Our IP Performance WWW site contains the results of round-trip delay and loss measurements which we perform between key locations on our IP Backbone Network, and to key locations on the networks of our strategic partners. Several of the pages on this site are updated hourly and thus reflect the current state of our network; other pages are there to provide a more historical view of the performance of our core network.

The following table contains the average PoP-to-PoP round-trip delay values (in ms) and percentage loss values for the BT Global Services Madley Node between 22 Nov 2008 20:00 GMT and 22 Nov 2008 21:00 GMT.

TO	Delay	Loss		TO	Delay	Loss
Amsterdam	12	0.0		Milan	32	0.0
Barcelona	37	0.0		Munich	34	0.0
Brussels	20	0.0		New York	85	0.0
Dublin	22	0.0		Paris	28	0.0
Dusseldorf	15	0.0		Stockholm	40	0.0
Frankfurt	19	0.0		Vienna	31	0.0
London	5	0.0		Washington	87	0.0
Madrid	42	0.0		Zurich	27	0.0

Click on one of the links below to access hourly round-trip delay and percentage loss statistics for other nodes within Europe.

Amsterdam	Dublin	Helsinki	Munich
Barcelona	Dusseldorf	Ilford (uk)	Paris
Birmingham (uk)	Ealing (uk)	Kingston (uk)	Prague
Bletchley (uk)	Edinburgh (uk)	London	Reading (uk)
Brussels	Frankfurt	Madrid	Stockholm
Budapest	Goonhilly	Manchester (uk)	Vienna
Copenhagen	Gothenburg	Milan	Zurich

Detailed round-trip delay and loss statistics to/from a larger number of cities within North America, Asia Pacific, and Latin America are also available.

Click here to return to the network details for the whole BT Global Services IP Backbone.

Notes
1) Each delay/loss value is colour-coded according to the acceptability of the result.
	Low delay/loss		High delay/loss
2) Further details of the measurements can be found by clicking on the "more information" button on the side navigation bar.