Older Phones and Phone Systems on VoIP. In the fall of 2004, an email conversation began on the Telephone Collectors International. Several folks who had restored older PBXes and CO switching systems had begun to wonder, now that Voice Over IP was beginning to be viable, if there was a way to connect their switches together via the internet. Someone mentioned the Asterisk VoIP PBX. These are connected not only by Asterisk VoIP PBXes, but also by other VoIP PBXes, Anal.

Editor-in-Chief, IEEE Transactions on Circuits and Systems II. Chair Professor of Electronic Engineering. Department of Electronic and Information Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong. IEEE Distinguished Lectures and Plenary Lectures. A Network Perspective of Worlds Stock Market.