G.1027: QoS metrics for the assessment of the impact of fixed geographic structures on telephony quality and call stability
Often, poor call stability or a degradation in speech quality is associated with natural or artificial geographic or topological structures, such as tunnels, ravines or noise barriers. This Recommendation extends ITU-T Rec. G.1034 by defining a set of metrics which describe call stability and changes of speech quality related to such structures.
AAP Current Status
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