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The root element for all Vobiz XML documents. Every XML response must be wrapped in a single Response element.

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Purpose

The Response element acts as the container for all XML verb elements that control call behavior. It tells Vobiz that the XML document contains valid call instructions and marks the beginning and end of your call flow logic.

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Attributes

TypeRequiredDescription
--The Response element has no attributes.

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Nesting rules

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Allowed child elements

The Response element can contain the following verb elements:

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Details

  • <Dial> - dial a phone number or SIP user
  • <Speak> - synthesize speech
  • <Play> - play an audio file
  • <Record> - record the call
  • <Gather> - collect DTMF or speech input
  • <Hangup> - hang up the call
  • <Redirect> - redirect to another XML URL
  • <Wait> - pause the call
  • <Conference> - join a conference room
  • <PreAnswer> - play audio before answering
  • <DTMF> - send DTMF tones
  • <Stream> - start an audio stream

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Parent elements

The Response element has no parent - it is always the root element. Important: Every XML document must have exactly one Response element. Multiple Response elements or a missing Response element will result in an XML parsing error.

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Examples

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Basic usage

<?xml version="1.0" encoding="UTF-8"?>
<Response>
    <Speak>Hello! This is a basic XML response.</Speak>
</Response>

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Multiple actions

<?xml version="1.0" encoding="UTF-8"?>
<Response>
    <Speak>Thank you for calling Vobiz support.</Speak>
    <Play>https://yourcdn.com/hold-music.mp3</Play>
    <Dial>
        <Number>+14155551234</Number>
    </Dial>
</Response>
Verb elements are executed in the order they appear. In this example, Vobiz speaks the message, plays the hold music, and then dials the number.

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IVR flow

<?xml version="1.0" encoding="UTF-8"?>
<Response>
    <Gather action="https://your-domain.com/gather/" method="POST" numDigits="1" executionTimeout="10">
        <Speak>Press 1 for sales, press 2 for support.</Speak>
    </Gather>
    <Speak>We didn't receive your input. Goodbye!</Speak>
    <Hangup/>
</Response>
This response collects one digit from the caller. If no input is received within 10 seconds, it speaks a goodbye message and hangs up.

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Empty response

<?xml version="1.0" encoding="UTF-8"?>
<Response>
</Response>
An empty Response element is valid but performs no actions. The call continues without any instructions. Use this for call events where no action is needed.

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Best practices

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Always include the XML declaration

Start your XML documents with <?xml version="1.0" encoding="UTF-8"?> to ensure proper parsing and character encoding.

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Validate your XML

Use an XML validator or linter during development to catch syntax errors before deploying to production. Malformed XML will cause call failures.

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Set the proper Content-Type

When your application responds to Vobiz webhooks, set the HTTP Content-Type header to application/xml or text/xml. A text/html or text/plain response causes a parsing error and drops the call.

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Stay within the size and time limits

Keep each XML response under 100 KB and return it within 1-2 seconds. Verbs execute strictly top-to-bottom; an element that hands control elsewhere - <Redirect> or a <Dial>/<Gather>/<Record> action URL - ends processing of the current document, so anything after it acts as a fallback only if that handoff does not occur.