Topics: Communication engineering studio, intercom system, side tone connection, communication process, transmission media, communication setup, communication system software, honey spot, service denial, eavesdropping, spoof, information leakage, data lose, hardware failure, telephone system, full duplex communications, wireless communication, telephone system side tone connection, communication systems software, information protection strategies, Antenna, Antenna radiation patterns, optical fiber, Friis transmission formula, communication systems security, communication systems protection