The offer of new next generation network (NGN) services requires new key performance indicators (KPIs), quality of service (QoS), measurement, and benchmarking methods which are needed to ensure the quality of new services. To ensure the comparability of test results, reference benchmarking methods and background traffic load profiles are needed.

This Recommendation identifies and defines KPIs for voice and fax telephony services, as well as benchmarking methods for the spectrum of potential applications.

The scope of the defined testing procedures is the evaluation of the network access by VoIP and FoIP fixed-network services. The measurements are conducted stationary between a subscriber access-point to a measurement point emulating an idealized termination point in the core network. All access technologies offered by the operator under test are considered. In this context, the measurements and KPIs determinations are performed by analysing signals which are accessible on the network.