Ian Plain has worked in the telecoms industry since 1981 and has designed some of the largest PBX networks in the UK. Since the late 1990s, he has been involved with VoIP initially for links between systems, and with IP PBX systems since 1999. Since 2003, he has been running a telecoms consultancy based near Bath in the UK, working primarily on high-availability Asterisk-based solutions for corporate customers.
