 For example, the Microsoft TAPI specification can be implemented only on the Microsoft Windows family of operating systems, and the Novel Telephony Services CTI server (now discontinued) could be used only on Novell networks.By contrast, CT Connect's client-server architecture permits client modules that offer various CTI APIs, and all client modules can interoperate with a common CTI server module.Like CTI APIs (see above), most CTI servers operate under only one operating system.