Two people talking on a wire, not really a lot of material innovation since then. Automatic switching was a breakthrough but different technology. Wireless really just moved Bell’s concept to radio. And VoIP inexplicably keeps being used to emulate 135 year old technology. Not suprising that it took an outlier like Skype to bring real innovation to communications by integrating VoIP with file sharing technology. Although Zennström was working at the European telecom operator Tele2.