Setting up an update server
Joomla! has a built-in update software that allows you to easily update your core Joomla! version, often referred to as one-click updates (even though it usually take a few clicks to launch it). This update mechanism is also available to third-party Joomla! extensions; however, it involves you setting up an update server.
You can try this out on your local development environment. To do so, you will need two Joomla! sites: http://localhost/joomla3, which will be our update server, and http://localhost/joomlatest, which will be our site that we are going to try to update the extensions on. Note that the update server does not need to be a Joomla! site; it could be any folder on a web server.
Install our click-to-call plugin on the http://localhost/joomlatest site, and make sure it's enabled and working. To enable the update manager to be able to check for updates, we need to add some code to the clicktocall.xml installation XML file under /plugins/content/clicktocall...
