The switching system presented in this paper will enable the and construction of microcontroller-based telephone exchange system,. Cheap and easy guide to building a private telephone system step 1: what is a private branch exchange (pbx) these boxes have gotten very inexpensive and well integrated into all sorts of nice internet based phone services leds linux microcontrollers microsoft mobile photography raspberry pi.
Abstract—this paper demonstrates design and construction of microcontroller- based telephone exchange system and the aims of this paper is to study. Learn the operation of automatic telephone exchange/ epabx cmos cross point switching for speech communication (microcontroller based) standard. Microcontroller,vlsi & embedded system based project based) 61 ultra sonic distance meter 62 eight line private telephone exchange 63 iinfra red control .
Introduction in this project, we demonstrate the 4 line telephone systems with full signaling and switching functions similar to those of the central office systems.
Computer or a microcontroller through the telephone system allows one to enter the microcontroller to exchange information with the outside world based on the commands received, the microcontroller may perform various control.