Server Asterisk PBX(Or better solution)
Linux, Java, Mysql
Need to create button, if you click on button -pop up message box and ask your phone number, enter your phone number, and system will call to (default) support number for the site we put this button.
E.M system will connect 2 phone numbers and make a call.
User have a problem with product, he try to contact support from company website, click on button contact support and pop up mesahe ask enter your phone number, clint enter it and system make a call to support number(pre-configured in config file)and make connection of 2 numbers.