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 Dublin Node on 05 January 2009.

TO	Delay	Loss		TO	Delay	Loss
Amsterdam	24	0.0		Lima	166	0.4
Auckland	286	1.0		London	17	0.0
Bangkok	247	1.2		Los Angeles	162	0.0
Barcelona	52	0.0		Madley	22	0.0
Birmingham (uk)	21	0.0		Madrid	55	0.0
Bletchley (uk)	20	0.0		Manchester (uk)	23	0.0
Bogota	183	0.4		Manila	353	1.1
Brussels	32	0.0		Milan	44	0.0
Budapest	55	0.0		Mumbai	175	1.1
Buenos Aires	216	0.5		Munich	45	0.0
Caracas	NA	100		New York	85	0.0
Chicago	108	0.0		Paris	39	0.0
Copenhagen	67	0.0		Perth	351	1.1
Dallas	133	0.0		Prague	54	0.0
Dusseldorf	27	0.0		Quito	183	0.5
Ealing (uk)	18	0.0		Reading (uk)	20	0.0
Edinburgh (uk)	29	0.0		San Francisco	158	0.0
Frankfurt	30	0.0		Santiago	196	0.5
Goonhilly	31	0.0		Sao Paulo	196	0.5
Gothenburg	44	0.0		Singapore	NA	100
Helsinki	59	0.0		Stockholm	51	0.0
Hong Kong	251	1.1		Taipei	335	1.2
Ilford (uk)	17	0.0		Tokyo	287	1.1
Jakarta	231	0.1		Vienna	42	0.0
Kingston (uk)	19	0.0		Washington	91	0.0
Kuala Lumpur	227	0.0		Zurich	38	0.0

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

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