As a result of the evolution of the telecommunication networks in recent years, signal processing features such as voice quality enhancement processing may now be found in different communication nodes and combined in different ways on a bearer path. However, instead of the intended purpose of preserving or enhancing voice quality, signal processing functions deployed on the same bearer path could cause overall voice quality degradation due to undesirable side-effects of the interaction of the individual functions.
The concerns about the interaction of signal processing functions can be mitigated if the communication nodes are properly coordinated and controlled to provide the end-to-end communication with the optimal placement of signal processing functions. Whilst local operators may have direct control of some of the equipment, this control by the local operators may not extend to all the nodes in call scenarios such as inter-system links. The traditional "static" approach to the coordination of signal processing functions, such as those found in voice enhancement equipment, may not meet the requirements of modern call topologies, which tend to be dynamic. Lack of coordination of the signal processing functions may result in voice quality degradation.
Recommendation ITU-T G.799.2 defines a generic framework for a coordination mechanism intended to minimize undesirable interactions of signal processing functions present on bearer paths of a communication link. The goal of this Recommendation is to provide a mechanism that can be used to optimize the end-to-end voice quality.