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 Tokyo Node between 22 Nov 2008 21:00 GMT and 22 Nov 2008 22:00 GMT.

TO	Delay	Loss		TO	Delay	Loss
Amsterdam	257	0.0		Madrid	280	0.0
Barcelona	276	0.0		Milan	277	0.0
Brussels	265	0.0		Munich	275	0.0
Dublin	261	0.0		Paris	272	0.0
Dusseldorf	273	0.0		Stockholm	297	0.0
Frankfurt	273	0.0		Vienna	276	0.0
London	245	0.0		Zurich	272	0.0

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

Auckland	Jakarta	Mumbai	Taipei
Bangkok	Kuala Lumpur	Perth
Hong Kong	Manila	Singapore

Detailed round-trip delay and loss statistics to/from a larger number of cities within Europe, North America, 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.