An embodiment of the present invention is a method for server side integration of communication devices and the general purpose PC of the same user through a computer network wherein no physical connection is required between the PC and the communication device. The user registers with PnC (phone and computer) server for subscribing to one or more PnC services such as drop-to-call, conference-call-dropping service, webpage sharing, caller kaleidoscope etc., via user interface of communications device and/or PC. Various features for subscribing and unsubscribing to services are provided along with authenticating the user using the name and the phone number of the user while registering with the server.