Welcome to the OutSys Quality Experience Delivered (QED) Online Interactive Demo Tool.
This experimental tool is built upon the OutSys ProbOS Solution, which continuously generates accurate network performance measurements with its own distributed probes and reflectors. ProbOS then computes and analyzes these measurements through its QED module.
ProbOS measurements adhere to the standards outlined by the Broadband Forum TR-452.2 for Quality Attenuation Measurements using Active Test Protocols , and their computation and analysis are conducted according to TR-452.1 Quality Attenuation Measurement Architecture and Requirements.
Various network access technologies over different time frames can be easily compared and displayed, with the option to align their graphs on a single scale.
Your feedback is appreciated to enhance this resource: probos@outsys.com.
DeltaQ
These graphs display the Quality Attenuation (ΔQ) results, both upstream and downstream. For each test, in addition to packet loss, the three components of Quality Attenuation are displayed: ■ΔQ|G is the distribution of inherent delay introduced by the path itself; ■ΔQ|S is the distribution that is a function of packet size and incorporates things like serialization and de-serialization time; ■ΔQ|V is the distribution of delay introduced by the fact that the network is non-idle and incorporates things like queuing time;
Cumulative Distribution Function
These graphs, both upstream and downstream, show how long it takes to deliver 90, 95 and 98 percent of packets.
DeltaQ and MOS
This graphs show the relation between Quality Attenuation and MOS (Mean Opinion Score) of two different application: audio (a telephone call) and browsing Internet sites. For convenience, the average and standard deviation of the ΔQ|V component are displayed
Round Trip Time
Here the upstream and downstream components of the DeltaQ graphs on top of the page are merged together to show the total Quality Attenuation a packet is subject to, during the round trip between two endpoints.