Simple IVR

Below is a sample of a simple IVR call scenario. The Callflow below demonstrates an example scenario where a callback is placed to a customer seeking technical support. Then in the same call the user has the ability to either contact a member of technical support, end the call or repeat the main menu.

Demo Video

This video will show a demo of how the Advanced IVR menu will work, including showing webhooks and the Initial API Call.

YouTube Link

GitHub Repo with Sample Backend Code

In order to make use of the Callflows API, you will need to setup not only Webhooks but a backend server to respond to those webhooks. We have provided a code sample of backend code in Python that processes the webhooks and responds to them to trigger actions in the IVR.

Note: The code for the Simple IVR is under app_simple_ivr.py

GitHub Repo

Diagram of Simple IVR Flow

Below is a description of the IVR Tree that we will be building with this call scenario. There are 3 possible paths and only 1 level in this simple IVR Tree.

Webhooks and API Calls in Simple IVR Flow

Below is a diagram of how the webhooks and API Calls from your server will work with the 8x8 Voice Platform to create this IVR.

Example of initial API call to place outbound call

This is the URL to send the initial API request to.

/POST voice.wavecell.com/api/v1/subaccounts/{sub-account-id}/callflows - v1.2

This is the request body to send the API request to as well. Note, you will need to replace the source with a 8x8 virtual number in your account and destination with a destination phone number to call.

{
    "callflow": [
          {
            "action": "makeCall",
            "params": {
              "source": "6561115777",
              "destination": "6512345678"
              }
        },
        {
          "action": "sayAndCapture",
          "params": {
              "promptMessage": "Dear customer, Thank you for contacting Xyz technical support recently. If you have resolved your issue already, press one. Or press two to speak to an agent.",
              "voiceProfile": "en-US-BenjaminRUS",
              "repetition": 1,
              "speed": 1,
              "minDigits": 1,
              "maxDigits": 1,
              "digitTimeout": 10000,
              "overallTimeout": 10000,
              "completeOnHash": false,
              "noOfTries": 2,
              "successMessage": null,
              "failureMessage": "Invalid input, please try again"
              }
        }
    ]
}

Example Response Body for an Callflows API request.

Below are examples of successful and failure responses to the API request above. Depending on the error the status message may change.

Success

{
    "sessionId": "d9874358-89ac-4c50-bbab-1eb634482a94",
    "sessionStatus": "CREATED",
    "callFlowRequestId": "89b545a5-0676-11ee-8100-d500c0d203fc",
    "statusCode": 1,
    "statusMessage": "Created"
}

Failure

{
    "sessionStatus": "NOT_CREATED",
    "callFlowRequestId": "0564e804-0a7e-11ee-9c83-6df9c048a122",
    "statusCode": -1002,
    "statusMessage": "Speech profile or language parameter invalid"
}

Explaining Session Status in Callflows Response Body

Session status indicates if a call is successfully accepted & created or not created on the 8x8 platform. 8x8 returns two status:

  • CREATED- call is successfully created on the platform.
  • NOT CREATED- call is not successfully created on the platform and 8x8 returns statusCode and statusMessage to understand why the call was not accepted on the platform

Status Code and Status Message

Status CodeMessage
1Created
-1001Invalid JSON request body
-1002Speech profile or language parameter invalid
-1003Valid maxDigits required when minDigits provided
-1005Valid overallTimeout is required when digitTimeout provided
-1007$.callflow[0].action should be one of: [Call action names]
Eg: $.callflow[0].action should be one of: say,playFile,sayAndCapture
-1008Valid maxDigits is required when completeOnHash is false
-1009Invalid call flow entry provided. [Additional error details here].
Eg: Invalid call flow entry provided. $.callflow[0].params.text: is missing but it is required
-9999An unknown error has occurred

VCA Webhook Example

Once the initial call is made and the user responds with a DTMF input, the server will be sent a VCA webhook which will contain the DTMF input as part of the response body:

{
  "payload": {
    "eventId": "ddc1e44a-9a40-11ee-b7e9-838e846e8a11",
    "callId": "d6333b3f-9a40-11ee-b57c-09a88813d857",
    "sessionId": "d62f91ba-9a40-11ee-945e-5f476b4334a1",
    "subAccountId": "InternalDemoCPaaS_8dD15_voice",
    "callStatus": "DTMF_RECEIVED",
    "callDirection": "OUTBOUND",
    "callType": "PSTN",
    "source": "+6391111111111",
    "destination": "+6599999999",
    "sourceFormat": "MSISDN",
    "destinationFormat": "MSISDN",
    "sourceCountryCode": "PH",
    "destinationCountryCode": "SG",
    "callDuration": 0,
    "dtmf": "3",
    "sipCode": 200,
    "timestamp": "2023-12-14T05:23:08.406Z"
  },
  "namespace": "VOICE",
  "eventType": "CALL_ACTION",
  "description": "Action request of a call"
}

This will allow your server to identify the DTMF input and reply with a callflow as the VCA webhook response. Below are examples of Callflow responses. Responding to the VCA webhook with one of these callflows below will trigger the corresponding action.

DTMF Input 1 - Hangup

Responding with the callflow below will immediately end the call.

{
    "callflow": [
          {
          "action": "hangup"
        }
    ]
}

DTMF Input 2 - Connect Call

Responding with this callflow will connect the existing call to a different number.

{
    "callflow": [
          {
          "action": "makeCall",
          "params": {
            "source": "6512345678",
            "destination": "6561115777"
            }
        }
    ]
}

DTMF Input Other - Repeat Menu

Responding with this callflow will repeat the main menu.

{
    "callflow": [
          {
          "action": "sayAndCapture",
          "params": {
              "promptMessage": "Sorry, we did not understand your response. If you have resolved your issue already, press one. Or press two to speak to an agent.",
              "voiceProfile": "en-US-BenjaminRUS",
              "repetition": 1,
              "speed": 1,
              "minDigits": 1,
              "maxDigits": 1,
              "digitTimeout": 10000,
              "overallTimeout": 10000,
              "completeOnHash": false,
              "noOfTries": 2,
              "successMessage": null,
              "failureMessage": "Invalid input, please try again"
              }
        }
    ]
}

Voice Session Summary Webhook

Upon termination of the session the session summary(VSS) will be returned via webhook. To learn more about the Voice Session Summary, please click here.

Glossary of Callflow Actions used in a successful Voice Messaging call scenario