Lee S. Dryburgh is a person-to-person communications technologist. He is both an engineering doctoral candidate at UCL (with sponsorship from Cisco) and a part-time SS7 (including Sigtran/Camel/Map) consulting engineer via his company 'SS7.net'. He has performed work for numerous operators including British Telecom, O2, Sprint, T-Mobile, Orange, Verisign, Hutchinson 3G, as well as vendors including Marconi, Nokia, Alcatel, Lucent, Nortel, and Cisco. He is an acknowledged expert in the telecommunication protocol suite, Signaling System #7 (SS7/C7), and lead-authored the bestselling book on the topic. His research focus is the future of telephony and in particular enabling conversation between relevant strangers.