January 2013
The infrastructure of the Public Switched Telecommunications Network (PSTN) is transitioning from TDM (time division multiplex) technology to IP (Internet Protocol). The TDM single-purpose voice connection to the consumer, is being replaced by a multi-purpose broadband IP connection. It is important for the industry to evaluate the impact of this transition on processes and regulation, and make changes and recommendations where necessary. This document assesses the impact on services, access, transport, and numbering, providing conclusions and recommendations for each topic.