Vocalect offers their biometric engine using hosted subdialogs, allowing your application to hand off control of the call to the Vocalect server for processing and verification of your caller’s voice. Your application will record the caller’s voice, and then pass it to the Vocalect subdialog.

<subdialog name="dialogid" src="subdialogurl" namelist="customer userid ..." method="post" enctype="multipart/form-data" />

Here are the steps involved in getting started authenticating callers with Vocalect.

• Apply for a Vocalect trial account
• Have a quick technical review session with Vocalect
• Start an enrollment session
• Record the caller’s voice, submitting it to a Vocallect subdialog
• Generate an enrollment from the recorded voices
• Start a verification session
• Record the caller’s voice and submit it to a Vocalect subdialog
• Check the result code to determine if verification succeeded.

To get started, download the Vocalect trial account form and a copy of Vocalect's Acceptable Use Policy (AUP). Review the AUP, complete the form and scan it. Email it to trials@vocalect.com to get your account provisioned. Vocalect will contact you for a quick (15-20 minute) technical review session to make sure you have everything you need to get started. After the session, Vocalect will provide you with your account credentials.

The sample application included here is a very simple case. It greets the caller, starts enrollment, and then verifies them. In a real-world application you would likely have enrollment as a separate step from verification, checking at the beginning of each call to see if a caller was previously enrolled.

In this simple application, we’ll greet the caller with a <prompt> and then start enrollment, kicking things off by setting the account credentials provided by Vocalect. We’ll start an enrollment session by calling the Vocalect subdialog, then record the caller’s voice. The recording is passed to the hosted AudioCheck subdialog for processing and then a final call is made to the EnrollUser subdialog. In your production application, you’ll likely want to make several recordings, passing each one to AudioCheck before calling EnrollUser. Finally, clean up your session by calling the FinishTransaction subdialog.

Once the caller is enrolled, verification begins. Verifying a caller is a very similar process to enrolling them. We start a verification session with our Vocalect credentials, then record the caller’s voice. The recording is posted to the VerifySample subdialog and Vocalect sets a flag for success or failure. The caller is told what happened, and then we end our session with a call to the FinishTransaction subdialog.

You can get the sample VoiceXML application from Voxeo’s GitHub account.