default system beep.

Other variable declared in this part of the XSLT must not be changed because they are part of the framework. For instance, it is legal for one CCXML session to unconditionally kill another session by sending a ccxml.

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Content of this field is platform-specific. To accomplish this, a Java class is used. This must be the same identifier as was returned on the sessionid attribute of the createccxml request that created the session. Several of the events defined in this section are associated with the change in state of a Connection Object.


A string describing the reason the platform sent speckfication kill event. Events injected into an active CCXML session by the ” basichttp ” processor provide the standard event attributes as described in Section 9.

This element instructs the implementation to allocate a Conference Object using the specified options. Inside the Raspberry Pi: A Voice Dialog, when speciification, is associated with a specific Connection by which the Voice Dialog may interact with one-way or two-way media streams from other Connections or a Conference Object.

This event MUST be emitted to indicate a successful redirection of a connection.

A failed fetch must return the error. If the connectionid attribute is omitted, the interpreter must reject using the id indicated in the current event being processed.

Over the last few years, developers have increasingly used CCXML to add robust call control features to their telephony applications. References to threads are meant as logical threads and do not imply any specific platform implementation. If any bridges are terminated in this fashion, speification ‘conference. Here’s the DTD for the Manifest:. In particular, it is designed to facilitate prior compilation for execution in a lightweight environment.

W3C liabilitytrademark ccsml document use rules apply. Due to the way ECMAScript treats var declarations the initial ID will evaluate speification undefined as ECMAScript adds a implicit var declaration to the top of the script and changes the var to an assignment leaving you with something that is executed as if it was written like this:.

This should be however, not a must equivalent to the transition presented in D efault-transition. Ability to give each active call leg its own dedicated VoiceXML interpreter.

However on a platform where the actions are optimized into a single ECMAScript execution block something like the following code would actually be executed instead: Indicates which entity cause the disconnection to occur. An ECMAScript expression which returns a character string that specifies the MIME type of the document, and as ccdml result determines which dialog manager environment must actually be used.

Connections c1 and c2 are connected with a half duplex bridge, connection 3 is not bridged at this point.