If you have been following the Telecommunications industry for a decade or more you will likely remembers IMS (IP multimedia system) as the technology architecture developed by the leading circuit switch voice vendors (i.e., Lucent and Nortel) in the late 1990s as the technology that would save their declining voice businesses but they were far ahead of time.
This vision eventually came to fruition, but in a much smaller way in the long-distance network (4ESS) which was rebuilt using soft switches and media gateways to enable the use of
