Telkom ADSL performance indicators
Telkom has released its latest ADSL Key Performance Indicators (KPIs), captured between 1 April 2009 and 6 July 2009. Telkom KPIs – a requirement of the ICASA ADSL regulations – were previously dogged by inaccuracies and mistakes, and the company moved from a fairly comprehensive set of results to a trimmed down version providing significantly less detail.
Three performance indicators form part of Telkom’s KPI reports: Packet Loss, Latency and Jitter. Each of these performance indicators are provided for Telkom’s national and international networks.
Measurement techniques
The international packet loss is measured and averaged over 5 international links to South America, Europe and Asia while national measurements and averages come from 9 edge service routers located at different exchanges throughout South Africa.
The same international links were used to measure latency while national round-trip times were measured and averaged over the same set of edge server routers used for packet loss measurements.
The international jitter was measured over 5 international links to South America, Europe and Asia while local measurements involved 9 edge services routers once again located at different exchanges throughout South Africa.
The results
Telkom’s KPI statistics may raise eyebrows from ADSL subscribers who may feel that the results are a theoretical exercise rather than representative of a real world ADSL experience. The latest stats are as follows:
International Key Performance Indicators
- Average International Packet Loss (%) – 0.028
- Average International Round-trip latency (ms) – 291.50
- Average International Jitter (ms) – 1.27
National Key Performance Indicators
- Average National Packet Loss (%) – 2.90
- Average National Round-trip latency (ms) – 16.10
- Average National Jitter (ms) – 3.76
Telkom ADSL KPIs – comments and views
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