Restcomm Visual Designer (RVD) is an intuitive web interface designed by Telestax to help developers build  communication applications rapidly. In this tutorial, you will learn how to create a voicemail application without writing a single line of programming language code. The voice message can then be emailed to your desired address.

Use case scenarios:

  • Voicemail directly to your email,

  • Voicemail to a third party (Assistant) for further processing

  • Access email where voicemail server is not available.

Technical Requirements:

  • Basic knowledge of Restcomm

  • Basic knowledge of Zapier service (or alternatives web services integration tool such as

Step 1

You must create an RVD project.


  • You need to create two modules, Welcome module and Send email module.

  • For the Welcome module, in the Say verb text area, enter your welcome message. In the screenshot below the text is "Welcome to record and email application. Please leave a message.".

  • Drag and drop the  Record  verb into the Welcome module as show in the screenshot below.

  • In the Continue To drop down menu field, choose the Send email,

  • Check Play beep.

  • Set the Timeout field to  10 seconds .

  • Leave the rest of the fields as default.


Step 2


  • Click on Make a Zap.

  • Get Web Hook trigger and an Email action app from the drop down menus.

  • Choose a trigger and an action to send an  outbound email.

  • Press Continue and go to the next step, Web Hook.


  • Copy the Webhook URL to clipboard and click on Continue

  • Select an email account if not already done


Step 3

Send email module steps

  • Go back to RVD

  • Go to Send email module and paste the WebHook URL in the Service Url  text area.

  • Drag and drop Say module. In the text area enter the following text: "Thank you for calling. We will get back to you as soon as possible."

  • The Send email module requires an External Service called Zapier. where the recorded message will be processed and a URL will the recorded message will be returned to Restcomm

  • Restcomm will return the URL of the recorded message to the Destination email specified in the Send email module.

  • The user can then listen to the voicemail message by accessing the  URL contained in the message email message.

  • The recorded message will be available in the $core_PublicRecordingUrl variable.

  • In older versions of Restcomm, the variable is $core_RecordingUrl.

Fill the following URL parameters as follows

  • Name: recordingUrl

  • Value:  $core_RecordingUrl

  • Name: destination



 Step 4

  • Go back to Zapier. and enter the name of the Values: $core_RecordingUrl

  • Enter the  email address to which the email will be sent.


  • Match up the web hook to the outbound email.

  • Enter the email, subject, body text etc.

  • It is important to choose the appropriate type of attachments


  • Finally, test the Zap.

  • Copy the Webhook URL to your web browser and add the following parameters:" class="bare">

  • Your email will be different

  • This will return a Json object as shown below


  • You can now give your Zap a name and activate it.


Application is finished. You can call your Restcomm number and test it.