From Longman Dictionary of Contemporary Englishtelephonyte‧leph‧o‧ny /təˈlefəni/ noun [uncountable]  telephone services, systems, or communicationFrom Longman Business Dictionarytelephonyte‧leph‧o‧ny /təˈlefəni/ noun [uncountable] the activity and business of providing telephone servicesNow, devices for telephony, entertainment, and data all interact. 
                                                    
                                                
