This Recommendation provides the methods for monitoring GOS parameters in fixed and mobile telecommunications networks. GOS monitoring is considered for all traffic related GOS parameters defined in ITU‑T Recommendations.
The GOS monitoring methodology is based on the principle that the measurements that are available are those that a network operator can obtain on a continuous basis using measurements taken at network elements. All measurements are defined so that a network element can provide the data without requiring coordination or communication with any other network element. An implication of this principle is that for all GOS parameters that involve multiple networks, each network’s contribution to the GOS parameter is monitored and the overall GOS parameter is monitored only if it is possible from measurements taken within a single network.