One of the advantages frequently mentioned for IP-based voice networks is reducing timeframes to roll out new and innovative services. Tracing the source of this advantage goes all the way back to the differences in underlying architecture between IP and TDM networks.

IP networks adhere to the OSI Model to separate conceptually similar network functions into layers. Within a network, each layer may be controlled by separate software, hardware, locations, or even organizations.

By contrast, in the TDM world, leading equipment manufactures such as Nortel bundled the various functions involved in managing and controlling voice networks into big switches. To release a new feature, manufacturers had to consider the product cycle of an entire, complex, piece of equipment. Further, high upfront expenses to upgrade and replace switches slowed the pace of adoption on the carrier end.

By moving to IP, service providers can break each component down and situate it in the network, logically and physically. Each piece then scales and innovates on its own. Simpler product roadmaps, lower prices and more competition all lead to shorter timeframes between new releases, and lower barriers to adopt innovative new features.