title: How to make a call to Telephone by TAPI?
body: <p>I need to design an API that enables phone number, when clicked, make a call via TAPI system. How should it be achieved via Programming?</p>
  
  <p>I am using CakePHP application. Also, the user needs to enable Call in Desktops, mobile and Tablets. Is there any apis available for such Interfacing?</p>
  
  <p>I tried using:</p>
  
  <pre><code>&lt;a href="tel:8005550199"&gt;Call 800-555-0199&lt;/a&gt;
  </code></pre>
  
  <p>But I got the following error in firefox:</p>
  
  <pre><code>The address wasn't understood
  
  Firefox doesn't know how to open this address, because one of the following protocols (tel) isn't associated with any program or is not allowed in this context.
  </code></pre>