Inbound Call Control

Introduction

Opentact offers versatile solutions for controlling inbound calls through two distinct methods: Call Flow XML and Call Control API. This section provides an overview of the Call Flow XML, a powerful tool for defining XML documents that intricately manage the flow of inbound calls.

Call Flow XML:

Static or Dynamic Hosting: Call Flow XML can be either hosted as a static document within Opentact or dynamically provided through a Call Flow webhook URL.

Interactive Manipulation with <Gather>: Within the Call Flow XML, Opentact introduces interactive manipulation using the <Gather> tag. This feature prompts the callee to input a DTMF key. Once received, Opentact triggers a RESTful API specified by you, and based on the API's return, a new Call Flow XML is generated, tailoring the call flow to the specific user input.

Example Call Flow XML:

<?xml version="1.0" encoding="UTF-8"?>
<Response>
    <Say>Thank you for calling Opentact.</Say>
    <Record />
    
    <Gather numDigits="1" attempts="2" timeout="10000" finishOnKey="*">                    
        <Say>Now please enter a 1 for man, 2 for woman.</Say>
        <Switch>
            <Case dtmf="1">
                <Say>Hi, man</Say>
                <Callback url="https://webhook.site/8b27856b-b16b-4933-8be2-befcd24932f6"/>
            </Case>
            <Case dtmf="2">
                <Say>Hi, woman</Say>
                <Dial>
                    <Sip>1000@x.x.x.x:9000</Sip>
                </Dial>
            </Case>
            <Default>
                <Say>Hi, nobody</Say>
                <Callback method="post" url="https://webhook.site/8b27856b-b16b-4933-8be2-befcd24932f6" />
            </Default>
            <Error>
                <Say>No DTMF Code entered.</Say>
            </Error>
        </Switch>
    </Gather>
     
    <Hangup />
</Response>

In this example, Opentact dynamically fetches a new Call Flow XML based on the received DTMF input, offering a tailored call experience. Explore the possibilities of interactive call control with Opentact's Call Flow XML.