I have a project on phone busy indicator.I want you to help me with this content: 1.abstract 2.introduction 3.operation of the system

Sometimes it often happens that a phone line is shared by several phones to pick up one of them to make a call that we find that the line is being used by another person, a fax or a modem. To avoid these problems and maintain a good character, it will be useful to place a device that tells us when the line is being used by another person or device.

Electronic Simulation with Livewire