Call Tag variables

The Call Tag variables enable additional call information to be sent from a state table to a signaling process, and for the signaling process to return information to a state table. For more detailed information about their use within state table actions, see AnswerCall and MakeCall.

Note: For a numeric list of all System Variables, see Table 1.
System : Call Info : Info in (SV542)

This string variable, passed from a signaling process to a state table contains information about a call such as calling party data or the service to which they wish to be connected. The call information is put together by SIP or can be tailored to provide tags specific to custom-written signaling processes

This call information is passed in the form of a string containing tagged data values and attributes. The length of the string varies depending on the number of tags and data contained within the tags. The permitted tags and associated variables are described below in

For details of the tags that have been added to allow applications to send and receive URIs to/from the SIP stack, refer to “Voice over IP tags” in the Blueworx Voice Response for AIX: Voice over IP using Session Initiation Protocol information.

For incoming calls, SV542 may contain call setup information from the onset of the first state table invoked (by default this is Incoming Call). This information is overwritten by AnswerCall action, after which SV542 holds call answer acknowledgement information.

System : Call Info : Info out (SV541)

This string variable, similar to SV542, is used to send call information from a state table to a signaling process via a signaling library request block. The variable provides call information for SIP or can be tailored to provide tags specific to custom-written signaling processes.

This call information is passed in the form of a string containing tagged data values and attributes. The length of the string varies depending on the number of tags and data contained within the tags. The permitted tags and associated variables are described below in

For details of the tags that have been added to allow applications to send and receive URIs to/from the SIP stack, refer to the section “Voice over IP tags” in the Blueworx Voice Response for AIX: Voice over IP using Session Initiation Protocol information.

System : Call Info : Disconnect Info (SV543)

This string variable, passed from a signaling process to a state table, contains call information relating to a disconnect {such as cause and diagnostics in the event of a far-end caller or network hangup}.

The call information is put together by SIP, or can be tailored to provide tags specific to custom-written signaling processes.

The information is passed in the form of a string containing tagged data values and attributes. The length of the string varies depending on the number of tags and data contained within the tags. The permitted tags and associated variables are described below in

For details of the tags that have been added to allow applications to send and receive URIs to/from the SIP stack, refer to the section “Voice over IP tags” in the Blueworx Voice Response for AIX: Voice over IP using Session Initiation Protocol information.

Parent topic: System variables