several sms-gateway like KANNEL. The goals is an integrated users manager, sms templates, a flexible admin control panel. Sms bulk are sended through a simple web interface that can be made with to fit various send-system. With KSMS you can manage a complete list of numbers GSMS to which sending the SMS. You can activate all the customers what you want and to everyone of they you will be able to associate or to remove some privileges.