| 摘要 |
An apparatus and method achieve a level of telephony application functionality commensurate with TDM (Time Division Multiples) device interfaces used in legacy PSTN (Public Switched Telephone Network) (19) voice and facsimile telephony applications. The apparatus and method rely upon the architectural model embraced by VOP (Voice Over Packet) carrier network standards, and include network elements and a protocol framework. The apparatus and method build upon the SIP model to incorporate essential telephony application functions previously only available using a PSTN (19) infrastructure. The telephony service interface incorporates mechanisms for both call control and media control operations. Together, the apparatus and method transition the legacy PSTN (19) telephony application services model to a data-centric model by exploiting the switching and digital signal processing capacity of a software switch controller (2) and a media gateway (3) defined as core network elements in the VOP carrier network.
|
